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years old (San
Francisco Peaks) to nearly 20,000 years old (Bar Four well, Blue Spring). Groundwater age in the South Rim groundwater system also correlates to longitude, with age increasing from east to west from Red Canyon to Boucher springs. Surprisingly, the Canyon Mine Observation well is more similar to Redwall-Muav aquifer wells (R-aquifer) than to the Coconino C-aquifer. This suggests the possibility of a hydrologic connection or similar recharge sources for that hydrologic position. Old groundwater from Havasupai well may have a similar source to the Havasu Spring upwelling from the Redwall-Muav aquifer. Sites with younger estimated mean ages tend to be associated with the unconfined Coconino aquifer. They may recharge quickly as a result of snowmelt, run-off and local precipitation. It is likely that the deeper confined R-aquifer relies primarily on snowmelt from the San Francisco Peaks to recharge.
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728:. Discharge from the R-aquifer appears as springs and seeps in both the Grand Canyon and tributary canyons. Springs discharge to the Grand Canyon in areas of lower Paleozoic carbonates, and are associated with geologic faults and fractures. Fractures are believed to provide dominant pathways both for vertical circulation in the Paleozoic section, and for lateral collection and transport of water to springs deep in the canyons. The largest springs discharge from the R-aquifer. A smaller number of springs discharge at lower rates from the C-aquifer. Much of the water that could potentially recharge the aquifers is likely released as springs rather than reaching the aquifers.
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1550:, which delivers waves of moisture from the southeast, causing dramatic, localized thunderstorms fueled by the heat of the day). Average annual precipitation on the South Rim is less than 16 inches (41 cm), with 60 inches (150 cm) of snow; the higher North Rim usually receives 27 inches (69 cm) of moisture, with a typical snowfall of 144 inches (370 cm); and Phantom Ranch, far below the canyon's rims along the Colorado River at 2,500 feet (760 m) gets just 8 inches (200 mm) of rain, and snow is a rarity.
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1743:'s "Climate Action Plan," goals were set to reduce greenhouse gases 30 percent below 2008 levels by 2020 and plan and implement measures that best allow the park to adapt to the impacts of climate change. Strategies to accomplish these goals included: "reduce emissions resulting from activities within and by the park, developing and implementing a plan to adapt to current and future impacts of climate change, increase climate change education and outreach, and monitor progress and identify areas for improvement".
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2626:. North Rim campsites are only open seasonally due to road closures from weather and winter snowpack. All overnight camping below the rim requires a backcountry permit from the Backcountry Office (BCO). Each year Grand Canyon National Park receives approximately 30,000 requests for backcountry permits. The park issues 13,000 permits, and close to 40,000 people camp overnight. The earliest a permit application is accepted is the first of the month, four months before the proposed start month.
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1107:, in a series of articles run in 1853, Captain Joseph R. Walker in January 1851 with his nephew James T. Walker and six men, traveled up the Colorado River to a point where it joined the Virgin River and continued east into Arizona, traveling along the Grand Canyon and making short exploratory side trips along the way. Walker is reported to have said he wanted to visit the "Moqui" (Hopi) Indians. who he had met briefly before and found exceptionally interesting.
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1369:(formerly Canyon Uranium Mine). Activity at the mine had ceased in 1992, ten years prior to the moratorium on new development in 2012. Appellants challenged the U.S. Forest Service's consultation process for approving reopening of the mine. As of February 22, 2022, the 9th U.S. Circuit Court of Appeals rejected the arguments in No. 20-16401, concluding that the Forest Service had not acted arbitrarily in making its decision.
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early as 1926. Early on, water for human use was brought in by tankers, and pumped up from a spring deeper in the canyon. In the 1960s, the
Transcanyon Pipeline was built to carry water from the North Rim down into the canyon and back up to the South Rim. Every day 500,000 gallons of water are pumped from underground springs on the North Rim through the pipeline to supply the more heavily developed South Rim with water.
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957:, along with Hopi guides and a small group of Spanish soldiers, traveled to the south rim of the Grand Canyon between Desert View and Moran Point. Pablo de Melgrossa, Juan Galeras, and a third soldier descended some one third of the way into the canyon until they were forced to return because of lack of water. In their report, they noted that some of the rocks in the canyon were "bigger than the great tower of Seville,
1517:, one of Mary Colter's best-known works, was built in 1932. Situated at the far eastern end of the South Rim, 27 miles (43 km) from Grand Canyon Village, the tower stands 70 feet (21 m) tall. The top of the tower is 7,522 feet (2,293 m) above sea level, the highest point on the South Rim. It offers one of the few full views of the bottom of the canyon and the Colorado River. It was designed to mimic
1340:"People from all over the country and around the world come to visit the Grand Canyon. Numerous American Indian tribes regard this magnificent icon as a sacred place and millions of people in the Colorado River Basin depend on the river for drinking water, irrigation, industrial and environmental use." However, Salazar's 20-year moratorium on new mines still allows mines with previous authorization to operate.
2652:(seven miles from the South Rim) for canyon flyovers. Scenic flights are no longer allowed to fly within 1,500 feet (460 m) of the rim within the national park because of a late 1990s crash. The last aerial video footage from below the rim was filmed in 1984. However, some helicopter flights land on the Havasupai and Hualapai Indian Reservations within Grand Canyon (outside of the park boundaries).
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348:. While some aspects about the history of incision of the canyon are debated by geologists, several recent studies support the hypothesis that the Colorado River established its course through the area about 5 to 6 million years ago. Since that time, the Colorado River has driven the down-cutting of the tributaries and retreat of the cliffs, simultaneously deepening and widening the canyon.
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2540:(5%), Florida (3%) and New York (4%) represented the top domestic visitors. Seventeen percent of visitors were from outside the United States; the most prominently represented nations were the United Kingdom (3%), Canada (4%), Japan (2%), Germany (2%) and the Netherlands (1%). The South Rim is open all year, weather permitting. The North Rim is generally open mid-May to mid-October.
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Reclamation, recommended that the park drill a well into the
Redwall-Muav aquifer to meet the increasing water consumption. However, the aquifer's recharge rate stands to decline over time due to decreases in precipitation and snowpack. Some effects of over pumping aquifers include land subsidence, reduction in rivers and lakes, disrupted riparian systems, and poor water quality.
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2662:. On 420 acres (170 ha) there would be shops, an IMAX theater, hotels and an RV park. A gondola would enable easy visits to the canyon floor where a "riverwalk" of "connected walkways, an eatery, a tramway station, a seating area and a wastewater package plant" would be situated. On October 31, 2017, the Navajo Nation Council voted against the project.
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Formation and Supai Group provide a dense barrier. Groundwater from the C-acquifer can flow laterally, appearing as seeps along the canyon walls at the base of the
Coconino Sandstone but can also descend vertically through fault zones to recharge the underlying confined R-aquifer. The R-aquifer, also known as the Red Wall Muav aquifer, is a
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He chose to smoke a peace pipe with them. Powell went on to become the first
Director of the U.S. Bureau of Ethnology of the Smithsonian Institution (1879â1902) and the second Director of the US Geological Survey (1881â1894). He was the first to use the term "Grand Canyon", in 1871; previously it had been called the "Big Canyon".
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16.5%, in spite of a slight increase of +1.4% in annual precipitation over the same period. Increases in temperature correlate to increased evaporation, loss of reflective snow, and decreases in snowpack, reducing available water in the
Colorado River by an estimated 9.3% per degree Celsius of warming.
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and three of the four desert types in North
America. The five life zones represented are the Lower Sonoran, Upper Sonoran, Transition, Canadian, and Hudsonian. This is equivalent to traveling from Mexico to Canada. Differences in elevation and the resulting variations in climate are the major factors
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The aspect, or direction a slope faces, also plays a major role in adding diversity to the Grand Canyon. North-facing slopes receive about one-third the normal amount of sunlight, so plants growing there are similar to plants found at higher elevations, or in more northern latitudes. The south-facing
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Differences in visibility tend to be seasonal: best during the winter and poorest during the summer. Winter cold fronts tend to carry clean, crisp air from the northwest, a less populated area. However they can also carry pollution from nearby mines and power plants. The average visibility during the
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The
National Weather Service has had a cooperative station on the South Rim since 1903. The record high temperature on the South Rim was 105 °F (41 °C) on June 26, 1974, and the record low temperature was â20 °F (â29 °C) on January 1, 1919, February 1, 1985, and December 23, 1990.
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Between 2003 and 2011, 2,215 mining claims had been requested that are adjacent to the canyon, including claims for uranium mines. Critics of uranium mining are concerned that uranium will leach into the aquifers feeding the
Colorado River and contaminate the water supply for up to 18 million people.
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that the Grand Canyon bisects is over one thousand feet (300 m) higher at the North Rim than at the South Rim. Almost all runoff from the North Rim (which also gets more rain and snow) flows toward the Grand Canyon, while much of the runoff on the plateau behind the South Rim flows away from the
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in Nepal is much deeper), the Grand Canyon is known for its visually overwhelming size and its intricate and colorful landscape. Geologically, it is significant because of the thick sequence of ancient rocks that are well preserved and exposed in the walls of the canyon. These rock layers record much
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There are approximately 41 reptile species in Grand Canyon
National Park. Ten are considered common along the river corridor and include lizards and snakes. Lizard density tends to be highest along the stretch of land between the water's edge and the beginning of the upland desert community. The two
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As of 1999 the Grand Canyon area had some of the cleanest air in the United States. However, air quality in the area can be affected by air pollution from coal-fired power plants, mining, oil and gas, vehicles, and urban and industrial pollution from nearby states, California and Mexico. Events such
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Weather conditions can greatly affect hiking and canyon exploration, and visitors should obtain accurate forecasts because of hazards posed by exposure to extreme temperatures, winter storms and late summer monsoons. While the park service posts weather information at gates and visitor centers, this
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On August 28, 1869, faced with what some felt to be impassable rapids, three men left the expedition on foot in an attempt to reach a settlement 75 miles (121 km) away. Ironically, the remaining members went safely through the rapids on August 29, 1869, while Seneca Howland, Oramel Howland, and
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aquifer. It involves an area of substantial fracturing through the Redwall Limestone, Temple Butte Formation and Cambrian Muav Limestone of the Tonto Group. Five individual systems flow through the R-aquifer and compose the regional groundwater-flow system which drains into the Grand Canyon: Kaibab,
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Grand Canyon National Park is one of the world's premier natural attractions, attracting about five million visitors per year. According to a survey conducted of visitors to the canyon between September 2003 through August 2004, 83% were from the United States: California (12%), Arizona (9%), Texas
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Due to the increase of greenhouse gases, temperatures have steadily risen making recent years the warmest in the century-long record. Temperatures have increased in Arizona by 2.1 degrees Fahrenheit since 1895. From 1916 to 2014, naturalized streamflow in the Upper Colorado River Basin decreased by
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Temperatures vary wildly throughout the year, with summer highs within the Inner Gorge commonly exceeding 100 °F (38 °C) and winter minimum temperatures sometimes falling below zero degrees Fahrenheit (â18 °C) along the canyon's rims. Visitors are often surprised by these potentially
1418:. He built the cabin because of a copper deposit that was nearby. He had several occupations such as miner, judge, politician, author and tour guide. This cabin is the longest continually standing structure on the South Rim. It is currently used as a guest house; booking is required well in advance.
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settlers. Which group was responsible for killing the three men has been hotly debated. Powell himself visited the area the following year, and was told (through a Mormon interpreter) that the Shivwits had mistakenly killed the men, believing them to be prospectors who had murdered an Indian woman.
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is a 78-mile (126 km) race over 24 hours. The floor of the valley is accessible by foot, muleback, or by boat or raft from upriver. Hiking down to the river and back up to the rim in one day is discouraged by park officials because of the distance, steep and rocky trails, change in elevation,
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are very rare in the Colorado River corridor; they have undergone major declines and have not been seen in the Canyon in several years. There are 33 crustacean species found in the Colorado River and its tributaries within Grand Canyon National Park. Of these 33, 16 are considered true zooplankton
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Natural seeps and springs percolating out of the canyon walls are home to 11% of all the plant species found in the Grand Canyon. The canyon itself can act as a connection between the east and the west by providing corridors of appropriate habitat along its length. The canyon can also be a genetic
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are typically conducted in the spring and fall in the forests adjacent to the canyon to reduce the potential for severe forest fires and resulting smoke conditions. Although prescribed fires also affect air quality, the controlled conditions allow the use of management techniques to minimize their
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was built in 1905 as a luxury hotel for the Atchison, Topeka, and Santa Fe Railway, on the South Rim near the railway's main line. It was designed by Charles Whittlesley, a staff architect for the railway. The hotel is reminiscent of a Swiss chalet or Norwegian villa, combined with local materials
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A study examining samples of groundwater from 180 spring sites and 26 wells in the Grand Canyon region has assessed the presence of uranium in groundwater from September 1, 1981, to October 7, 2020. The goal of the study was to establish a baseline assessment of groundwater conditions in the Grand
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published a Notice of Intent to suspend approvals for new uranium mining in the area. In 2012, Salazar established a 20-year moratorium (known as the "Northern Arizona Withdrawal") withdrawing 1 million acres (4,000 km) from the permitting process for uranium and hardrock mining, stating
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Uplift associated with mountain formation later moved these sediments thousands of feet upward and created the Colorado Plateau. The higher elevation has also resulted in greater precipitation in the Colorado River drainage area, but not enough to change the Grand Canyon area from being semi-arid.
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About 770 deaths have occurred between the mid-1800s and 2015. Of the fatalities that occurred from 1869 to 2001, some were as follows: 53 resulted from falls; 65 were attributable to environmental causes, including heat stroke, cardiac arrest, dehydration, and hypothermia; 7 were caught in flash
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Over the last 30 years, the South Rim of the Grand Canyon has averaged 13.4 inches of rainfall per year, while the North Rim has averaged 24 inches. The first dual distribution water system in the United States was built on the South Rim, treating and reclaiming wastewater for nonpotable reuse as
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Other research has tried to relate groundwater flow paths to possible levels of risk for contamination and identify vulnerability regions for the underlying aquifers. Almost half of the Kaibab plateau's surface was associated with high to very high vulnerability of the unconfined Coconino aquifer
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affected visibility in the canyon, mainly in the winter. As a result, scrubbers were added to the plant's three units in 1997 through 1999 to reduce SO2 emissions by 90% on an annual average. Before and after observations showed a wintertime decrease of 33% for particulate sulfur (Sp), improving
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Weather in the Grand Canyon varies according to elevation. The forested rims are high enough to receive winter snowfall, but along the Colorado River in the Inner Gorge, temperatures are similar to those found in Tucson and other low elevation desert locations in Arizona. Conditions in the Grand
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U.S. President Theodore Roosevelt visited the Grand Canyon in 1903. An avid outdoorsman and staunch conservationist, Roosevelt established the Grand Canyon Game Preserve on November 28, 1906. Livestock grazing was reduced, but predators such as mountain lions, eagles, and wolves were eradicated.
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set out to explore the Colorado River and the Grand Canyon in the first expedition down the canyon. Powell ordered a shipwright to build four reinforced Whitewall rowboats from Chicago and had them shipped west on the newly completed Continental railroad. He hired nine men, including his brother
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Studies of the chemical composition of groundwater at sites across the Grand Canyon region indicate that groundwater contains a fraction of modern water (post-1950), and that many springs have a mix of modern water and older groundwater. Estimated mean ages for South Rim groundwater range from 6
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million years. For more than 150 years, scientists have gathered data, proposed new ideas, and debated sometimes contentious theories about the geologic origins of the Grand Canyon and the Colorado River. Formation of the Grand Canyon and the Colorado River may involve a complex history in which
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Temperatures on the North Rim are generally lower than those on the South Rim because of the greater elevation (averaging 8,000 feet or 2,400 meters above sea level). Heavy rains are common on both rims during the summer months. Access to the North Rim via the primary route leading to the canyon
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found in Grand Canyon National Park. This variety is largely due to the 8,000 foot (2,400 m) elevation change from the Colorado River up to the highest point on the North Rim. Grand Canyon boasts a dozen endemic plants (known only within the Park's boundaries) while only ten percent of the
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near the canyon's south rim. On September 19, near present-day National Canyon, they came upon what May Humphreys Stacey described in his journal as "a wonderful canyon; four thousand feet deep. Everybody in the party admitted that he never before saw anything to match or equal this astonishing
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As water consumption continues to soar due to increasing visitation in the park, both the sustainability of the water supply and the condition of the pipeline are in question. As of 2019, plans to replace the aging 16-mile aluminum pipeline were proposed. Another proposal, from the Bureau of
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The different geologic levels of the Grand Canyon have created two major aquifers where groundwater collects. The higher C-aquifer is an unconfined aquifer. It collects groundwater that seeps through the Kaibab and Toroweap Formations into the Coconino Sandstone. Below it, the Permian Hermit
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was completed in 1910 and contains 2 levels. Gordon Chappell, Regional Historian for the Park Service, claims that this depot building is one of only three log-cabin-style train stations currently standing, out of fourteen ever built in the U.S. The depot is the northern terminus of the
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Approximately 30 bird species breed primarily in the desert uplands and cliffs of the inner canyon. Virtually all bird species present breed in other suitable habitats throughout the Sonoran and Mohave deserts. The abundance of bats, swifts, and riparian birds provides ample food for
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winter is 160 miles, with the potential to reach 210 miles under ideal conditions. In the summer, prevailing winds from the southwest carry pollution from major urban and industrial centers, and visibility on average is only 100 miles. Within the canyon itself, smog can be trapped.
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in 1963. Average flood levels dropped from 85,000 to 8,000 cubic ft/sec. In the absence of natural flooding, sandbars and beaches eroded and invasive species began to displace native species. Federal officials started releasing floods in the Grand Canyon in hopes of restoring its
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beginning with 1996, 2004, and 2008. In 2018, the Department of Interior started experimenting with âadaptive managementâ of the Glen Canyon Dam, using a High-Flow Experiment (HFE) water release to shift volumes of sand and monitoring effects such as the dispersal of invasive
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established a goal of restoring visibility in national parks and wilderness areas (Class 1 areas), such as the Grand Canyon, to natural background levels by 2064. Subsequent revisions to the rule provide specific requirements for making reasonable progress toward that goal.
1126:, on May 24. On June 7, they lost one of their boats, 1/3 of their food, and other badly-needed supplies: as a result the team eventually had to subsist on starvation rations. Passing through (or portaging around) a series of dangerous rapids, the group passed down the
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floods; 79 were drowned in the Colorado River; 242 perished in airplane and helicopter crashes (128 of them in the 1956 disaster mentioned below); 25 died in freak errors and accidents, including lightning strikes and rock falls; and 23 were the victims of homicides.
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Multiple challenges have been brought into court both against the moratorium and against the operation of uranium mines in the area. The federal government's 2012 moratorium was upheld by the U.S. District Court for Arizona in 2014, but appealed in November 2014 as
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The emerging scientific consensus is that the canyon is made up of multiple segments which formed at different times and eventually connected to become the waterway now traversed by the Colorado River. Of the three central segments, the "Hurricane" was formed
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departed Los Angeles International Airport within three minutes of one another on eastbound transcontinental flights. Approximately 90 minutes later, the two propeller-driven airliners collided above the canyon while both were flying in unmonitored airspace.
2259:, and pinyon-juniper woodlands. Elevations of 3,500 to 4,000 feet (1,100 to 1,200 m) are in the Mojave Desert Scrub community of the Upper Sonoran. This community is dominated by the four-winged saltbush and creosote bush; other important plants include
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On August 8, 2023, it was announced that U.S. President Joe Biden will designate Baaj Nwaavjo Iâtah Kukveni â Ancestral Footprints of the Grand Canyon National Monument, a move aimed at conserving nearly 1 million acres of greater Grand Canyon landscape.
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struck a rock. Ives led his party east into the canyon â they may have been the first Europeans to travel the Diamond Creek drainage. In his "Report Upon the Colorado River of the West" to the Senate in 1861 Ives states that "The marvellous story of
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that form the various life zones and communities in and around the canyon. Grand Canyon National Park contains 129 vegetation communities, and the composition and distribution of plant species are influenced by climate, geomorphology and geology.
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Camping on the North and South rims is generally restricted to established campgrounds and reservations are highly recommended, especially at the busier South Rim. There is at large camping available along many parts of the North Rim managed by
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century, newer cultures had evolved. The Hualapai inhabit a 100-mile (160 km) stretch along the pine-clad southern side of the Grand Canyon. The Havasupai have been living in the area near Cataract Canyon since the beginning of the
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1657:. The GCVTC released its final report in 1996 and initiated the Western Regional Air Partnership (WRAP), a partnership of state, tribal and federal agencies to help coordinate the implementation of the commission's recommendations.
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Ponderosa pine forests grow at elevations between 6,500 and 8,200 feet (2,000 and 2,500 m), on both North and South rims in the Transition life zone. The South Rim includes species such as gray fox, mule deer, bighorn sheep,
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The great depth of the Grand Canyon and especially the height of its strata (most of which formed below sea level) can be attributed to 5,000â10,000 feet (1,500â3,000 m) of uplift of the Colorado Plateau, starting about
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is the third major area with tourist services, about 125 mi (201 km) driving from Las Vegas and about 250 miles (400 km) by road from Grand Canyon Village at the South Rim. The tribe opened the glass-bottomed
1531:. Inside the lodge is a small museum honoring Fred Harvey (1835â1901), who played a major role in popularizing the Grand Canyon. In the History Room is a stone fireplace layered in the same sequence as those in the canyon.
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in 1905. He sold arts and crafts as well as souvenirs. Until September 2008, it was run by his descendants; in November 2008, the building reopened as a visitor center focusing on the history of the Grand Canyon Village
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area of the United States. They were the first people known to live in the Grand Canyon area. The cultural group has often been referred to in archaeology as the Anasazi, although the term is not preferred by the modern
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were deposited in warm shallow seas, near-shore environments (such as beaches), and swamps as the seashore repeatedly advanced and retreated over the edge of a proto-North America. Major exceptions include the Permian
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are two amphibians that are common in the rim forests. Of the approximately 90 bird species that breed in the coniferous forests, 51 are summer residents and at least 15 of these are known to be neotropical migrants.
961:". It is speculated that their Hopi guides likely knew routes to the canyon floor, but may have been reluctant to lead the Spanish to the river. No Europeans visited the canyon again for more than two hundred years.
1086:, that had formed for so long a time the only record concerning this rather mythical locality, was rather magnified than detracted from by the accounts of one or two trappers, who professed to have seen the caĂąon".
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1981:, are mostly omnivorous, using many different vegetation types. Grand Canyon bats typically roost in desert uplands but forage on the abundance of insects along the river and its tributaries. In addition to bats,
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occurs twice annually, during seasonal pattern shifts in winter (when Pacific storms usually deliver widespread, moderate rain and high-elevation snow to the region from the west) and in late summer (due to the
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Also in 1776, Fray Francisco Garces, a Franciscan missionary, spent a week near Havasupai unsuccessfully attempting to convert a band of Native Americans to Christianity. He described the canyon as "profound".
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from the much higher temperatures at the bottom. Rescues are required annually of unsuccessful rim-to-river-to-rim travelers. Nevertheless, hundreds of fit and experienced hikers complete the trip every year.
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seeds. However, as of 2022, extreme drought has caused water levels in Lake Powell to drop so much that a planned release of water has been delayed, to ensure that the Glen Canyon Dam can continue to generate
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asked Lieutenant Joseph Ives to lead an expedition to assess the feasibility of an up-river navigation from the Gulf of California. On December 31, 1857, Ives embarked from the mouth of the Colorado in the
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in the early 1980s, bighorn sheep numbers have rebounded. Mule deer are generally not permanent residents along the river but travel down from the rim when food and water resources there become scarce.
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Montane meadows and subalpine grassland communities of the Hudsonian life zone are rare and located only on the North Rim. Both are typified by many grass species. Some of these grasses include
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Air quality and visibility in the canyon are affected mainly by sulfates, soils, and organics. The sulfates largely result from urban emissions in southern California, borne on the prevailing
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s Maximum Contaminant Level for drinking water, 30 Îźg/L. At 86% of sites, uranium concentrations were below the Canadian level for protection of freshwater aquatic life, 15 Îźg/L.
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Karlstrom, Karl E.; Lee, John P.; Kelley, Shari A.; Crow, Ryan S.; et al. (2014). "Formation of the Grand Canyon 5 to 6 million years ago through integration of older palaeocanyons".
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The Upper Sonoran Life Zone includes most of the inner canyon and South Rim at elevations from 3,500 to 7,000 feet (1,100 to 2,100 m). This zone is generally dominated by blackbrush,
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1511:, another Mary Colter design, was built in 1914. Photography, artwork, books, souvenirs, and rock and fossil specimens are sold here. A great view of Bright Angel Trail can be seen here.
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The federal government administrators who manage park resources face many challenges. These include issues related to the recent reintroduction into the wild of the highly endangered
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is shown by clicking the canyon's location on the map and selecting 'Fine Mass' from dropdown box above the map. Visibility is shown by selecting 'Deciview' from the dropdown box.
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7347:"Revision of the Visibility FIP (Federal Implementation Plan) for Nevada (to include emissions reduction requirements for the Mohave Generating Station): Final Rule Fact Sheet"
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The Lower Sonoran life zone spans from the Colorado River up to 3,500 feet (1,100 m). Along the Colorado River and its perennial tributaries, a riparian community exists.
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In 2016, skydiving at the Grand Canyon become possible with the first Grand Canyon Skydiving operation opening up at the Grand Canyon National Park Airport, on the South Rim.
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was found dead from a self-inflicted gunshot wound on a canyon trail. He was under investigation for the murder of his ex-girlfriend which had taken place the day before in
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700:, the ease with which water flows through it. Sand is more permeable than clay. Less permeable rock layers composed of clay can block the passage of water and are known as
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canyon (following the general tilt). The result is deeper and longer tributary washes and canyons on the north side and shorter and steeper side canyons on the south side.
2172:, which seems to be distributed only near water along the Colorado River, all of the reptiles found near the river also appear in the uplands, but in lower densities. The
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Hurlbut, David J.; Haase, Scott; Brinkman, Gregory; Funk, Kip; Gelman, Rachel; Lantz, Eric; Larney, Christina; Peterson, David; Worley, Christopher; Liebsch, Ed (2012).
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million years ago. In contrast, the "Marble Canyon" and "Westernmost Grand Canyon" segments at the ends of the canyon were carved in the last five to six million years.
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298:, United States. The Grand Canyon is 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile (6,093 feet or 1,857 meters).
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Above the desert scrub and up to 6,200 feet (1,900 m) is a pinyon pine forest and one seed juniper woodland. Within this woodland one can find big sagebrush,
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1359:(No. 14-17350). The 9th Circuit Court of Appeals again upheld the moratorium in 2017, stating that the Secretary of the Interior held valid withdrawal authority.
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11035:
7089:"Recommendations for Improving Western Vistas, Report of the Grand Canyon Visibility Transport Commission to the United States Environmental Protection Agency"
4902:
708:. An area of water bounded by two aquitards is called a confined aquifer, while water below the surface and above an aquitard is called an unconfined aquifer.
490:
million years. The research has aroused considerable controversy because it suggests a substantial departure from prior widely supported scientific consensus.
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strata, and it is also one of the six distinct physiographic sections of the Colorado Plateau province. Even though it is not the deepest canyon in the world (
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also increased the amount of water in the Colorado River drainage system. The ancestral Colorado River responded by cutting its channel faster and deeper.
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10597:
3462:
Leydsman McGinty, Ellie I.; McGinty, Christopher M. (2009). "Physiography of Utah". In Banner, R. E.; Baldwin, B. D.; Leydsman McGinty, Ellie I. (eds.).
1436:. Emery Kolb showed this movie regularly in his studio until 1976 when he died at the age of 95. Today the building serves as an art gallery and exhibit.
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was also argued at multiple court levels based on multiple grounds. The Havasupai people and the Grand Canyon Trust sought to block the reopening of the
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In the most recent round of "old river" vs. "young river" controversy, researchers have challenged estimates that had placed the age of the canyon at 5â6
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1030:, before his second expedition to the Grand Canyon, serving as a diplomat between Powell and the local native tribes to ensure the safety of his party.
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2118:. Many snake species, which are not directly dependent on surface water, may be found both within the inner gorge and the Colorado River corridor. Six
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Over the edge : death in Grand Canyon : gripping accounts of all known fatal mishaps in the most famous of the world's seven natural wonders
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For thousands of years, the area has been continuously inhabited by Native Americans, who built settlements within the canyon and its many caves. The
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Uncle Sam's camels; the journal of May Humphreys Stacey supplemented by the report of Edward Fitzgerald Beale (1857â1858) edited by Lewis Burt Lesley
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grow in this community. The mammalian fauna in the woodland scrub community consists of 50 species, mostly rodents and bats. Three of the five Park
1158:, and 14 others started to explore the Grand Canyon in poorly designed cedar wood boats, with no life preservers. Brown drowned in an accident near
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activity deposited ash and lava over the area, which at times completely obstructed the river. These volcanic rocks are the youngest in the canyon.
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for 11 years. Grand Canyon National Park was finally established as the 17th U.S. National Park by an Act of Congress signed into law by President
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in the 1850s to locate suitable river crossing sites in the canyon. Building good relations with local Hualapai and white settlers, he reached the
736:(C-aquifer), while about a fifth of the Kaibab Plateau was estimated to be an area of high vulnerability for the Redwall-Muav aquifer (R-aquifer).
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4278:"Rethinking groundwater flow on the South Rim of the Grand Canyon, USA: characterizing recharge sources and flow paths with environmental tracers"
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emitted by vegetation in the surrounding forests. Nitrates, carried in from urban areas, stationary sources, and vehicle emissions; as well as
800:. Beginning with the earliest explorations and excavations, researchers have believed that the Ancestral Puebloans are ancestors of the modern
6358:
2727:, near the confluence of the Colorado and Little Colorado rivers. The disaster killed all 128 passengers and crew members aboard both planes.
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is a rough approximation only, and should not be relied upon for trip planning. For accurate weather in the canyon, hikers should consult the
1077:. His party reached the lower end of Black Canyon on March 8, 1858, then continued on by rowboat past the mouth of the Virgin River after the
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1462:, located on the Third Mesa in eastern Arizona. It served as a residence for the Hopi Indians who sold arts and crafts to South Rim visitors.
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was built in 1904 by brothers Ellsworth and Emery Kolb. They were photographers who made a living by photographing visitors walking down the
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Tourists wishing for a more vertical perspective can go skydiving, board helicopters and small airplanes in Boulder, Las Vegas, Phoenix and
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Only 48 bird species regularly nest along the river, while others use the river as a migration corridor or as an overwintering habitat. The
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Conceptual models of groundwater flow in the Grand Canyon region, Arizona: U.S. Geological Survey Scientific Investigation Report 2022â5037
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Yanawant Paiute Places and Landscapes in the Arizona Strip: Volume Two of the Arizona Strip Landscapes and Place Name Study, Part 2, p. 69
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James Ohio Pattie, along with a group of American trappers and mountain men, may have been the next European to reach the canyon, in 1826.
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1898:(saltcedar) are the predominant species. Hanging gardens, seeps and springs often contain rare plants such as the white-flowering western
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4366:"Modeling intrinsic vulnerability of complex karst aquifers: modifying the COP method to account for sinkhole density and fault location"
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Above the river corridor a desert scrub community, composed of North American desert flora, thrives. Typical warm desert species such as
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A number of actions have been taken to preserve and further improve air quality and visibility at the canyon. In 1990, amendments to the
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7147:"Federal Register 40 CFR Part 51: Regional Haze Regulations and Guidelines for Best Available Retrofit Technology (BART) Determinations"
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7237:"The Effects of Scrubber Installation at the Navajo Generating Station on Particulate Sulfur and Visibility Levels in the Grand Canyon"
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of the Colorado River and its tributaries, which in turn has increased their speed and thus their ability to cut through rock (see the
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was a major proponent of the preservation of the Grand Canyon area and visited it on numerous occasions to hunt and enjoy the scenery.
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3728:"Western U.S. Tectonics: The Origin of the Grand Canyon â Controversy and Tectonic Implications â SYNTHESIS AND TECTONIC IMPLICATIONS"
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throughout much of the year, and emissions from Arizona's copper smelter region, borne on southerly or southeasterly winds during the
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have made the eastern part of the Park their home, having been re-introduced to the Colorado Plateau on the Arizona Strip earlier.
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of 1906 which gave Roosevelt the power to create national monuments. Once the act was passed, Roosevelt immediately added adjacent
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Spencer, J.E.; Patchett, P.J.; Pearthree, P.A.; House, P.K.; Sarna-Wojcicki, A.M.; Wan, E.; Roskowski, J.A.; Faulds, J.E. (2013).
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The Park contains several major ecosystems. Its great biological diversity can be attributed to the presence of five of the seven
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2601:, which features a narrow peninsula surrounded on all sides by steep dropoffs. On the north side of the canyon to the west, the
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William H. Dunn were murdered. The area through which the three men traveled was marked by tensions between farming and hunting
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to California in 1776. They eventually found a crossing, formerly known as the "Crossing of the Fathers", that today lies under
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Elevations of 8,200 to 9,000 feet (2,500 to 2,700 m) are in the Canadian Life Zone, which includes the North Rim and the
2251:, 2008. Wild condors are numbered to aid wildlife researchers. As of April 2009, there were 172 wild California condors known.
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extreme conditions, and this, along with the high altitude of the canyon's rims, can lead to unpleasant side effects such as
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Nearly two billion years of Earth's geological history have been exposed as the Colorado River and its tributaries cut their
105:
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cut willows, cottonwoods, and shrubs for food, and can significantly affect the riparian vegetation. Other rodents, such as
1634:. Organic particles result from vehicle emissions, long-range transport from urban areas, and forest fires, as well as from
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Archaeologists still debate when this distinct culture emerged. The current consensus, based on terminology defined by the
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6784:"US Annual Spatial and Seasonal Patterns of PM2.5, Light Extinction and Contributions of Major Aerosol Types, 1996 â 1998"
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3310:"Review and analysis of the age and origin of the Pliocene Bouse Formation, lower Colorado River Valley, southwestern USA"
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Okun, Daniel A. (May 2000). "Water Reclamation and Unrestricted Nonpotable Reuse: A New Tool in Urban Water Management".
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7180:"RA BART (Reasonably Attributable Best Available Retrofit Technology) Case Study, Navajo Generating Station, Appendix C"
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Navajo Generating Station and Air Visibility Regulations: Alternatives and Impacts: Technical Report NREL/TP-6A20-53024
7234:
Green, Mark; Farber, Rob; Lien, Nghi; Gebhart, Kristi; Molenar, John; Iyer, Hari; Eatough, Delbert (November 1, 2005).
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5922:"On-going experiment in high-volume CO River releases from Glen Canyon Dam set | Arizona Department of Water Resources"
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5692:
5066:
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4609:
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3928:"Unroofing, incision, and uplift history of the southwestern Colorado Plateau from apatite (U-Th)/He thermochronometry"
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in 2007, which has since attracted "thousands of visitors a year, most from Las Vegas". Also at Grand Canyon West is
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on January 11, 1908. Opponents such as land and mining claim holders blocked efforts to reclassify the monument as a
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645:(its lowest point). This increased the rate of erosion and cut nearly all of the Grand Canyon's current depth by 1.2
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In 1889, Frank M. Brown wanted to build a railroad along the Colorado River to carry coal. He, his chief engineer
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eastwards towards the Four Corners. Archaeological and linguistic evidence suggests the Navajo descended from the
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This accident led to the institution of high-altitude airways and direct radar observation of aircraft (known as
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to the west were similarly found to affect visibility in the canyon. The plant was required to have installed SO
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In addition to the Ancestral Puebloans, a number of distinct cultures have inhabited the Grand Canyon area. The
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3499:"A geological journey through the deepest gorge on Earth: the Kali Gandaki valley section, west-central Nepal"
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3697:"Western U.S. Tectonics: The Origin of the Grand Canyon â Controversy and Tectonic Implications â Intro page"
3528:
Marlatt, William; Riehl, Herbert (December 15, 1963). "Precipitation regimes over the upper Colorado River".
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In 1956, the Grand Canyon was the site of the deadliest commercial aviation disaster in history at the time.
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Jones, Natalie A.; Hansen, Jered; Springer, Abraham E.; Valle, Cynthia; Tobin, Benjamin W. (December 2019).
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7062:. Cooperative Institute for Research in the Atmosphere (CIRA), Colorado State University. Archived from
6051:"Secretary Salazar Announces Decision to Withdraw Public Lands near Grand Canyon from New Mining Claims"
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1825:
slopes receive the full amount of sunlight and are covered in vegetation typical of the Sonoran Desert.
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results suggesting that parts of the Grand Canyon had reached a depth near to the modern depth around 20
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7785:"Climate Change, Development, and Groundwater-Surface Water Interactions in Grand Canyon National Park"
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2584:. Grand Canyon National Park also has a visitor center in an easterly area known as the North Rim, via
2565:
1962:
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1309:, air tour overflight noise levels, water rights and management disputes, and forest fire management.
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6270:"Biden designates new national monument surrounding the Grand Canyon, blocking mining | CNN Politics"
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In a 2008 study, Victor Polyak examined caves near the Grand Canyon and placed their origins about 17
2564:
There are many viewing points on all sides of the canyon, with the most accessible locations inside
976:
and traveled along the north rim of the canyon in Glen and Marble Canyons in search of a route from
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6754:. Interagency Monitoring of Protected Visual Environments (IMPROVE). March 19, 1999. Archived from
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1579:
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8819:
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6910:
6204:
Tillman, Fred D.; Beisner, Kimberly R.; Anderson, Jessica R.; Unema, Joel A. (November 16, 2021).
2658:
In 2014, a developer announced plans to build a multimedia complex on the canyon's rim called the
1138:, on July 17. Continuing on down the Colorado River, the party encountered more rapids and falls.
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8674:"Former MLB player suspected of killing ex-girlfriend found dead of self-inflicted gunshot wound"
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This article is about the canyon in the southwestern United States. For other Grand Canyons, see
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4526:(Third ed.). North Palm Beach, Florida: National Photographic Collections. pp. 12â13.
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9774:
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4365:
3820:"Age and evolution of the Grand Canyon revealed by U-Pb dating of water table-type speleothems"
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have been identified in and around Grand Canyon National Park. Of the aquatic species, two are
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7579:"Colorado River flow dwindles as warming-driven loss of reflective snow energizes evaporation"
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There are several historic buildings located along the South Rim with most in the vicinity of
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multiple factors and geologic processes have interacted over time and in different locations.
462:
Diagram showing the placement, age and thickness of the rock units exposed in the Grand Canyon
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9383:
9357:
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8781: â bibliography of the Grand Canyon. 37,462 items produced between 1540 and the present.
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8393:
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8277:
8233:
8187:
8139:
8100:
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8017:
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7893:
6911:"Source Contributions to Visibility Impairment in the Southeastern and Western United States"
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Park's flora is exotic. Sixty-three plants found here have been given special status by the
1527:
was built of logs and stone in 1935. Mary Colter designed the lodge and it was built by the
1458:
in 1905. It is based on structures that were built in an ancient Hopi settlement called Old
704:. More permeable areas of rock that hold and transport groundwater underground are known as
551:
The major geologic exposures in the Grand Canyon range in age from the two-billion-year-old
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2020:
1993:
are the most numerous riparian predators and prey on invertebrates, rodents, and reptiles.
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The Grand Canyon became an official national monument in 1908 and a national park in 1919.
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4276:
Solder, John E.; Beisner, Kimberly R.; Anderson, Jessica; Bills, Don J. (August 1, 2020).
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were a cultural group occupying an area to the southeast of the Grand Canyon, between the
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The Grand Canyon is part of the Colorado River basin, which has developed over the past 70
8:
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6717:"Grand Canyon News Release â Fire Managers Prepare to Implement Several Prescribed Fires"
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3471:. Logan, Utah, USA: Utah State University Cooperative Extension Service. pp. 24â28.
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2377:, is a particularly abundant inhabitant of the piĂąon-juniper and ponderosa pine forests.
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1944:
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1696:, a nitrate precursor, by 40% The plant shut down completely in 2019. Emissions from the
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watchtowers, though, with four levels, it is significantly taller than historical towers.
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The base level and course of the Colorado River (or its ancestral equivalent) changed 5.3
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7253:
6993:(2nd ed.). Lakewood, Colorado: National Park Service Air Resources Division. 2002.
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6221:
4997:"Rim to River and Inner Canyon Trails â Nature, Culture and History at the Grand Canyon"
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Rafting, hiking, running, and helicopter tours are also popular in the canyon area. The
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Rafters in the Grand Canyon pass one of the rapids of the (mud-)"colored" Colorado River
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was superintendent of an expedition to survey a wagon road along the 35th parallel from
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2770:, Thomas M. Myers, a journalist and author, documents every death in the Grand Canyon.
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2176:, a threatened species, inhabits the desert scrublands in the western end of the park.
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2098:(snails). Twenty-six species of terrestrial gastropods have been identified, primarily
1903:
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Canyon region. At 95% of sites, maximum observed uranium concentrations were below the
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Baaj Nwaavjo I'tah Kukveni â Ancestral Footprints of the Grand Canyon National Monument
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5483:"Louis Boucher: Canadian Guide of the Grand Canyon | Canadian Cowboy Country Magazine"
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4732:"The Route of James O. Pattie on the Colorado in 1826: A Reappraisal by A. L. Kroeber"
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3819:
2287:
sites are plentiful along the steep canyon walls. Also, several critically endangered
1448:." It consists of 4 stories, with a gift shop and restaurant located inside the hotel.
532:
in 2012, she suggested that the western part of the Grand Canyon could be as old as 70
12079:
11643:
11280:
11267:
10438:
10375:
9940:
9902:
9892:
9862:
9857:
9842:
9822:
9659:
9306:
9082:
9052:
9023:
8915:
8885:
8652:
8627:
8526:
8321:
7697:
7689:
7628:
7616:
7608:
7532:
7273:
7265:
7088:
6947:
6939:
6435:
6348:
6306:
6251:
6233:
5756:
5722:
5688:
5645:
5190:"Oramel G. Howland (1833â1869) Seneca B. Howland (1843â1869) William Dunn (? â 1869)"
5062:
4710:
4699:
4662:
4605:
4527:
4398:
4319:
4307:
4056:
4048:
3956:
3870:
3858:
3850:
3669:
3632:
3498:
3444:
3356:
3247:
3127:
3028:
2589:
2435:
2398:
2394:
2288:
2240:
2200:
2126:
1974:
1891:
1602:
Smoke from prescribed fires on the South Rim, as seen from Yavapai Point, April 2007.
1502:
1415:
1306:
1162:: Stanton made new boats and proceeded to explore the Colorado all of the way to the
792:
720:
The flow of groundwater in the Grand Canyon region is influenced in multiple ways by
596:
528:
499:
8425:
8009:
7945:
7548:"Climate Change Threatens Colorado River And the Water Supply for 40 Million People"
7285:
7236:
6959:
6844:
6690:
6664:
6638:
6573:
5953:"Lake Powell water level: Feds announce measures to help Glen Canyon Dam hydropower"
5572:
4068:
2588:; the center and the road are closed in winter months. On the Hualapai reservation,
1704:
scrubbers, but was instead shut down in 2005, completely eliminating its emissions.
11040:
10762:
10335:
10235:
9887:
9867:
9852:
9827:
9694:
9669:
9664:
9634:
9619:
9614:
9546:
9490:
9413:
9376:
9047:
7885:
7681:
7598:
7518:
7261:
7257:
6931:
6786:. Interagency Monitoring of Protected Visual Environments (IMPROVE). Archived from
6241:
6225:
5921:
5512:
5155:"Powell's 1869 Journey Down the Green and Colorado Rivers â Utah Geological Survey"
4456:
4386:
4297:
4038:
3948:
3842:
3677:
3661:
3545:
3434:
3329:
3288:
3191:
3020:
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2924:
2918:
2835:
2751:
2483:
2414:
2406:
2362:
2280:
2216:
2196:
2134:
1940:
1936:
1917:
1654:
1649:
established the Grand Canyon Visibility Transport Commission (GCVTC) to advise the
1479:
1455:
1225:
1056:
887:
776:
612:
556:
519:
411:
352:
341:
8375:
8179:
7720:"Grand Canyon National Park Settles On Plan To Replace Transcanyon Water Pipeline"
6879:"Will power plant's closure help clear the air, restore the view of Grand Canyon?"
5375:. United States Geological Survey. Geological Survey Bulletin 1508. Archived from
5124:
4965:
4497:
3580:
2921:â gorge in northeastern Pennsylvania also known as the "Pennsylvania Grand Canyon"
2675:
2373:. There are a variety of snakes and lizards here, but one species of reptile, the
12048:
11751:
11310:
11291:
11172:
11167:
10731:
10683:
10577:
10448:
10400:
10380:
10325:
10240:
10222:
10217:
10145:
9917:
9882:
9649:
9198:
9032:
8958:
8778:
8725:
8538:
5355:
4625:
3229:
3105:
2965:
2709:
2614:
2350:
2327:
2260:
2212:
2179:
Some of the common insects found at elevations above 2,000 feet (610 m) are
2130:
1879:
1806:
1707:
1313:
1283:
1212:
867:
780:
721:
616:
345:
48:
8755:
6935:
4841:
2548:
10927:
10860:
10602:
10517:
10473:
10350:
10301:
10072:
10031:
9912:
9689:
9629:
9203:
9150:
9109:
9018:
8551:"Navajo Nation Votes Down Controversial Hotel and Tram Project at Grand Canyon"
7312:
6229:
4390:
4302:
4277:
2807:
2783:
2498:
2447:
2431:
2188:
1802:
1757:
1508:
1440:
1433:
1343:
1299:
1245:
1208:
1069:
1041:
898:
Hopi communities, the Grand Canyon was the location humankind arose out of the
725:
650:
432:
337:
291:
274:
54:
5422:"Quest for the pillar of gold : The mines and miners of the Grand Canyon"
3196:
1598:
1399:
12107:
11950:
11873:
11591:
11248:
10507:
10443:
10370:
10365:
10355:
10259:
9922:
9877:
9644:
9604:
9087:
9062:
9042:
8963:
8953:
8948:
8925:
8759:
8718:
8316:
8264:
8220:
8174:
8126:
8087:
8043:
8004:
7940:
7880:
7693:
7612:
7269:
6943:
6237:
5649:
4311:
4052:
3960:
3925:
Flowers, R. M.; Wernicke, B. P.; Farley, K. A. (May 1, 2008).
3854:
3673:
3575:
3448:
3032:
2949:
2858:
2849:
2479:
2382:
2248:
2244:
1990:
1978:
1928:
1913:
1838:
1833:
1798:
1642:
from forest fires and vehicle emissions, also contribute to a lesser extent.
1312:
The canyon's ecosystem was permanently changed after the construction of the
1267:
1197:
1159:
1094:
1055:
to the Colorado River. He led a small party of men in search of water on the
1023:
1007:
999:
875:
801:
552:
322:
253:
240:
7603:
7578:
4730:
Kroeber, A. L.; Kroeber, Clifton B.; Euler, R. C.; Schreoder, A. H. (1964).
4426:"LC Linked Data Service: Authorities and Vocabularies (Library of Congress)"
4043:
4018:
3846:
3549:
2719:
The wreckage of both planes fell into the eastern portion of the canyon, on
2556:
2031:
The insect species commonly found in the river corridor and tributaries are
1719:
919:
11983:
11100:
10855:
10767:
10607:
10512:
10204:
9955:
9711:
9639:
9289:
National Register of Historic Places listings in Grand Canyon National Park
9165:
9160:
9124:
9092:
9067:
9037:
8920:
8582:"How Many People Die in the Grand Canyon and is it Becoming Too Dangerous?"
7701:
7643:"Park Statistics â Grand Canyon National Park (U.S. National Park Service)"
7620:
7277:
7055:
William C. Malm, Air Resources Division, National Park Service (May 1999).
6951:
6255:
4060:
3862:
2864:
2720:
2712:
2386:
2323:
2264:
2235:
2192:
2111:
1948:
1875:
1639:
1466:
943:
771:
568:
471:
3681:
27:
Steep-sided canyon carved by the Colorado River in Arizona, United States
11708:
11455:
11177:
11141:
10726:
10701:
10668:
10663:
10653:
10648:
10617:
10527:
10488:
10478:
10385:
10248:
10230:
10209:
9208:
9172:
9097:
9072:
9057:
9013:
8998:
8910:
8744:
7523:
7498:
3355:(reprint, illustrated ed.). Albuquerque, NM: UNM Press. p. 11.
2724:
2598:
2482:, grow in this sub-alpine climate. Mountain lions, Kaibab squirrels, and
2443:
2439:
2346:
2220:
2119:
1810:
1571:
1563:
1421:
1336:
1229:
1219:
1201:
981:
693:
689:
415:
395:
10041:
5657:
5633:
4747:
4731:
3349:
Mitchell, Douglas R.; Lippert, Dorothy; Brunson-Hadley, Judy L. (2004).
1923:
1553:
688:
Groundwater flow in the Grand Canyon region is an active area of study.
390:
382:
371:
11618:
11375:
10592:
10582:
10557:
10463:
10395:
10119:
10098:
9970:
9960:
9399:
9213:
6144:"Uranium mine near Grand Canyon permitted by court, despite mining ban"
3439:
3415:"A preâ21st century history of ideas on the origin of the Grand Canyon"
3414:
3334:
3309:
3293:
3268:
2475:
2467:
2402:
2390:
2115:
2099:
2095:
2044:
1956:
1935:
The three most common amphibians in these riparian communities are the
1623:
1608:
1474:
1451:
1328:
1193:
1135:
1131:
1015:
403:
356:
10189:
6749:"Project MOHAVE (Measurement of Haze and Visual Effects) Final Report"
4626:"Discovery of the Athabascan Origin of the Apache and Navajo Language"
2302:
1668:
11330:
10658:
10587:
10183:
10171:
9229:
7754:"Grand Canyon restricts water use after water pipeline damaged again"
3952:
3665:
3024:
2459:
2358:
2315:
2284:
2256:
2224:
2208:
2184:
2154:
2060:
2048:
2036:
2016:
1862:
1318:
820:
419:
399:
8771:
6302:
The Grand Canyon: An Encyclopedia of Geography, History, and Culture
6206:"An assessment of uranium in groundwater in the Grand Canyon region"
5543:"Charles Spencer collection, 1910â1920 Spencer (Charles) collection"
5421:
4019:"Apatite 4He/3He and (U-Th)/He Evidence for an Ancient Grand Canyon"
1465:
Verkamp's Curios, which stands next to the Hopi House, was built by
359:
to it. The first European known to have viewed the Grand Canyon was
10177:
10105:
9368:
9234:
7497:
Xiao, Mu; Udall, Bradley; Lettenmaier, Dennis P. (September 2018).
6113:"Arizona continues to push for new uranium mines near Grand Canyon"
6012:"United States Court of Appeals for the Ninth Circuit No. 14-17350"
4145:"Debate over the origins of the Grand Canyon - Albuquerque Journal"
2572:
Indian Reservation. About 90% of tourists visit the South Rim from
2569:
2506:
2366:
2268:
2180:
2173:
2162:
2091:
2087:
2072:
2068:
2008:
1986:
1323:
1143:
1122:
Walter, and collected provisions for ten months. They set out from
863:
824:
808:
705:
701:
314:
4496:. Hewit Institute, University of Northern Colorado. Archived from
1274:
Roosevelt along with other members of his conservation group, the
526:
million years ago. In a subsequent study published in the journal
386:
The Grand Canyon from an airplane, with the Colorado River visible
10896:
10133:
10091:
9403:
8827: â view looking southwesterly, showing North Rim and Canyon.
6415:
National Park Service Rustic: Historic Architecture of California
6341:
Architecture in the Parks: National Historic Landmark Theme Study
5607:
Glen Canyon National Recreation Area (U.S. National Park Service)
4966:"The Colorado Exploring Expedition (Ives Expedition) (1857â1858)"
4524:
Secrets in The Grand Canyon, Zion and Bryce Canyon National Parks
2471:
2342:
are found at the park's higher elevations on the Kaibab Plateau.
1996:
1966:
1965:
may have disappeared from the park in the late 20th century, and
1959:
is one species that uses the river corridor as a winter habitat.
1895:
1631:
1567:
1235:
958:
831:
811:
lived to the west of the Grand Canyon, between 500 and 1200
515:
511:
deposits found on the walls of nine caves throughout the canyon.
508:
497:
million years ago. The study, which was published in the journal
295:
216:
58:
1586:
weather radio or the official National Weather Service website.
1040:'s photograph of the Grand Canyon, taken in 1872 as part of the
972:
were two Spanish priests who, with a group of Spanish soldiers,
559:
on the Rim. There is a gap of about a billion years between 1.75
10152:
10112:
8835:
7352:. United States Environmental Protection Agency. June 6, 2001.
7152:. United States Environmental Protection Agency. July 6, 2005.
6801:
6612:
3269:"Geomorphic constraints on the age of the western Grand Canyon"
2410:
2272:
2056:
2040:
2024:
2012:
2004:
2000:
1982:
1970:
1850:
1846:
1769:
1761:
1459:
1147:
1114:
became probably the first geologist to visit the Grand Canyon.
1003:
903:
544:
million years ago, and the "Eastern Grand Canyon" was cut 15â25
427:
of the early geologic history of the North American continent.
287:
10165:
8601:"This Grim Map Shows How People Have Died at the Grand Canyon"
6347:(1st ed.). Washington, D.C.: Department of the Interior.
3818:
Polyak, Victor; Hill, Carol; Asmerom, Yemane (March 7, 2008).
2015:
are also present but are much rarer. Ungulate species such as
696:. The composition of the earth in a given area determines its
375:
Image of the Grand Canyon and surrounding area taken from the
11959:
8797:
4017:
Flowers, R. M.; Farley, K. A. (December 21, 2012).
3348:
3307:
3047:"Pueblos join forces to oppose Grand Canyon Escalade Project"
2455:
2451:
2354:
2319:
2032:
816:
713:
555:
at the bottom of the Inner Gorge to the 270-million-year-old
466:
8376:"Operating Hours & Seasons â Grand Canyon National Park"
7813:"Groundwater Decline and Depletion | U.S. Geological Survey"
7178:
Mike Sundblom, Arizona Department of Environmental Quality.
6741:
4729:
750:
582:
million years ago, intermittent sediments began to form the
444:) is limited during the winter season due to road closures.
10126:
8739:
7171:
7120:
6203:
4809:"Canyon Club hosts presentation on Crossing of the Fathers"
3637:"The California River and its role in carving Grand Canyon"
2928:
2510:
2314:
The conifer forests provide habitat for 52 mammal species.
2103:
2064:
2052:
1765:
1583:
1428:. In 1911, the Kolb brothers filmed their journey down the
1253:
871:
847:
770:
were a Native American culture centered on the present-day
717:
Uinkaret-Kanab, Marble-Shinumo, Cataract, and Blue Spring.
571:
indicates a long period for which no deposits are present.
4275:
4250:. U.S. Department of the Interior U.S. Geological Survey.
1679:
In the early 1990s, studies indicated that emissions of SO
692:
forms when rain soaks down into the earth and reaches the
11844:
Woodrow Wilson School of Public and International Affairs
2702:
2339:
2310:
searching for water at Grand Canyon National Park in 2018
2307:
7413:. U.S. National Park Service. March 2012. Archived from
7310:
5987:"Demand for uranium threatens Grand Canyon biodiversity"
5904:"Three-Day Grand Canyon Flood Aims to Restore Ecosystem"
4362:
2227:
can be found in the desert scrub and higher elevations.
1849:
species found along the Colorado River corridor, 18 are
7499:"On the Causes of Declining Colorado River Streamflows"
6499:
Statements on Architectural and Historical Significance
6468:"Verkamp's building reopens with exhibits on community"
3461:
2298:
Red-tailed Hawk flying at the south rim of Grand Canyon
1653:
on strategies for protecting visual air quality on the
7233:
6384:"National Park Service: Rustic Architecture 1916â1942"
5420:
Billingsley, George; Spamer, Earle (January 1, 1997).
3002:
2023:
frequent the river corridor. Since the removal of 500
431:
The uplift of the Colorado Plateau is uneven, and the
8457:"Where 2 Rivers Meet, Visions for Grand Canyon Clash"
7242:
Journal of the Air & Waste Management Association
6916:
Journal of the Air & Waste Management Association
3988:"New research revives debate over Grand Canyon's age"
3924:
3595:
3244:
Carving Grand Canyon: Evidence, Theories, and Mystery
2071:. Numerous species of spiders and several species of
1630:. Airborne soils originate with windy conditions and
11944:
Woodrow Wilson and the Birth of the American Century
7496:
4907:. Cambridge: Harvard University Press. p. 100.
4775:"New light on Pattie and the southwestern fur trade"
3120:
Kiver, Eugene P.; Harris, David V. (June 15, 1999).
2797:
2640:
A 6-minute video of a flight over the Grand Canyon (
7094:. Western Regional Air Partnership. June 10, 1996.
6175:"Court greenlights uranium mine in national forest"
6082:"Grand Canyon Uranium Decisions Loom Large in 2017"
4939:. El Centro, Calif.: Imperial Irrigation District.
3075:
University of Utah Press. Salt Lake City, UT: 2000.
2458:, along with several species of perennial grasses,
1692:
SOFA burners in 2009â2011, reducing emissions of NO
1215:(17th of John Lee's 19 wives), James Simpson Emmett
878:, or DinĂŠ, live in a wide area stretching from the
853:
By the time of the arrival of Europeans in the 16th
514:In another 2008 study, Rebecca Flowers reported on
10871:Metropolitan Water District of Southern California
8573:
8543:
7747:
7745:
7235:
7208:2019 Visibility Protection Under the Clean Air Act
6909:
6778:
6776:
6434:. Charleston, South Carolina: Arcadia Publishing.
5061:. University of Oklahoma Press. pp. 236â238.
4698:
4597:
4574:
4455:
4364:
3926:
3889:
3887:
3352:Ancient Burial Practices in the American Southwest
1172:
909:
355:considered the Grand Canyon a holy site, and made
7411:"Grand Canyon National Park Fire Management Plan"
7211:. SJ Quinney College of Law, University of Utah.
6501:. National Park Service, Western Regional Office.
6431:Visiting the Grand Canyon: Views of Early Tourism
5419:
4454:
4203:"The Pressure on Groundwater in the Grand Canyon"
3817:
3232:National Park Service Retrieved November 17, 2009
1541:Canyon region are generally dry, but substantial
846:. The Sinagua may have been ancestors of several
595:, which contains abundant geological evidence of
301:The canyon and adjacent rim are contained within
12105:
11830:Woodrow Wilson International Center for Scholars
8622:Ghiglieri, Michael P.; Myers, Thomas M. (2001).
8579:
7577:Milly, P. C. D.; Dunne, K. A. (March 13, 2020).
7440:"Grand Canyon National Park Climate Action Plan"
6845:"Park Air Profiles â Grand Canyon National Park"
5373:The Geologic Story of Colorado National Monument
4650:
4604:. Tucson, Arizona: University of Arizona Press.
3455:
790:, suggests their emergence was around 1200
603:also were deposited in non-marine environments.
8486:
8484:
8306:
8304:
8302:
8300:
8298:
8296:
8294:
8254:
8252:
8250:
8114:
7994:
7992:
7990:
7930:
7742:
6908:Brewer, Patricia; Moore, Tom (September 2009).
6773:
4628:. Watkins, Thayer â San Jose State University.
3884:
3609:. National Park Service; US Dept. of Interior.
2230:
1801:influences the western sections of the canyon,
1756:There are approximately 1,737 known species of
1672:Natural fog sometimes fills the canyon, during
623:of the Colorado River for present conditions).
325:. The surrounding area is contained within the
11901:United States one-hundred-thousand-dollar bill
8621:
8592:
8454:
7988:
7986:
7984:
7982:
7980:
7978:
7976:
7974:
7972:
7970:
7928:
7926:
7924:
7922:
7920:
7918:
7916:
7914:
7912:
7910:
7870:
7868:
7866:
7864:
7862:
7860:
7858:
7751:
5631:
3896:"60-Million-Year Debate on Grand Canyon's Age"
3266:
3088:Jeffrey Norton Publishers. Guilford, CT: 1995.
1236:Federal protection: National Monument and Park
684:, represents ground water reaching the surface
11891:Woodrow Wilson National Fellowship Foundation
10912:
10057:
9384:
8851:
8349:. Northern Arizona University. Archived from
8077:
8075:
8073:
7856:
7854:
7852:
7850:
7848:
7846:
7844:
7842:
7840:
7838:
7713:
7711:
7379:"Kaibab National Forest Fire Management Plan"
6589:
6587:
6110:
5778:"The Man Who Tried to Claim the Grand Canyon"
4692:
4690:
4240:
4016:
2086:Eleven aquatic and 26 terrestrial species of
1856:
9284:List of trails in Grand Canyon National Park
8481:
8291:
8247:
8164:
8162:
8160:
8158:
8156:
6691:"Grand Canyon National Park Climate Summary"
6665:"Grand Canyon National Park Climate Summary"
6639:"Grand Canyon National Park Climate Summary"
5687:. Salt Lake City: University of Utah Press.
5573:"The Tunnels In Mooney Falls, Havasu Canyon"
4577:The Cohonina culture of northwestern Arizona
4566:
4241:Knight, Jacob E.; Huntoon, Peter W. (2022).
3759:"Study Says Grand Canyon Older Than Thought"
3565:
3563:
3561:
3559:
3527:
3184:"A deeper understanding of the Grand Canyon"
2898:List of trails in Grand Canyon National Park
2605:has no paved roads and no visitor services.
2165:species live in the desert scrub community.
1805:vegetation covers the eastern sections, and
783:for "enemy ancestors" or "alien ancestors".
470:Rockfalls in recent times, along with other
406:true-color satellite image. Scale 1:450,000.
340:through layer after layer of rock while the
11579:U.S. Federal Board for Vocational Education
11444:National Advisory Committee for Aeronautics
10866:International Boundary and Water Commission
8798:Grand Canyon Chamber & Visitor's Bureau
8344:"Executive Summary of Grand Canyon Tourism"
8210:
8208:
8206:
8204:
7967:
7907:
6907:
5721:. New York: Princeton Architectural Press.
5426:Grand Canyon Association (Monograph No. 10)
5403:National Geographic Visitor Center, Arizona
4651:Courlander, Harold; Harmon, Daniel (1971).
3631:
3119:
2998:
2996:
2413:have been identified in these forests. The
1912:. Endangered fish in the river include the
1688:visibility. The plant also installed low-NO
599:sand dune deposition. Several parts of the
10919:
10905:
10064:
10050:
9391:
9377:
8858:
8844:
8226:"Insects, Spiders, Centipedes, Millipedes"
8070:
7835:
7708:
7576:
7048:
6584:
6427:
6045:
6043:
6019:United States Courts for the Ninth Circuit
5755:. Grand Canyon, Arizona: Northland Press.
5746:
5744:
5742:
5740:
5738:
5184:
5182:
5180:
5029:Report Upon the Colorado River of the West
4687:
3073:Navajo Places. History, Legend, Landscape.
2893:List of Colorado River rapids and features
2665:
2580:. Further east along the South Rim is the
1444:for a rustic appearance sometimes called "
1134:with the Colorado River, near present-day
410:The Grand Canyon is a river valley in the
11553:United States Grain Standards Act of 1916
10071:
8728: (archived August 30, 2010) from the
8646:
8153:
7782:
7717:
7602:
7522:
7384:. U.S. Forest Service. January 31, 2011.
6872:
6870:
6511:
6331:
6299:Moore, Randy; Witt, Kara Felicia (2018).
6298:
6245:
5870:
5864:
4581:. University of Illinois Press. pp.
4301:
4236:
4234:
4194:
4042:
3985:
3979:
3894:Wilford, John Noble (November 29, 2012).
3750:
3556:
3438:
3408:
3406:
3333:
3292:
3235:
3195:
3039:
2425:
1014:, crossed the location that would become
942:In September 1540, under orders from the
938:can be seen overlooking the Grand Canyon.
12159:First 100 IUGS Geological Heritage Sites
11860:Celestial Sphere Woodrow Wilson Memorial
8989:Grand CanyonâParashant National Monument
8831:Grand Canyon â Street View â Google Maps
8745:Grand Canyon Backcountry Use Areas â Map
8418:
8201:
8031:
7304:
6496:
6337:
6172:
6166:
6055:United States Department of the Interior
6006:
6004:
5980:
5978:
5842:"History of the Boone and Crockett Club"
5712:
5710:
5708:
5706:
5704:
5243:
5125:"Shipping a boat over land west in 1869"
5058:Westering Man: The Life of Joseph Walker
4572:
4517:
4515:
4334:"Mystery of Grand Canyon's water supply"
4176:"The Hypothesis of Differential Erosion"
3719:
3688:
3267:Darling, Andrew; Whipple, Kelin (2015).
3177:
3175:
3086:Navajo Place Names. An observer's guide.
2993:
2931:, one of the largest in the Solar System
2674:
2628:
2603:Grand CanyonâParashant National Monument
2555:
2547:
2301:
2293:
2234:
2122:species have been recorded in the park.
1922:
1832:
1779:
1723:Grand Canyon Climate Summary Chart (NPS)
1718:
1667:
1597:
1552:
1473:
1398:
1342:
1258:
1239:
1176:
1088:
1032:
918:
749:
675:
465:
457:
389:
381:
370:
311:Grand CanyonâParashant National Monument
12054:Jefferson Literary and Debating Society
11019:Louis Brandeis Supreme Court nomination
8785:Grand Canyon Explorer: History timeline
8598:
8588:from the original on February 19, 2017.
7801:from the original on February 27, 2022.
7539:
7327:from the original on September 25, 2012
7198:
6978:
6901:
6580:from the original on February 10, 2016.
6197:
6173:Grzincic, Barbara (February 23, 2022).
6040:
5997:from the original on February 26, 2017.
5846:University of Montana Mansfield Library
5805:
5803:
5775:
5753:Mary Colter, builder upon the red earth
5750:
5735:
5719:Mary Colter, architect of the Southwest
5682:
5409:from the original on February 19, 2016.
5268:from the original on September 26, 2020
5212:
5177:
5093:
5054:
5048:
4696:
4595:
4589:
4436:from the original on September 20, 2020
4083:"Grand Canyon as old as the dinosaurs?"
3918:
3893:
3781:
3756:
3725:
3694:
3223:Geologic Formations of the Grand Canyon
3173:
3171:
3169:
3167:
3165:
3163:
3161:
3159:
3157:
3155:
3115:
3113:
2534:
2509:. The wettest areas support sedges and
991:
862:century, occupying an area the size of
14:
12106:
11773:1910 New Jersey gubernatorial election
11183:American Commission to Negotiate Peace
8671:
8502:from the original on December 18, 2010
8448:
8406:from the original on November 23, 2023
7653:from the original on February 28, 2015
7570:
7545:
7434:
7432:
7227:
7204:
6867:
6815:"Air Quality at Grand Canyon National"
6671:from the original on September 2, 2012
6645:from the original on September 2, 2012
6478:from the original on February 13, 2023
6406:
5852:from the original on February 25, 2017
5685:Dave Rust : a life in the canyons
5432:from the original on February 13, 2023
5122:
5116:
5075:from the original on February 13, 2023
5007:from the original on September 4, 2022
4900:
4836:
4834:
4632:from the original on November 12, 2014
4269:
4231:
4210:UC Davis Center for Watershed Sciences
3811:
3738:from the original on February 13, 2023
3707:from the original on February 13, 2023
3645:Geological Society of America Bulletin
3603:"Winter on the North Rim (off-season)"
3412:
3403:
3241:
3216:
3182:Witze, Alexandra (February 26, 2019).
2434:. Spruce-fir forests characterized by
1841:perched on a cliff in the Grand Canyon
1746:
1387:
1347:View of Grand Canyon from Mather Point
1290:lands and redesignated the preserve a
1204:, Charles Spencer, D.W. "James" Mooney
12139:Landforms of Coconino County, Arizona
11586:United States Railroad Administration
10900:
10045:
9372:
8839:
8611:from the original on August 20, 2017.
7764:from the original on December 9, 2022
7665:
7546:Childs, Jan Wesner (March 17, 2020).
7490:
7359:from the original on January 18, 2017
7000:from the original on January 16, 2019
6876:
6574:"Grand Canyon Desert View Watchtower"
6544:"History of the Grand Canyon Railway"
6412:
6364:from the original on January 13, 2017
6141:
6135:
6079:
6073:
6001:
5985:Carus, Felicity (February 17, 2011).
5984:
5975:
5950:
5944:
5926:Arizona Department of Water Resources
5901:
5716:
5701:
5135:from the original on December 3, 2022
4929:
4911:from the original on November 5, 2023
4550:. USDA Forest Service. Archived from
4521:
4512:
4356:
4200:
3906:from the original on January 21, 2013
3181:
2978:Gran Caùón or Gran Caùón del Colorado
890:, Canada, who migrated after the 11th
842:, between approximately 500 and 1425
815:. The Cohonina were ancestors of the
190:4 to 18 mi (6.4 to 29.0 km)
11404:Federal Trade Commission Act of 1914
11118:Occupation of the Dominican Republic
10808:Glen Canyon National Recreation Area
9398:
9253:Powell Geographic Expedition of 1869
8672:Ackley, Madeline (October 3, 2020).
8624:Over the Edge: Death in Grand Canyon
7671:
7182:. Western Regional Air Partnership.
7159:from the original on August 26, 2014
6800:Note: Air quality as represented by
6619:from the original on January 2, 2007
6595:"Grand Canyon National Park Weather"
6514:"Ride the Train to the Grand Canyon"
6512:Wadzinski, Gloria (August 2, 2021).
6111:Curtis Spicer (September 24, 2015).
5800:
5634:"Zane Grey and James Simpson Emmett"
5480:
5249:
5165:from the original on August 13, 2022
5147:
5025:
4994:
4946:from the original on August 26, 2022
4772:
4482:
4476:participating institution membership
4423:
4219:from the original on August 26, 2022
4142:
4111:
3998:from the original on October 4, 2022
3986:Achenbach, Joel (January 26, 2014).
3496:
3478:from the original on August 26, 2022
3152:
3110:
3049:. Navajo Times. September 11, 2014.
2768:Over the Edge: Death in Grand Canyon
2687:
2679:Grand Canyon rescue helicopter, 1978
2670:
2353:, Utah agave, banana and narrowleaf
1266:postcard, The Towering Cliffs above
914:
827:peoples who inhabit the area today.
145:
112:
79:
57:flowing through the Grand Canyon in
12144:Landforms of Mohave County, Arizona
11788:1916 Democratic National Convention
11778:1912 Democratic National Convention
11682:Birthplace and Presidential Library
11477:Federal Employees' Compensation Act
11324:Board of Mediation and Conciliation
9258:1956 Grand Canyon mid-air collision
8647:Ghiglieri, Michael Patrick (2001).
8580:The Active Times (August 9, 2016).
8561:from the original on April 25, 2021
8455:Adam Nagourney (December 3, 2014).
8382:from the original on March 3, 2011.
7823:from the original on March 25, 2022
7752:O'Sullivan, Serena (May 23, 2019).
7686:10.1146/annurev.publhealth.21.1.223
7456:from the original on June 11, 2019.
7429:
7391:from the original on March 27, 2014
7186:from the original on March 31, 2012
6693:. Western Regional Climate Center.
6667:. Western Regional Climate Center.
6641:. Western Regional Climate Center.
6613:"Flagstaff Weather Forecast Office"
6280:from the original on August 9, 2023
5815:Northern Arizona University Library
5553:from the original on April 19, 2022
5481:Drew, Dr Daryl (February 1, 2016).
5288:"John Wesley Powell's Undertakings"
5218:
5032:. U.S. Government Printing Office.
4831:
4754:from the original on March 12, 2022
4257:from the original on April 19, 2022
4173:
4112:Amos, Jonathan (January 26, 2014).
2750:South Kaibab Trail at Cedar Ridge.
2701:On the morning of June 30, 1956, a
2694:1956 Grand Canyon mid-air collision
1022:(later operated by, and named for,
761:
24:
11507:Fraudulent Advertising Act of 1916
11398:Emergency Internal Revenue Tax Act
10926:
10846:Colorado River Board of California
10818:Lake Mead National Recreation Area
8740:Grand Canyon National Park Service
8469:from the original on April 3, 2015
8436:from the original on March 8, 2013
7649:. Grand Canyon National Park, AZ.
7558:from the original on June 24, 2022
7478:from the original on March 6, 2022
7121:"Western Regional Air Partnership"
7036:from the original on June 24, 2022
6966:from the original on June 24, 2022
6877:Nicla, Andrew (October 18, 2019).
6855:from the original on June 24, 2022
6825:from the original on June 24, 2022
6697:from the original on July 26, 2010
6338:Harrison, Laura Soulliere (1986).
6185:from the original on June 30, 2022
6142:Crane, Steve (February 23, 2022).
6061:from the original on June 30, 2022
6028:from the original on July 28, 2018
5906:. Associated Press. Archived from
5871:Denetclaw, Pauly (March 1, 2022).
5776:Sowards, Adam M. (July 31, 2019).
5328:from the original on June 21, 2022
5231:from the original on March 8, 2022
4882:from the original on June 30, 2022
4789:from the original on June 21, 2022
4182:from the original on June 22, 2011
4155:from the original on July 11, 2022
4124:from the original on July 11, 2022
4089:. December 3, 2012. Archived from
3967:from the original on June 23, 2022
3799:from the original on June 23, 2022
3757:Wilford, John (February 6, 2008).
3613:from the original on March 3, 2011
3369:from the original on May 17, 2016.
3204:from the original on June 23, 2022
3140:from the original on June 23, 2022
2734:) by en route ground controllers.
2650:Grand Canyon National Park Airport
2110:largest lizards in the canyon are
1817:barrier to some species, like the
1793:Grand Canyon Clouds time lapse VP8
1026:). He also acted as an advisor to
894:century. In the mythology of some
174:Approx. 2,600 ft (800 m)
25:
12170:
11563:Wildlife Game Refuges Act of 1916
11518:National Park Service Organic Act
11416:Glacier National Park Act of 1914
11215:Migratory Bird Treaty Act of 1918
10963:President of Princeton University
8700:
8684:from the original on May 30, 2024
7730:from the original on July 1, 2022
7292:from the original on May 30, 2024
7215:from the original on May 27, 2022
7101:from the original on May 17, 2012
7020:"Grand Canyon Breathtaking views"
6987:Air Quality in the National Parks
6889:from the original on July 2, 2022
6729:from the original on May 29, 2010
6554:from the original on July 8, 2022
6524:from the original on July 3, 2022
6448:from the original on July 8, 2022
6394:from the original on July 2, 2022
6319:from the original on July 8, 2022
6154:from the original on July 4, 2022
6123:from the original on May 30, 2024
6092:from the original on July 2, 2022
5963:from the original on June 6, 2022
5932:from the original on July 2, 2022
5883:from the original on July 1, 2022
5821:from the original on July 8, 2022
5788:from the original on July 8, 2022
5664:from the original on July 8, 2022
5613:from the original on July 8, 2022
5583:from the original on July 8, 2022
5523:from the original on July 8, 2022
5493:from the original on May 24, 2022
5462:from the original on July 8, 2022
5452:"William Wallace Bass Collection"
5298:from the original on May 30, 2024
5123:Stojka, Andre (October 7, 2015).
5104:from the original on May 30, 2024
5036:from the original on July 8, 2022
4976:from the original on July 8, 2022
4852:from the original on May 19, 2022
4819:from the original on May 28, 2022
4779:Southwestern Historical Quarterly
4675:from the original on May 30, 2024
4405:from the original on July 1, 2022
4344:from the original on July 1, 2022
3769:from the original on May 17, 2013
3509:from the original on May 30, 2024
3381:"History of the Colorado Plateau"
3084:Wilson, Alan with Gene Dennison.
3053:from the original on June 1, 2016
2773:
1714:
1335:In 2009, U.S. Interior Secretary
615:). This uplift has steepened the
474:, have further widened the canyon
363:from Spain, who arrived in 1540.
125:Location within the United States
12088:
12087:
11609:Acadia National Park Act of 1919
10416:Gulf of California/Sea of Cortez
10188:
10182:
10176:
10170:
10164:
10025:
9345:Grand Canyon: The Hidden Secrets
9279:Grand Canyon Backcountry Camping
8865:
8749:
8713:
8665:
8640:
8615:
8514:
8386:
8368:
8336:
8315: This article incorporates
8310:
8263: This article incorporates
8258:
8219: This article incorporates
8214:
8173: This article incorporates
8168:
8125: This article incorporates
8120:
8086: This article incorporates
8081:
8042: This article incorporates
8037:
8003: This article incorporates
7998:
7939: This article incorporates
7934:
7879: This article incorporates
7874:
7805:
7776:
7635:
7460:
7403:
7371:
7339:
7139:
7127:from the original on May 1, 2012
7113:
7081:
7012:
6837:
6807:
6709:
6683:
6657:
6631:
6605:
6597:. April 27, 2016. Archived from
6566:
6536:
6518:Grand Canyon National Park Trips
6505:
6490:
6460:
6421:
6376:
6080:Clark, Roger (January 6, 2017).
5638:Brigham Young University Studies
4114:"Grand Canyon 'formed recently'"
3574: This article incorporates
3569:
2842:
2828:
2814:
2800:
2759:
2739:
2518:
1869:
1683:, a sulfate precursor, from the
1615:can have a considerable impact.
1282:, which in turn lobbied for the
1097:, second Powell Expedition, 1872
746:History of the Grand Canyon area
454:Geology of the Grand Canyon area
144:
137:
111:
104:
78:
71:
47:
11793:1916 U.S. presidential election
11783:1912 U.S. presidential election
11709:Summer White House (Harlakenden
11163:Committee on Public Information
11124:Army Appropriations Act of 1916
11053:State of the Union Address 1913
9946:Aztec Land & Cattle Company
9338:The Man Who Walked Through Time
7792:University of California, Davis
7718:Repanshek, Kurt (May 9, 2019).
7468:"State of the Earth in Numbers"
6292:
6262:
6104:
5914:
5895:
5873:"Colorado River, stolen by law"
5833:
5769:
5676:
5632:St. John Stott, Graham (1978).
5625:
5595:
5565:
5535:
5505:
5474:
5444:
5413:
5391:
5361:
5340:
5310:
5280:
5087:
5019:
4988:
4958:
4923:
4894:
4864:
4801:
4766:
4723:
4644:
4618:
4573:McGregor, John Charles (1951).
4540:
4448:
4417:
4326:
4167:
4143:Bush, Mike (February 3, 2014).
4136:
4105:
4075:
4010:
3625:
3530:Journal of Geophysical Research
3521:
3490:
3373:
3342:
3301:
3260:
1173:Settlers in and near the canyon
910:European arrival and settlement
394:Grand Canyon, Arizona, Nevada,
11704:Princeton University president
11699:Boyhood home in South Carolina
10943:President of the United States
10758:Colorado River Storage Project
9352:Grand Canyon: A Different View
9263:Grand Canyon Airlines Flight 6
8787:from 10,000 years ago to 1994.
7674:Annual Review of Public Health
7262:10.1080/10473289.2005.10464759
7205:Reitze, Arnold W. Jr. (2019).
5839:
5683:Swanson, Frederick H. (2007).
4901:Stacey, May Humphreys (1929).
4522:Tufts, Lorraine Salem (1998).
3789:"How Old Is the Grand Canyon?"
3091:
3078:
3065:
2943:
2271:, catclaw acacia, and various
1775:U.S. Fish and Wildlife Service
1593:
1557:Grand Canyon covered with snow
1414:was built during the 1890s by
653:of the canyon were created by
643:lowered the river's base level
626:Weather conditions during the
611:million years ago (during the
567:billion years ago. This large
13:
1:
12124:Canyons and gorges of Arizona
11992:(daughter, acting first lady)
11936:Backstairs at the White House
11854:Woodrow Wilson Junior College
11614:Grand Canyon Park Act of 1919
11421:Legislative Reference Service
11382:Clayton Antitrust Act of 1914
11205:Selective Service Act of 1917
11188:Armistice of 11 November 1918
10753:ColoradoâBig Thompson Project
8906:Grand Canyon Village, Arizona
8651:. Flagstaff, AZ: Puma Press.
7724:www.nationalparkstraveler.org
7320:. U.S. Department of Energy.
6428:Stampoulos, Linda L. (2004).
5902:Myers, A.L. (March 6, 2008).
5751:Grattan, Virginia L. (1992).
4701:Grand Canyon, The Great Abyss
4654:The Fourth World of the Hopis
3607:Operating Hours & Seasons
2986:
2543:
2389:. Additional species such as
2243:in flight, photographed from
2083:, inhabit the riparian zone.
1416:William Owen "Buckey" O'Neill
1182:
947:Francisco VĂĄzquez de Coronado
932:Francisco VĂĄzquez de Coronado
870:live in what is now southern
158:Location within North America
128:Show map of the United States
32:Grand Canyon (disambiguation)
11536:Rural Post Roads Act of 1916
11472:Federal Aid Road Act of 1916
10823:Rocky Mountain National Park
9685:San Francisco Volcanic Field
8825:Grand Canyon 3-D perspective
8803:36 Hours at the Grand Canyon
7057:"Introduction to Visibility"
6615:. National Weather Service.
5094:Chorley, Richard J. (1984).
5003:. Arizona State University.
3465:Rangelands resources of Utah
3413:Ranney, Wayne (April 2014).
3246:. Grand Canyon Association.
2706:Lockheed Super Constellation
2375:mountain short-horned lizard
2231:Upper Sonoran and Transition
1446:National Park Service rustic
1363:Havasupai Tribe v. Provencio
970:Silvestre VĂŠlez de Escalante
966:Francisco Atanasio DomĂnguez
757:granaries at Nankoweap Creek
671:
366:
319:Havasupai Indian Reservation
7:
11746:When a Man Comes to Himself
11662:Mineral Leasing Act of 1920
11657:Merchant Marine Act of 1920
11547:Stock-Raising Homestead Act
11231:Wartime Measure Act of 1918
11129:Council of National Defense
10803:Dead Horse Point State Park
10361:Lower Colorado River Valley
8984:Grand Canyon Forest Reserve
8754:Geographic data related to
6936:10.3155/1047-3289.59.9.1070
6148:Cronkite News â Arizona PBS
5957:Cronkite News â Arizona PBS
5951:Hager, Alex (May 4, 2022).
5848:. Boone and Crockett Club.
5487:Cowboy Country Magazine.com
5252:"Seeking Hard Desert Truth"
4933:The Ives Expedition of 1858
4842:"Lee's Ferry Historic Site"
2883:Grand Canyon Ultra Marathon
2793:
2778:On October 3, 2020, former
2610:Grand Canyon Ultra Marathon
2081:giant desert hairy scorpion
1813:forests grow on both rims.
1355:National Mining Association
1218:Phantom Ranch: David Rust,
637:million years ago when the
377:International Space Station
315:Hualapai Indian Reservation
10:
12175:
12154:Southwestern United States
12119:Grand Canyon National Park
11467:Cotton Futures Act of 1916
11462:Brush Disposal Act of 1916
11387:Cotton Futures Act of 1914
11300:Federal racial segregation
10881:U.S. Bureau of Reclamation
10813:Grand Canyon National Park
10798:Colorado National Monument
8896:Grand Canyon National Park
8692:– via azcentral.com.
8537:February 20, 2015, at the
8496:Grand Canyon National Park
8430:Grand Canyon National Park
8326:Grand Canyon National Park
8274:Grand Canyon National Park
8230:Grand Canyon National Park
8184:Grand Canyon National Park
8136:Grand Canyon National Park
8097:Grand Canyon National Park
8053:Grand Canyon National Park
8014:Grand Canyon National Park
7950:Grand Canyon National Park
7890:Grand Canyon National Park
6230:10.1038/s41598-021-01621-8
5456:Arizona Historical Society
5097:Geomorphology before Davis
4424:Congress, The Library of.
4391:10.1007/s10040-019-02056-2
4303:10.1007/s10040-020-02193-z
3585:Grand Canyon National Park
2871:Grand Canyon National Park
2691:
2566:Grand Canyon National Park
2419:Great Basin spadefoot toad
2145:, western honey mesquite,
1857:Life zones and communities
1828:
1535:
1494:Grand Canyon Railway Depot
1280:National Parks Association
1230:Emery & Ellsworth Kolb
874:and northern Arizona. The
743:
739:
451:
447:
303:Grand Canyon National Park
29:
12067:
12041:
11970:
11909:
11825:Woodrow Wilson Foundation
11801:
11763:
11732:
11674:
11625:Wheat Price Guarantee Act
11568:Flood Control Act of 1917
11438:Locomotive Inspection Act
11290:
11091:
11046:Woman Suffrage Procession
10973:
10934:
10831:
10793:Canyonlands National Park
10780:
10740:
10692:
10626:
10543:
10536:
10424:
10313:
10197:
10162:
10080:
10021:
9931:
9813:
9725:
9675:Phoenix Metropolitan Area
9595:
9524:
9469:Congressional Delegations
9422:
9410:
9271:
9243:
9222:
9191:
9143:
8934:
8873:
8777:January 17, 2016, at the
8772:Grand Canyon Bibliography
8712:
8707:
7783:Markovich, Katie (2015).
6497:Chappell, Gordon (1985).
6119:. Cronkite News Service.
4876:Western River Expeditions
4705:. HarperCollins. p.
4463:Oxford English Dictionary
3385:Utah History Encyclopedia
3197:10.1146/knowable-022619-1
3126:. John Wiley & Sons.
3123:Geology of U.S. Parklands
3104:January 29, 2022, at the
2552:Grand Canyon regional map
1931:at the Grand Canyon, 2008
1751:
1698:Mohave Generating Station
1685:Navajo Generating Station
949:to search for the fabled
934:'s 1540â1542 expedition.
924:La conquista del Colorado
270:
230:
222:
212:
207:
199:
194:
186:
182:277 mi (446 km)
178:
170:
161:Show map of North America
65:
46:
41:
11980:(wife, 1885â1914, death)
11740:Congressional Government
11650:Federal Power Commission
11409:Federal Trade Commission
11242:Racial Equality Proposal
11220:National War Labor Board
9294:Grand Canyon Conservancy
8599:Citylab (May 26, 2015).
7503:Water Resources Research
6413:Glick, Marshall (2015).
5026:Ives, Joseph C. (1861).
4846:The Page-Lake Powell Hub
4773:Hill, Joseph J. (1923).
4548:"Kaibab National Forest"
3726:Johnson, Joshua (2013).
3695:Johnson, Joshua (2013).
2974:Southern Paiute language
2970:BidĂĄĂĄĘź HaĘźaztĘźiĘź TsĂŠkooh
2936:
1580:National Weather Service
1006:missionary, was sent by
955:GarcĂa LĂłpez de CĂĄrdenas
936:GarcĂa LĂłpez de CĂĄrdenas
779:. The word "Anasazi" is
361:GarcĂa LĂłpez de CĂĄrdenas
12059:Woodrow Wilson and race
11880:Woodrow Wilson Monument
11694:Boyhood home in Georgia
11599:War Revenue Act of 1917
11494:Federal Farm Loan Board
11427:SmithâLever Act of 1914
11349:Rivers and Harbors Acts
11210:Immigration Act of 1918
11200:Immigration Act of 1917
11136:Philippine Autonomy Act
10717:Central Arizona Project
10707:Colorado River Aqueduct
10679:Theodore Roosevelt Lake
10639:Flaming Gorge Reservoir
9951:Battle of Ambos Nogales
9115:Uinkaret volcanic field
8994:Grand Canyon Supergroup
8881:Black Suspension Bridge
8394:"Grand Canyon Area Map"
7604:10.1126/science.aay9187
5547:Arizona Archives Online
5221:"The Powell Expedition"
4970:Smithsonian Institution
4494:The Ancestral Puebloans
4468:Oxford University Press
4044:10.1126/science.1229390
3847:10.1126/science.1151248
3550:10.1029/JZ068i024p06447
2961:
2953:
2927:â A gigantic canyon on
2666:Grand Canyon fatalities
2529:View from the South Rim
2205:swallowtail butterflies
1276:Boone and Crockett Club
1156:Robert Brewster Stanton
1070:stern wheeler steamboat
1063:Also in 1857, the U.S.
1049:Edward Fitzgerald Beale
1012:Crossing of the Fathers
680:Ribbon Falls, near the
649:million years ago. The
584:Grand Canyon Supergroup
92:Location within Arizona
12149:Physiographic sections
11687:papers and manuscripts
11432:War Risk Insurance Act
11236:Paris Peace Conference
11031:1919 Nobel Peace Prize
11014:Supreme Court nominees
10954:Governor of New Jersey
10851:Colorado River Compact
10748:Boulder Canyon Project
9332:(2017 children's book)
8317:public domain material
8265:public domain material
8221:public domain material
8175:public domain material
8127:public domain material
8088:public domain material
8044:public domain material
8005:public domain material
7941:public domain material
7881:public domain material
5717:Berke, Arnold (2002).
5354:March 4, 2016, at the
5322:U.S. Geological Survey
5159:Utah Geological Survey
4697:Stegner, Page (1994).
4596:Whiting, A.F. (1985).
4201:Wesoloski, Catherine.
3576:public domain material
3242:Ranney, Wayne (2005).
3228:April 3, 2007, at the
2977:
2976:: Paxaâuipi, Spanish:
2969:
2680:
2645:
2624:Kaibab National Forest
2586:Arizona State Route 67
2582:Desert View Watchtower
2574:Arizona State Route 64
2561:
2553:
2426:Canadian and Hudsonian
2311:
2299:
2252:
2174:desert gopher tortoise
1932:
1888:western honey mesquite
1842:
1794:
1724:
1676:
1674:temperature inversions
1603:
1558:
1548:North American Monsoon
1515:Desert View Watchtower
1489:
1407:
1404:Desert View Watchtower
1348:
1302:on February 26, 1919.
1292:U.S. National Monument
1270:
1256:
1224:Grand Canyon Village:
1188:
1098:
1053:Fort Defiance, Arizona
1044:
1018:on a raft in 1858 and
974:explored southern Utah
951:Seven Cities of Cibola
939:
758:
685:
475:
463:
414:that exposes uplifted
407:
387:
379:
307:Kaibab National Forest
12073:â William Howard Taft
12014:Joseph Ruggles Wilson
12002:Eleanor Wilson McAdoo
11886:Woodrow Wilson Bridge
11820:Woodrow Wilson Awards
11558:Warehouse Act of 1916
11524:National Park Service
11483:Federal Farm Loan Act
11450:Occupancy Permits Act
11195:Espionage Act of 1917
11106:BryanâChamorro Treaty
11009:Judicial appointments
10840:Arizona v. California
10484:Little Colorado River
9981:Territorial evolution
9976:Sitgreaves Expedition
9655:North Central Arizona
9358:Grand Canyon Escalade
9322:A Bigger Grand Canyon
9178:Little Colorado River
8891:Grand Canyon Escalade
8730:National Park Service
8356:on September 28, 2010
8330:National Park Service
8278:National Park Service
8234:National Park Service
8188:National Park Service
8140:National Park Service
8101:National Park Service
8057:National Park Service
8018:National Park Service
7954:National Park Service
7894:National Park Service
7447:National Park Service
7027:National Park Service
6849:National Park Service
6819:National Park Service
6761:on September 19, 2006
6474:. November 25, 2008.
6388:National Park Service
5225:Grand Canyon Explorer
5196:. PBS. Archived from
5055:Gilbert, Bil (1985).
4995:Anderson, Michael F.
4813:Lake Powell Chronicle
3589:National Park Service
3071:Linford, Laurence D.
2912:A Bigger Grand Canyon
2822:Earth sciences portal
2780:Major League Baseball
2678:
2660:Grand Canyon Escalade
2639:
2559:
2551:
2415:Utah tiger salamander
2305:
2297:
2238:
2094:(clams) and nine are
1926:
1836:
1819:tassel-eared squirrel
1792:
1768:, and 195 species of
1741:National Park Service
1722:
1671:
1601:
1556:
1477:
1402:
1346:
1262:
1243:
1180:
1092:
1036:
928:Augusto Ferrer-Dalmau
922:
836:Little Colorado River
753:
679:
660:Between 100,000 and 3
469:
461:
393:
385:
374:
11984:Edith Bolling Wilson
11836:The Wilson Quarterly
11719:Woodrow Wilson House
11637:Railroad Labor Board
11255:Treaty of Versailles
11226:Sedition Act of 1918
10788:Arches National Park
10634:Fontenelle Reservoir
10331:Colorado River Basin
10271:Middle Granite Gorge
9610:Arizona Sun Corridor
8979:Grand Canyon Caverns
8969:Ericameria arizonica
8901:Grand Canyon Skywalk
8557:. November 1, 2017.
8520:Moorman, Robert W. "
8492:"Backcountry Permit"
7758:The Arizona Republic
7524:10.1029/2018WR023153
7069:on February 11, 2012
6883:The Arizona Republic
6117:The Arizona Republic
5928:. November 1, 2018.
5603:"Lees Ferry History"
5399:"Grand Canyon Facts"
5318:"John Wesley Powell"
5259:jonathanwaterman.com
5250:Waterman, Jonathan.
5001:Grand Canyon History
4736:Arizona and the West
4554:on February 10, 2009
4371:Hydrogeology Journal
4340:. January 23, 2020.
4282:Hydrogeology Journal
3635:(January 26, 2011).
3581:"Nature and Science"
2904:Making North America
2642:view in high quality
2595:Grand Canyon Skywalk
2578:Grand Canyon Village
2535:Grand Canyon tourism
2170:western banded gecko
2147:four-winged saltbush
2021:desert bighorn sheep
1969:are extremely rare.
1909:Flaveria mcdougallii
1607:as forest fires and
1499:Grand Canyon Railway
1412:Buckey O'Neill Cabin
1394:Grand Canyon Village
1250:Grand Canyon Village
1244:Railway Station and
1124:Green River, Wyoming
1112:John Strong Newberry
1104:San Francisco Herald
1060:natural curiosity."
992:American exploration
788:Pecos Classification
655:differential erosion
12080:Warren G. Harding â
12028:(cousin, secretary)
12026:Helen Woodrow Bones
11996:Jessie Wilson Sayre
11928:Profiles in Courage
11896:U.S. Postage stamps
11604:Revenue Act of 1918
11531:Revenue Act of 1916
11337:Revenue Act of 1913
11305:Federal Reserve Act
11112:Occupation of Haiti
10876:Rapids and features
10644:Blue Mesa Reservoir
10276:Lower Granite Gorge
9700:Traditional Arizona
9511:Tourist attractions
9009:Sixtymile Formation
9004:Nankoweap Formation
8974:Esplanade Sandstone
7595:2020Sci...367.1252M
7589:(6483): 1252â1255.
7552:The Weather Channel
7515:2018WRR....54.6739X
7254:2005JAWMA..55.1675G
6928:2009JAWMA..59.1070B
6601:on October 5, 2012.
6222:2021NatSR..1122157T
6057:. January 9, 2012.
5811:"The Kolb Brothers"
5379:on November 6, 2012
5292:American Experience
5194:American Experience
5161:. August 29, 2019.
4930:Tabor, C C (1968).
4466:(Online ed.).
4383:2019HydJ...27.2857J
4294:2020HydJ...28.1593S
4093:on October 31, 2013
4035:2012Sci...338.1616F
4029:(6114): 1616â1619.
3945:2008GSAB..120..571F
3839:2008Sci...319.1377P
3833:(5868): 1377â1380.
3732:cires1.colorado.edu
3701:cires1.colorado.edu
3658:2011GSAB..123.1288W
3542:1963JGR....68.6447M
3431:2014Geosp..10..233R
3326:2013Geosp...9..444S
3285:2015Geosp..11..958D
3017:2014NatGe...7..239K
2888:Jacob Lake, Arizona
2385:, pinyon pine, and
2328:tassel-eared Kaibab
2265:narrowleaf mesquite
2221:black widow spiders
1945:Rocky Mountain toad
1747:Biology and ecology
1529:Fred Harvey Company
1519:Ancestral Puebloans
1388:South Rim buildings
1196:, William W. Bass,
880:San Francisco Peaks
768:Ancestral Puebloans
664:million years ago,
505:uranium-lead dating
250: /
95:Show map of Arizona
11978:Ellen Axson Wilson
11947:(2002 documentary)
11489:Farm Credit System
11392:Cutter Service Act
11342:Federal income tax
11318:Newlands Labor Act
10886:William Mulholland
10722:All-American Canal
10712:San Diego Aqueduct
10674:Imperial Reservoir
10494:Roaring Fork River
10032:Arizona portal
9300:Grand Canyon Suite
9183:Bright Angel Creek
9103:Bright Angel Shale
8944:Agave phillipsiana
8807:The New York Times
8522:Noise in the Parks
8462:The New York Times
6276:. August 8, 2023.
6210:Scientific Reports
6086:Grand Canyon Trust
5840:Sheldon, Charles.
4815:. April 20, 2022.
4149:www.abqjournal.com
3652:(7â8): 1288â1316.
3440:10.1130/GES00960.1
3391:on January 9, 2013
3335:10.1130/ges00896.1
3294:10.1130/ges01131.1
2877:Grand Canyon Suite
2681:
2646:
2562:
2554:
2312:
2300:
2289:California condors
2253:
2181:orange paper wasps
2159:rubber rabbitbrush
2137:, catclaw acacia,
1975:antelope squirrels
1943:, and Woodhouse's
1933:
1843:
1795:
1725:
1677:
1662:Regional Haze Rule
1604:
1559:
1525:Bright Angel Lodge
1490:
1487:Grand Canyon Depot
1426:Bright Angel Trail
1408:
1349:
1296:U.S. National Park
1271:
1257:
1192:Miners: "Captain"
1189:
1164:Gulf of California
1119:John Wesley Powell
1099:
1045:
1042:Wheeler expedition
1028:John Wesley Powell
940:
798:Basketmaker II Era
759:
755:Ancestral Puebloan
686:
682:North Kaibab Trail
639:Gulf of California
593:Coconino Sandstone
574:Then, between 1.25
476:
464:
424:Kali Gandaki Gorge
408:
388:
380:
331:Theodore Roosevelt
12101:
12100:
12008:Francis Sayre Jr.
11986:(wife, 1915â1924)
11939:(1979 miniseries)
11670:
11669:
11644:Federal Power Act
11281:Wilsonian Armenia
11268:League of Nations
10999:1917 inauguration
10994:1913 inauguration
10894:
10893:
10776:
10775:
10439:Dirty Devil River
10376:Palo Verde Valley
10282:Grand Wash Canyon
10227:Horsethief Canyon
10039:
10038:
9941:Arizona Territory
9660:Northeast Arizona
9366:
9365:
9307:Desert Wonderland
9083:Redwall Limestone
9053:Hyaloclastite Dam
9024:Shinumo Quartzite
8916:Marble Canyon Dam
8886:Bridge Canyon Dam
8736:
8735:
8527:AHS International
8049:"Endangered Fish"
7248:(11): 1675â1682.
6790:on August 1, 2010
6722:. March 8, 2007.
6472:Grand Canyon News
5910:on March 4, 2016.
5877:High Country News
4600:Havasupai Habitat
4490:"Getting Started"
4474:(Subscription or
3795:. March 7, 2008.
3536:(24): 6447â6458.
3188:Knowable Magazine
3133:978-0-471-33218-3
3005:Nature Geoscience
2688:1956 air disaster
2671:Mid-1800s to 2015
2637:
2590:Grand Canyon West
2484:American goshawks
2399:mountain mahogany
2395:New Mexico locust
2338:, mule deer, and
2332:Abert's squirrels
2241:California condor
1853:and 22 are bats.
1790:
1760:, 167 species of
1503:Williams, Arizona
1367:Pinyon Plain Mine
1307:California condor
1101:According to the
915:Spanish explorers
621:elevation summary
520:thermochronometry
402:, June 27, 2017,
286:is a steep-sided
280:
279:
203:5â6 million years
16:(Redirected from
12166:
12129:Colorado Plateau
12091:
12090:
11631:EschâCummins Act
11573:SmithâHughes Act
11512:KeatingâOwen Act
11089:
11088:
11041:Silent Sentinels
10966:
10957:
10946:
10921:
10914:
10907:
10898:
10897:
10781:Designated areas
10763:Grand Valley AVA
10627:Major reservoirs
10541:
10540:
10336:Colorado Plateau
10314:Natural features
10277:
10272:
10267:
10262:
10236:Westwater Canyon
10192:
10186:
10180:
10174:
10168:
10155:
10148:
10136:
10129:
10122:
10115:
10108:
10101:
10094:
10066:
10059:
10052:
10043:
10042:
10030:
10029:
10028:
10013:Women's suffrage
9873:Lake Havasu City
9695:Southern Arizona
9670:Oak Creek Canyon
9665:Northern Arizona
9635:Mogollon Plateau
9620:Colorado Plateau
9615:Coconino Plateau
9496:Native Americans
9393:
9386:
9379:
9370:
9369:
9120:Vasey's Paradise
9048:Hermit Formation
8860:
8853:
8846:
8837:
8836:
8792:Travel and sites
8753:
8752:
8717:
8716:
8705:
8704:
8694:
8693:
8691:
8689:
8678:Arizona Republic
8669:
8663:
8662:
8644:
8638:
8637:
8619:
8613:
8612:
8596:
8590:
8589:
8577:
8571:
8570:
8568:
8566:
8547:
8541:
8518:
8512:
8511:
8509:
8507:
8488:
8479:
8478:
8476:
8474:
8452:
8446:
8445:
8443:
8441:
8422:
8416:
8415:
8413:
8411:
8405:
8398:
8390:
8384:
8383:
8372:
8366:
8365:
8363:
8361:
8355:
8348:
8340:
8334:
8333:
8314:
8313:
8308:
8289:
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8286:
8284:
8262:
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8256:
8245:
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8218:
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8212:
8199:
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8172:
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8118:
8112:
8111:
8109:
8107:
8085:
8084:
8079:
8068:
8067:
8065:
8063:
8041:
8040:
8035:
8029:
8028:
8026:
8024:
8002:
8001:
7996:
7965:
7964:
7962:
7960:
7938:
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7932:
7905:
7904:
7902:
7900:
7878:
7877:
7872:
7833:
7832:
7830:
7828:
7809:
7803:
7802:
7800:
7789:
7780:
7774:
7773:
7771:
7769:
7749:
7740:
7739:
7737:
7735:
7715:
7706:
7705:
7669:
7663:
7662:
7660:
7658:
7639:
7633:
7632:
7606:
7574:
7568:
7567:
7565:
7563:
7543:
7537:
7536:
7526:
7509:(9): 6739â6756.
7494:
7488:
7487:
7485:
7483:
7464:
7458:
7457:
7455:
7444:
7436:
7427:
7426:
7424:
7422:
7417:on March 1, 2013
7407:
7401:
7400:
7398:
7396:
7390:
7383:
7375:
7369:
7368:
7366:
7364:
7358:
7351:
7343:
7337:
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7334:
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7326:
7319:
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7110:
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7093:
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7076:
7074:
7068:
7061:
7052:
7046:
7045:
7043:
7041:
7035:
7024:
7016:
7010:
7009:
7007:
7005:
6999:
6992:
6982:
6976:
6975:
6973:
6971:
6922:(9): 1070â1081.
6913:
6905:
6899:
6898:
6896:
6894:
6874:
6865:
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6862:
6860:
6841:
6835:
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6811:
6805:
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6753:
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5478:
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5467:
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5442:
5441:
5439:
5437:
5417:
5411:
5410:
5395:
5389:
5388:
5386:
5384:
5365:
5359:
5358:, Etymonline.com
5344:
5338:
5337:
5335:
5333:
5314:
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5278:
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4992:
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4799:
4798:
4796:
4794:
4770:
4764:
4763:
4761:
4759:
4727:
4721:
4720:
4704:
4694:
4685:
4684:
4682:
4680:
4648:
4642:
4641:
4639:
4637:
4622:
4616:
4615:
4603:
4593:
4587:
4586:
4580:
4570:
4564:
4563:
4561:
4559:
4544:
4538:
4537:
4519:
4510:
4509:
4507:
4505:
4486:
4480:
4479:
4471:
4459:
4452:
4446:
4445:
4443:
4441:
4421:
4415:
4414:
4412:
4410:
4377:(8): 2857â2868.
4368:
4360:
4354:
4353:
4351:
4349:
4330:
4324:
4323:
4305:
4288:(5): 1593â1613.
4273:
4267:
4266:
4264:
4262:
4256:
4249:
4238:
4229:
4228:
4226:
4224:
4218:
4207:
4198:
4192:
4191:
4189:
4187:
4174:Leveson, David.
4171:
4165:
4164:
4162:
4160:
4140:
4134:
4133:
4131:
4129:
4109:
4103:
4102:
4100:
4098:
4079:
4073:
4072:
4046:
4014:
4008:
4007:
4005:
4003:
3983:
3977:
3976:
3974:
3972:
3953:10.1130/B26231.1
3939:(5â6): 571â587.
3930:
3922:
3916:
3915:
3913:
3911:
3891:
3882:
3881:
3879:
3877:
3824:
3815:
3809:
3808:
3806:
3804:
3785:
3779:
3778:
3776:
3774:
3754:
3748:
3747:
3745:
3743:
3723:
3717:
3716:
3714:
3712:
3692:
3686:
3685:
3666:10.1130/B30274.1
3641:
3629:
3623:
3622:
3620:
3618:
3599:
3593:
3592:
3573:
3572:
3567:
3554:
3553:
3525:
3519:
3518:
3516:
3514:
3503:ResearchGate.net
3494:
3488:
3487:
3485:
3483:
3477:
3470:
3459:
3453:
3452:
3442:
3410:
3401:
3400:
3398:
3396:
3387:. Archived from
3377:
3371:
3370:
3346:
3340:
3339:
3337:
3305:
3299:
3298:
3296:
3264:
3258:
3257:
3239:
3233:
3220:
3214:
3213:
3211:
3209:
3199:
3179:
3150:
3149:
3147:
3145:
3117:
3108:
3095:
3089:
3082:
3076:
3069:
3063:
3062:
3060:
3058:
3043:
3037:
3036:
3025:10.1038/ngeo2065
3000:
2980:
2947:
2925:Valles Marineris
2919:Pine Creek Gorge
2852:
2847:
2846:
2845:
2838:
2836:Geography portal
2833:
2832:
2831:
2824:
2819:
2818:
2817:
2810:
2805:
2804:
2803:
2743:
2732:positive control
2638:
2522:
2503:Indian ricegrass
2486:are found here.
2436:Engelmann spruce
2407:creeping mahonia
2363:Indian ricegrass
2075:, including the
1941:red-spotted toad
1937:canyon tree frog
1918:razorback sucker
1791:
1764:, 64 species of
1708:Prescribed fires
1655:Colorado Plateau
1501:which begins in
1480:steam locomotive
1456:Mary Jane Colter
1379:
1278:helped form the
1226:Ralph H. Cameron
1187:
1184:
1057:Coconino Plateau
893:
888:Great Slave Lake
861:
856:
845:
814:
795:
777:Puebloan peoples
762:Native Americans
663:
648:
636:
613:Laramide orogeny
610:
581:
577:
566:
563:billion and 1.25
562:
557:Kaibab Limestone
547:
543:
535:
525:
496:
489:
481:
412:Colorado Plateau
342:Colorado Plateau
265:
264:
262:
261:
260:
255:
251:
248:
247:
246:
243:
162:
148:
147:
141:
129:
115:
114:
108:
96:
82:
81:
75:
51:
39:
38:
21:
18:The Grand Canyon
12174:
12173:
12169:
12168:
12167:
12165:
12164:
12163:
12104:
12103:
12102:
12097:
12063:
12049:Progressive Era
12037:
11990:Margaret Wilson
11966:
11911:
11905:
11870:(Austin statue)
11803:
11797:
11759:
11753:The New Freedom
11728:
11666:
11311:Federal Reserve
11286:
11173:Fourteen Points
11168:Four Minute Men
11087:
10977:
10969:
10960:
10949:
10938:
10930:
10925:
10895:
10890:
10827:
10772:
10736:
10732:Coachella Canal
10694:
10688:
10684:San Carlos Lake
10622:
10553:Shadow Mountain
10532:
10449:Escalante River
10420:
10411:Montague Island
10401:Imperial Valley
10381:Colorado Desert
10326:Rocky Mountains
10309:
10275:
10270:
10265:
10258:
10241:Cataract Canyon
10223:De Beque Canyon
10218:Glenwood Canyon
10193:
10187:
10181:
10175:
10169:
10160:
10151:
10146:Baja California
10144:
10132:
10125:
10118:
10111:
10104:
10097:
10090:
10076:
10070:
10040:
10035:
10026:
10024:
10017:
9927:
9809:
9721:
9717:White Mountains
9707:Transition zone
9650:Monument Valley
9591:
9520:
9479:Representatives
9418:
9406:
9397:
9367:
9362:
9325:(1998 painting)
9267:
9239:
9218:
9199:Harvey Butchart
9187:
9144:Bodies of water
9139:
9135:Vulcan's Throne
9033:Grand Staircase
8959:Cardenas Basalt
8930:
8869:
8864:
8820:NPS Photographs
8779:Wayback Machine
8750:
8726:Wayback Machine
8714:
8703:
8698:
8697:
8687:
8685:
8670:
8666:
8659:
8645:
8641:
8634:
8620:
8616:
8597:
8593:
8578:
8574:
8564:
8562:
8549:
8548:
8544:
8539:Wayback Machine
8519:
8515:
8505:
8503:
8490:
8489:
8482:
8472:
8470:
8453:
8449:
8439:
8437:
8424:
8423:
8419:
8409:
8407:
8403:
8396:
8392:
8391:
8387:
8374:
8373:
8369:
8359:
8357:
8353:
8346:
8342:
8341:
8337:
8320:
8311:
8309:
8292:
8282:
8280:
8268:
8259:
8257:
8248:
8238:
8236:
8224:
8215:
8213:
8202:
8192:
8190:
8178:
8169:
8167:
8154:
8144:
8142:
8130:
8121:
8119:
8115:
8105:
8103:
8091:
8082:
8080:
8071:
8061:
8059:
8047:
8038:
8036:
8032:
8022:
8020:
8008:
7999:
7997:
7968:
7958:
7956:
7944:
7935:
7933:
7908:
7898:
7896:
7884:
7875:
7873:
7836:
7826:
7824:
7811:
7810:
7806:
7798:
7787:
7781:
7777:
7767:
7765:
7750:
7743:
7733:
7731:
7716:
7709:
7670:
7666:
7656:
7654:
7641:
7640:
7636:
7575:
7571:
7561:
7559:
7544:
7540:
7495:
7491:
7481:
7479:
7466:
7465:
7461:
7453:
7442:
7438:
7437:
7430:
7420:
7418:
7409:
7408:
7404:
7394:
7392:
7388:
7381:
7377:
7376:
7372:
7362:
7360:
7356:
7349:
7345:
7344:
7340:
7330:
7328:
7324:
7317:
7309:
7305:
7295:
7293:
7232:
7228:
7218:
7216:
7203:
7199:
7189:
7187:
7176:
7172:
7162:
7160:
7156:
7149:
7145:
7144:
7140:
7130:
7128:
7119:
7118:
7114:
7104:
7102:
7098:
7091:
7087:
7086:
7082:
7072:
7070:
7066:
7059:
7053:
7049:
7039:
7037:
7033:
7022:
7018:
7017:
7013:
7003:
7001:
6997:
6990:
6984:
6983:
6979:
6969:
6967:
6906:
6902:
6892:
6890:
6875:
6868:
6858:
6856:
6843:
6842:
6838:
6828:
6826:
6813:
6812:
6808:
6793:
6791:
6782:
6781:
6774:
6764:
6762:
6758:
6751:
6747:
6746:
6742:
6732:
6730:
6726:
6719:
6715:
6714:
6710:
6700:
6698:
6689:
6688:
6684:
6674:
6672:
6663:
6662:
6658:
6648:
6646:
6637:
6636:
6632:
6622:
6620:
6611:
6610:
6606:
6593:
6592:
6585:
6572:
6571:
6567:
6557:
6555:
6550:. May 4, 2018.
6542:
6541:
6537:
6527:
6525:
6510:
6506:
6495:
6491:
6481:
6479:
6466:
6465:
6461:
6451:
6449:
6442:
6426:
6422:
6411:
6407:
6397:
6395:
6382:
6381:
6377:
6367:
6365:
6361:
6355:
6344:
6336:
6332:
6322:
6320:
6313:
6297:
6293:
6283:
6281:
6268:
6267:
6263:
6202:
6198:
6188:
6186:
6171:
6167:
6157:
6155:
6140:
6136:
6126:
6124:
6109:
6105:
6095:
6093:
6078:
6074:
6064:
6062:
6049:
6048:
6041:
6031:
6029:
6025:
6014:
6010:
6009:
6002:
5983:
5976:
5966:
5964:
5949:
5945:
5935:
5933:
5920:
5919:
5915:
5900:
5896:
5886:
5884:
5869:
5865:
5855:
5853:
5838:
5834:
5824:
5822:
5809:
5808:
5801:
5791:
5789:
5774:
5770:
5763:
5749:
5736:
5729:
5715:
5702:
5695:
5681:
5677:
5667:
5665:
5630:
5626:
5616:
5614:
5601:
5600:
5596:
5586:
5584:
5571:
5570:
5566:
5556:
5554:
5541:
5540:
5536:
5526:
5524:
5511:
5510:
5506:
5496:
5494:
5479:
5475:
5465:
5463:
5450:
5449:
5445:
5435:
5433:
5418:
5414:
5397:
5396:
5392:
5382:
5380:
5369:"Late Arrivals"
5367:
5366:
5362:
5356:Wayback Machine
5345:
5341:
5331:
5329:
5316:
5315:
5311:
5301:
5299:
5286:
5285:
5281:
5271:
5269:
5265:
5254:
5248:
5244:
5234:
5232:
5217:
5213:
5203:
5201:
5200:on May 18, 2022
5188:
5187:
5178:
5168:
5166:
5153:
5152:
5148:
5138:
5136:
5121:
5117:
5107:
5105:
5092:
5088:
5078:
5076:
5069:
5053:
5049:
5039:
5037:
5024:
5020:
5010:
5008:
4993:
4989:
4979:
4977:
4964:
4963:
4959:
4949:
4947:
4943:
4936:
4928:
4924:
4914:
4912:
4899:
4895:
4885:
4883:
4870:
4869:
4865:
4855:
4853:
4840:
4839:
4832:
4822:
4820:
4807:
4806:
4802:
4792:
4790:
4771:
4767:
4757:
4755:
4728:
4724:
4717:
4695:
4688:
4678:
4676:
4669:
4661:. p. 214.
4649:
4645:
4635:
4633:
4624:
4623:
4619:
4612:
4594:
4590:
4571:
4567:
4557:
4555:
4546:
4545:
4541:
4534:
4520:
4513:
4503:
4501:
4500:on July 9, 2010
4488:
4487:
4483:
4473:
4453:
4449:
4439:
4437:
4422:
4418:
4408:
4406:
4361:
4357:
4347:
4345:
4332:
4331:
4327:
4274:
4270:
4260:
4258:
4254:
4247:
4239:
4232:
4222:
4220:
4216:
4205:
4199:
4195:
4185:
4183:
4172:
4168:
4158:
4156:
4141:
4137:
4127:
4125:
4110:
4106:
4096:
4094:
4081:
4080:
4076:
4015:
4011:
4001:
3999:
3992:Washington Post
3984:
3980:
3970:
3968:
3923:
3919:
3909:
3907:
3892:
3885:
3875:
3873:
3822:
3816:
3812:
3802:
3800:
3787:
3786:
3782:
3772:
3770:
3755:
3751:
3741:
3739:
3724:
3720:
3710:
3708:
3693:
3689:
3639:
3630:
3626:
3616:
3614:
3601:
3600:
3596:
3579:
3570:
3568:
3557:
3526:
3522:
3512:
3510:
3495:
3491:
3481:
3479:
3475:
3468:
3460:
3456:
3411:
3404:
3394:
3392:
3379:
3378:
3374:
3363:
3347:
3343:
3306:
3302:
3265:
3261:
3254:
3240:
3236:
3230:Wayback Machine
3221:
3217:
3207:
3205:
3180:
3153:
3143:
3141:
3134:
3118:
3111:
3106:Wayback Machine
3096:
3092:
3083:
3079:
3070:
3066:
3056:
3054:
3045:
3044:
3040:
3001:
2994:
2989:
2984:
2983:
2948:
2944:
2939:
2934:
2915:, 1998 painting
2906:(2015 PBS film)
2848:
2843:
2841:
2834:
2829:
2827:
2820:
2815:
2813:
2806:
2801:
2799:
2796:
2776:
2764:
2757:
2756:
2755:
2749:
2744:
2710:United Airlines
2696:
2690:
2673:
2668:
2629:
2615:heat exhaustion
2546:
2537:
2532:
2531:
2530:
2528:
2523:
2428:
2283:, and suitable
2233:
2189:tarantula hawks
2187:, black flies,
2168:Except for the
1872:
1859:
1831:
1780:
1758:vascular plants
1754:
1749:
1717:
1703:
1695:
1691:
1682:
1596:
1538:
1434:Colorado Rivers
1390:
1377:
1314:Glen Canyon Dam
1288:national forest
1284:Antiquities Act
1238:
1213:Emma Lee French
1185:
1175:
1130:, reaching its
1117:In 1869, Major
1024:Harrison Pearce
994:
917:
912:
891:
866:. The Southern
859:
854:
843:
812:
791:
764:
748:
742:
722:geologic faults
674:
661:
646:
634:
617:stream gradient
608:
579:
578:billion and 730
575:
564:
560:
545:
541:
536:million years.
533:
523:
494:
487:
479:
456:
450:
369:
258:
256:
254:36.3°N 112.75°W
252:
249:
244:
241:
239:
237:
236:
171:Floor elevation
166:
165:
164:
163:
160:
159:
156:
155:
154:
153:
149:
132:
131:
130:
127:
126:
123:
122:
121:
120:
116:
99:
98:
97:
94:
93:
90:
89:
88:
87:
83:
61:
35:
28:
23:
22:
15:
12:
11:
5:
12172:
12162:
12161:
12156:
12151:
12146:
12141:
12136:
12134:Colorado River
12131:
12126:
12121:
12116:
12099:
12098:
12096:
12095:
12084:
12083:
12076:
12068:
12065:
12064:
12062:
12061:
12056:
12051:
12045:
12043:
12039:
12038:
12036:
12035:
12032:William McAdoo
12029:
12023:
12017:
12011:
12005:
11999:
11993:
11987:
11981:
11974:
11972:
11968:
11967:
11965:
11964:
11963:(2022 musical)
11956:
11948:
11940:
11932:
11924:
11915:
11913:
11907:
11906:
11904:
11903:
11898:
11893:
11888:
11883:
11877:
11871:
11867:Woodrow Wilson
11863:
11856:
11851:
11846:
11841:
11840:
11839:
11827:
11822:
11817:
11811:
11809:
11799:
11798:
11796:
11795:
11790:
11785:
11780:
11775:
11769:
11767:
11761:
11760:
11758:
11757:
11749:
11743:
11736:
11734:
11730:
11729:
11727:
11726:
11721:
11716:
11711:
11706:
11701:
11696:
11691:
11690:
11689:
11678:
11676:
11672:
11671:
11668:
11667:
11665:
11664:
11659:
11654:
11653:
11652:
11641:
11640:
11639:
11628:
11622:
11616:
11611:
11606:
11601:
11596:
11595:
11594:
11583:
11582:
11581:
11570:
11565:
11560:
11555:
11550:
11544:
11538:
11533:
11528:
11527:
11526:
11515:
11509:
11504:
11498:
11497:
11496:
11491:
11480:
11474:
11469:
11464:
11459:
11453:
11447:
11441:
11435:
11429:
11424:
11418:
11413:
11412:
11411:
11401:
11395:
11389:
11384:
11379:
11373:
11372:
11371:
11366:
11361:
11356:
11346:
11345:
11344:
11334:
11328:
11327:
11326:
11315:
11314:
11313:
11302:
11296:
11294:
11288:
11287:
11285:
11284:
11278:
11277:
11276:
11265:
11264:
11263:
11252:
11246:
11245:
11244:
11233:
11228:
11223:
11217:
11212:
11207:
11202:
11197:
11192:
11191:
11190:
11185:
11180:
11175:
11170:
11165:
11160:
11155:
11150:
11139:
11133:
11132:
11131:
11121:
11115:
11109:
11103:
11097:
11095:
11093:Foreign policy
11086:
11085:
11080:
11075:
11070:
11065:
11060:
11055:
11050:
11049:
11048:
11043:
11036:19th Amendment
11033:
11028:
11023:
11022:
11021:
11016:
11006:
11004:Roosevelt desk
11001:
10996:
10991:
10985:
10983:
10971:
10970:
10968:
10967:
10958:
10947:
10935:
10932:
10931:
10928:Woodrow Wilson
10924:
10923:
10916:
10909:
10901:
10892:
10891:
10889:
10888:
10883:
10878:
10873:
10868:
10863:
10858:
10853:
10848:
10843:
10835:
10833:
10832:Related topics
10829:
10828:
10826:
10825:
10820:
10815:
10810:
10805:
10800:
10795:
10790:
10784:
10782:
10778:
10777:
10774:
10773:
10771:
10770:
10765:
10760:
10755:
10750:
10744:
10742:
10741:Water projects
10738:
10737:
10735:
10734:
10729:
10724:
10719:
10714:
10709:
10704:
10698:
10696:
10690:
10689:
10687:
10686:
10681:
10676:
10671:
10666:
10661:
10656:
10651:
10646:
10641:
10636:
10630:
10628:
10624:
10623:
10621:
10620:
10615:
10610:
10605:
10600:
10595:
10590:
10585:
10580:
10575:
10570:
10565:
10560:
10555:
10549:
10547:
10538:
10534:
10533:
10531:
10530:
10525:
10520:
10518:Las Vegas Wash
10515:
10510:
10501:
10499:San Juan River
10496:
10491:
10486:
10481:
10476:
10474:Gunnison River
10471:
10466:
10461:
10456:
10451:
10446:
10441:
10436:
10430:
10428:
10422:
10421:
10419:
10418:
10413:
10408:
10403:
10398:
10393:
10388:
10383:
10378:
10373:
10368:
10363:
10358:
10353:
10351:Sonoran Desert
10348:
10346:Horseshoe Bend
10343:
10338:
10333:
10328:
10323:
10317:
10315:
10311:
10310:
10308:
10307:
10304:
10302:Pyramid Canyon
10299:
10294:
10292:Boulder Canyon
10289:
10286:
10285:Iceberg Canyon
10283:
10280:
10279:
10278:
10273:
10268:
10263:
10251:
10246:
10243:
10238:
10233:
10228:
10225:
10220:
10215:
10212:
10207:
10201:
10199:
10195:
10194:
10163:
10161:
10159:
10158:
10157:
10156:
10149:
10139:
10138:
10137:
10130:
10123:
10116:
10109:
10102:
10095:
10087:United States
10084:
10082:
10078:
10077:
10073:Colorado River
10069:
10068:
10061:
10054:
10046:
10037:
10036:
10022:
10019:
10018:
10016:
10015:
10010:
10005:
10004:
10003:
9998:
9993:
9983:
9978:
9973:
9968:
9966:Pah-Ute County
9963:
9958:
9953:
9948:
9943:
9937:
9935:
9929:
9928:
9926:
9925:
9920:
9915:
9910:
9905:
9900:
9895:
9890:
9885:
9880:
9875:
9870:
9865:
9860:
9855:
9850:
9845:
9840:
9835:
9830:
9825:
9819:
9817:
9811:
9810:
9808:
9807:
9802:
9797:
9792:
9787:
9782:
9777:
9772:
9767:
9762:
9757:
9752:
9747:
9742:
9737:
9731:
9729:
9723:
9722:
9720:
9719:
9714:
9709:
9704:
9703:
9702:
9692:
9690:Sonoran Desert
9687:
9682:
9677:
9672:
9667:
9662:
9657:
9652:
9647:
9642:
9637:
9632:
9630:Kaibab Plateau
9627:
9622:
9617:
9612:
9607:
9601:
9599:
9593:
9592:
9590:
9589:
9584:
9579:
9574:
9569:
9564:
9559:
9554:
9549:
9544:
9539:
9537:Climate change
9534:
9528:
9526:
9522:
9521:
9519:
9518:
9516:Transportation
9513:
9508:
9503:
9498:
9493:
9488:
9483:
9482:
9481:
9476:
9466:
9461:
9460:
9459:
9454:
9449:
9439:
9434:
9428:
9426:
9420:
9419:
9411:
9408:
9407:
9396:
9395:
9388:
9381:
9373:
9364:
9363:
9361:
9360:
9355:
9348:
9341:
9334:
9326:
9318:
9310:
9303:
9296:
9291:
9286:
9281:
9275:
9273:
9269:
9268:
9266:
9265:
9260:
9255:
9249:
9247:
9241:
9240:
9238:
9237:
9232:
9226:
9224:
9220:
9219:
9217:
9216:
9211:
9206:
9204:Colin Fletcher
9201:
9195:
9193:
9189:
9188:
9186:
9185:
9180:
9175:
9170:
9169:
9168:
9158:
9153:
9151:Colorado River
9147:
9145:
9141:
9140:
9138:
9137:
9132:
9127:
9122:
9117:
9112:
9110:Toroweap Fault
9107:
9106:
9105:
9095:
9090:
9085:
9080:
9075:
9070:
9065:
9060:
9055:
9050:
9045:
9040:
9035:
9030:
9029:
9028:
9027:
9026:
9021:
9019:Bass Formation
9011:
9006:
9001:
8991:
8986:
8981:
8976:
8971:
8966:
8961:
8956:
8951:
8946:
8940:
8938:
8932:
8931:
8929:
8928:
8923:
8918:
8913:
8908:
8903:
8898:
8893:
8888:
8883:
8877:
8875:
8871:
8870:
8863:
8862:
8855:
8848:
8840:
8834:
8833:
8828:
8822:
8811:
8810:
8809:, May 31, 2009
8800:
8789:
8788:
8782:
8763:
8762:
8747:
8742:
8734:
8733:
8710:
8709:
8708:External image
8702:
8701:External links
8699:
8696:
8695:
8664:
8658:978-0970097316
8657:
8639:
8633:978-0970097316
8632:
8626:. Puma Press.
8614:
8591:
8572:
8542:
8513:
8480:
8447:
8417:
8385:
8367:
8335:
8290:
8246:
8200:
8152:
8113:
8069:
8030:
7966:
7906:
7834:
7804:
7775:
7741:
7707:
7680:(1): 223â245.
7664:
7634:
7569:
7538:
7489:
7459:
7428:
7402:
7370:
7338:
7303:
7226:
7197:
7170:
7138:
7112:
7080:
7047:
7011:
6977:
6900:
6866:
6836:
6806:
6772:
6740:
6708:
6682:
6656:
6630:
6604:
6583:
6565:
6535:
6504:
6489:
6459:
6441:978-1439649886
6440:
6420:
6405:
6375:
6354:978-0365027799
6353:
6330:
6312:978-1610698405
6311:
6291:
6261:
6196:
6165:
6134:
6103:
6072:
6039:
6000:
5974:
5943:
5913:
5894:
5863:
5832:
5799:
5768:
5762:978-0938216452
5761:
5734:
5728:978-1568983455
5727:
5700:
5694:978-0874809152
5693:
5675:
5644:(4): 491â503.
5624:
5594:
5564:
5534:
5504:
5473:
5443:
5412:
5390:
5360:
5339:
5309:
5279:
5242:
5219:Ribokas, Bob.
5211:
5176:
5146:
5115:
5086:
5068:978-0806119342
5067:
5047:
5018:
4987:
4957:
4922:
4893:
4872:"Pearce Ferry"
4863:
4830:
4800:
4765:
4742:(2): 119â136.
4722:
4716:978-0062585646
4715:
4686:
4668:978-0826310118
4667:
4643:
4617:
4611:978-0816508662
4610:
4588:
4565:
4539:
4533:978-0962025532
4532:
4511:
4481:
4447:
4416:
4355:
4325:
4268:
4230:
4193:
4166:
4135:
4104:
4074:
4009:
3978:
3917:
3900:New York Times
3883:
3810:
3780:
3763:New York Times
3749:
3718:
3687:
3624:
3594:
3555:
3520:
3489:
3454:
3425:(2): 233â242.
3402:
3372:
3362:978-0826334619
3361:
3341:
3320:(3): 444â459.
3300:
3279:(4): 958â976.
3259:
3253:978-0938216827
3252:
3234:
3215:
3151:
3132:
3109:
3090:
3077:
3064:
3038:
3011:(3): 239â244.
2991:
2990:
2988:
2985:
2982:
2981:
2941:
2940:
2938:
2935:
2933:
2932:
2922:
2916:
2908:
2900:
2895:
2890:
2885:
2880:
2873:
2868:
2862:
2855:
2854:
2853:
2839:
2825:
2811:
2808:Arizona portal
2795:
2792:
2784:Charlie Haeger
2775:
2774:Charlie Haeger
2772:
2763:
2758:
2746:
2745:
2738:
2737:
2736:
2692:Main article:
2689:
2686:
2672:
2669:
2667:
2664:
2613:and danger of
2545:
2542:
2536:
2533:
2525:
2524:
2517:
2516:
2515:
2432:Kaibab Plateau
2427:
2424:
2383:rock squirrels
2232:
2229:
2217:garden spiders
2013:mountain lions
1991:spotted skunks
1892:catclaw acacia
1871:
1868:
1858:
1855:
1830:
1827:
1803:Sonoran Desert
1753:
1750:
1748:
1745:
1716:
1715:Climate change
1713:
1701:
1693:
1689:
1680:
1624:westerly winds
1595:
1592:
1537:
1534:
1533:
1532:
1522:
1512:
1509:Lookout Studio
1506:
1472:
1471:
1463:
1449:
1441:El Tovar Hotel
1437:
1419:
1389:
1386:
1300:Woodrow Wilson
1252:. 1994 photo,
1248:, Facing WNW,
1246:El Tovar Hotel
1237:
1234:
1233:
1232:
1222:
1216:
1209:John Doyle Lee
1205:
1200:"The Hermit",
1174:
1171:
1065:War Department
993:
990:
916:
913:
911:
908:
802:Pueblo peoples
763:
760:
744:Main article:
741:
738:
673:
670:
651:terraced walls
586:. Many of the
503:in 2008, used
452:Main article:
449:
446:
442:State Route 67
433:Kaibab Plateau
368:
365:
292:Colorado River
290:carved by the
278:
277:
275:Colorado River
272:
268:
267:
234:
228:
227:
224:
220:
219:
214:
210:
209:
205:
204:
201:
197:
196:
192:
191:
188:
184:
183:
180:
176:
175:
172:
168:
167:
157:
151:
150:
143:
142:
136:
135:
134:
133:
124:
118:
117:
110:
109:
103:
102:
101:
100:
91:
85:
84:
77:
76:
70:
69:
68:
67:
66:
63:
62:
55:Colorado River
52:
44:
43:
26:
9:
6:
4:
3:
2:
12171:
12160:
12157:
12155:
12152:
12150:
12147:
12145:
12142:
12140:
12137:
12135:
12132:
12130:
12127:
12125:
12122:
12120:
12117:
12115:
12112:
12111:
12109:
12094:
12086:
12085:
12082:
12081:
12077:
12075:
12074:
12070:
12069:
12066:
12060:
12057:
12055:
12052:
12050:
12047:
12046:
12044:
12040:
12033:
12030:
12027:
12024:
12022:(grandfather)
12021:
12018:
12015:
12012:
12009:
12006:
12003:
12000:
11997:
11994:
11991:
11988:
11985:
11982:
11979:
11976:
11975:
11973:
11969:
11962:
11961:
11957:
11954:
11953:
11949:
11946:
11945:
11941:
11938:
11937:
11933:
11931:(1965 series)
11930:
11929:
11925:
11922:
11921:
11917:
11916:
11914:
11908:
11902:
11899:
11897:
11894:
11892:
11889:
11887:
11884:
11881:
11878:
11875:
11874:Wilson Square
11872:
11869:
11868:
11864:
11862:
11861:
11857:
11855:
11852:
11850:
11847:
11845:
11842:
11838:
11837:
11833:
11832:
11831:
11828:
11826:
11823:
11821:
11818:
11816:
11813:
11812:
11810:
11807:
11800:
11794:
11791:
11789:
11786:
11784:
11781:
11779:
11776:
11774:
11771:
11770:
11768:
11766:
11762:
11756:
11754:
11750:
11747:
11744:
11741:
11738:
11737:
11735:
11731:
11725:
11722:
11720:
11717:
11715:
11712:
11710:
11707:
11705:
11702:
11700:
11697:
11695:
11692:
11688:
11685:
11684:
11683:
11680:
11679:
11677:
11673:
11663:
11660:
11658:
11655:
11651:
11647:
11646:
11645:
11642:
11638:
11634:
11633:
11632:
11629:
11626:
11623:
11620:
11617:
11615:
11612:
11610:
11607:
11605:
11602:
11600:
11597:
11593:
11592:USRA standard
11589:
11588:
11587:
11584:
11580:
11576:
11575:
11574:
11571:
11569:
11566:
11564:
11561:
11559:
11556:
11554:
11551:
11548:
11545:
11542:
11539:
11537:
11534:
11532:
11529:
11525:
11521:
11520:
11519:
11516:
11513:
11510:
11508:
11505:
11502:
11499:
11495:
11492:
11490:
11486:
11485:
11484:
11481:
11478:
11475:
11473:
11470:
11468:
11465:
11463:
11460:
11457:
11454:
11451:
11448:
11445:
11442:
11439:
11436:
11433:
11430:
11428:
11425:
11422:
11419:
11417:
11414:
11410:
11407:
11406:
11405:
11402:
11399:
11396:
11393:
11390:
11388:
11385:
11383:
11380:
11377:
11374:
11370:
11367:
11365:
11362:
11360:
11357:
11355:
11352:
11351:
11350:
11347:
11343:
11340:
11339:
11338:
11335:
11332:
11329:
11325:
11321:
11320:
11319:
11316:
11312:
11308:
11307:
11306:
11303:
11301:
11298:
11297:
11295:
11293:
11289:
11282:
11279:
11275:
11271:
11270:
11269:
11266:
11262:
11258:
11257:
11256:
11253:
11250:
11249:Pueblo speech
11247:
11243:
11239:
11238:
11237:
11234:
11232:
11229:
11227:
11224:
11221:
11218:
11216:
11213:
11211:
11208:
11206:
11203:
11201:
11198:
11196:
11193:
11189:
11186:
11184:
11181:
11179:
11176:
11174:
11171:
11169:
11166:
11164:
11161:
11159:
11156:
11154:
11151:
11149:
11145:
11144:
11143:
11140:
11137:
11134:
11130:
11127:
11126:
11125:
11122:
11119:
11116:
11113:
11110:
11107:
11104:
11102:
11099:
11098:
11096:
11094:
11090:
11084:
11081:
11079:
11076:
11074:
11071:
11069:
11066:
11064:
11061:
11059:
11056:
11054:
11051:
11047:
11044:
11042:
11039:
11038:
11037:
11034:
11032:
11029:
11027:
11024:
11020:
11017:
11015:
11012:
11011:
11010:
11007:
11005:
11002:
11000:
10997:
10995:
10992:
10990:
10987:
10986:
10984:
10981:
10976:
10972:
10964:
10959:
10955:
10952:
10948:
10944:
10941:
10937:
10936:
10933:
10929:
10922:
10917:
10915:
10910:
10908:
10903:
10902:
10899:
10887:
10884:
10882:
10879:
10877:
10874:
10872:
10869:
10867:
10864:
10862:
10859:
10857:
10854:
10852:
10849:
10847:
10844:
10842:
10841:
10837:
10836:
10834:
10830:
10824:
10821:
10819:
10816:
10814:
10811:
10809:
10806:
10804:
10801:
10799:
10796:
10794:
10791:
10789:
10786:
10785:
10783:
10779:
10769:
10766:
10764:
10761:
10759:
10756:
10754:
10751:
10749:
10746:
10745:
10743:
10739:
10733:
10730:
10728:
10725:
10723:
10720:
10718:
10715:
10713:
10710:
10708:
10705:
10703:
10700:
10699:
10697:
10693:Aqueducts and
10691:
10685:
10682:
10680:
10677:
10675:
10672:
10670:
10667:
10665:
10662:
10660:
10657:
10655:
10652:
10650:
10647:
10645:
10642:
10640:
10637:
10635:
10632:
10631:
10629:
10625:
10619:
10616:
10614:
10611:
10609:
10606:
10604:
10601:
10599:
10598:Headgate Rock
10596:
10594:
10591:
10589:
10586:
10584:
10581:
10579:
10576:
10574:
10571:
10569:
10566:
10564:
10561:
10559:
10556:
10554:
10551:
10550:
10548:
10546:
10545:Mainstem dams
10542:
10539:
10535:
10529:
10526:
10524:
10523:Williams Fork
10521:
10519:
10516:
10514:
10511:
10509:
10508:Tapeats Creek
10505:
10504:Thunder River
10502:
10500:
10497:
10495:
10492:
10490:
10487:
10485:
10482:
10480:
10477:
10475:
10472:
10470:
10467:
10465:
10462:
10460:
10457:
10455:
10452:
10450:
10447:
10445:
10444:Dolores River
10442:
10440:
10437:
10435:
10432:
10431:
10429:
10427:
10423:
10417:
10414:
10412:
10409:
10407:
10404:
10402:
10399:
10397:
10394:
10392:
10389:
10387:
10384:
10382:
10379:
10377:
10374:
10372:
10371:Parker Valley
10369:
10367:
10366:Mohave Valley
10364:
10362:
10359:
10357:
10356:Mojave Desert
10354:
10352:
10349:
10347:
10344:
10342:
10339:
10337:
10334:
10332:
10329:
10327:
10324:
10322:
10319:
10318:
10316:
10312:
10306:Mohave Canyon
10305:
10303:
10300:
10298:
10295:
10293:
10290:
10288:Virgin Canyon
10287:
10284:
10281:
10274:
10269:
10266:Granite Gorge
10264:
10261:
10260:Marble Canyon
10257:
10256:
10255:
10252:
10250:
10247:
10245:Narrow Canyon
10244:
10242:
10239:
10237:
10234:
10232:
10229:
10226:
10224:
10221:
10219:
10216:
10213:
10211:
10208:
10206:
10203:
10202:
10200:
10196:
10191:
10185:
10179:
10173:
10167:
10154:
10150:
10147:
10143:
10142:
10140:
10135:
10131:
10128:
10124:
10121:
10117:
10114:
10110:
10107:
10103:
10100:
10096:
10093:
10089:
10088:
10086:
10085:
10083:
10081:Jurisdictions
10079:
10074:
10067:
10062:
10060:
10055:
10053:
10048:
10047:
10044:
10034:
10033:
10020:
10014:
10011:
10009:
10006:
10002:
9999:
9997:
9994:
9992:
9989:
9988:
9987:
9984:
9982:
9979:
9977:
9974:
9972:
9969:
9967:
9964:
9962:
9959:
9957:
9954:
9952:
9949:
9947:
9944:
9942:
9939:
9938:
9936:
9934:
9930:
9924:
9921:
9919:
9916:
9914:
9911:
9909:
9906:
9904:
9901:
9899:
9896:
9894:
9891:
9889:
9886:
9884:
9881:
9879:
9876:
9874:
9871:
9869:
9866:
9864:
9861:
9859:
9856:
9854:
9851:
9849:
9846:
9844:
9841:
9839:
9836:
9834:
9833:Bullhead City
9831:
9829:
9826:
9824:
9821:
9820:
9818:
9816:
9812:
9806:
9803:
9801:
9798:
9796:
9793:
9791:
9788:
9786:
9783:
9781:
9778:
9776:
9773:
9771:
9768:
9766:
9763:
9761:
9758:
9756:
9753:
9751:
9748:
9746:
9743:
9741:
9738:
9736:
9733:
9732:
9730:
9728:
9724:
9718:
9715:
9713:
9710:
9708:
9705:
9701:
9698:
9697:
9696:
9693:
9691:
9688:
9686:
9683:
9681:
9678:
9676:
9673:
9671:
9668:
9666:
9663:
9661:
9658:
9656:
9653:
9651:
9648:
9646:
9645:Mojave Desert
9643:
9641:
9638:
9636:
9633:
9631:
9628:
9626:
9623:
9621:
9618:
9616:
9613:
9611:
9608:
9606:
9605:Arizona Strip
9603:
9602:
9600:
9598:
9594:
9588:
9585:
9583:
9580:
9578:
9575:
9573:
9570:
9568:
9565:
9563:
9560:
9558:
9555:
9553:
9550:
9548:
9545:
9543:
9540:
9538:
9535:
9533:
9530:
9529:
9527:
9523:
9517:
9514:
9512:
9509:
9507:
9504:
9502:
9499:
9497:
9494:
9492:
9489:
9487:
9484:
9480:
9477:
9475:
9472:
9471:
9470:
9467:
9465:
9462:
9458:
9455:
9453:
9450:
9448:
9445:
9444:
9443:
9440:
9438:
9435:
9433:
9430:
9429:
9427:
9425:
9421:
9416:
9415:
9409:
9405:
9401:
9394:
9389:
9387:
9382:
9380:
9375:
9374:
9371:
9359:
9356:
9354:
9353:
9349:
9347:
9346:
9342:
9340:
9339:
9335:
9333:
9331:
9327:
9324:
9323:
9319:
9317:
9315:
9311:
9309:
9308:
9304:
9302:
9301:
9297:
9295:
9292:
9290:
9287:
9285:
9282:
9280:
9277:
9276:
9274:
9270:
9264:
9261:
9259:
9256:
9254:
9251:
9250:
9248:
9246:
9242:
9236:
9233:
9231:
9228:
9227:
9225:
9221:
9215:
9212:
9210:
9207:
9205:
9202:
9200:
9197:
9196:
9194:
9190:
9184:
9181:
9179:
9176:
9174:
9171:
9167:
9164:
9163:
9162:
9159:
9157:
9154:
9152:
9149:
9148:
9146:
9142:
9136:
9133:
9131:
9130:Vishnu Temple
9128:
9126:
9123:
9121:
9118:
9116:
9113:
9111:
9108:
9104:
9101:
9100:
9099:
9096:
9094:
9091:
9089:
9088:Tanner Graben
9086:
9084:
9081:
9079:
9076:
9074:
9071:
9069:
9066:
9064:
9063:Kanab Plateau
9061:
9059:
9056:
9054:
9051:
9049:
9046:
9044:
9043:Hakatai Shale
9041:
9039:
9036:
9034:
9031:
9025:
9022:
9020:
9017:
9016:
9015:
9012:
9010:
9007:
9005:
9002:
9000:
8997:
8996:
8995:
8992:
8990:
8987:
8985:
8982:
8980:
8977:
8975:
8972:
8970:
8967:
8965:
8964:Dox Formation
8962:
8960:
8957:
8955:
8954:Bat Cave mine
8952:
8950:
8949:Apollo Temple
8947:
8945:
8942:
8941:
8939:
8937:
8933:
8927:
8926:Phantom Ranch
8924:
8922:
8919:
8917:
8914:
8912:
8909:
8907:
8904:
8902:
8899:
8897:
8894:
8892:
8889:
8887:
8884:
8882:
8879:
8878:
8876:
8872:
8868:
8861:
8856:
8854:
8849:
8847:
8842:
8841:
8838:
8832:
8829:
8826:
8823:
8821:
8818:
8817:
8816:
8815:
8808:
8804:
8801:
8799:
8796:
8795:
8794:
8793:
8786:
8783:
8780:
8776:
8773:
8770:
8769:
8768:
8767:
8761:
8760:OpenStreetMap
8757:
8748:
8746:
8743:
8741:
8738:
8737:
8731:
8727:
8723:
8720:
8719:Public domain
8711:
8706:
8683:
8679:
8675:
8668:
8660:
8654:
8650:
8643:
8635:
8629:
8625:
8618:
8610:
8606:
8605:Bloomberg.com
8602:
8595:
8587:
8583:
8576:
8560:
8556:
8552:
8546:
8540:
8536:
8533:
8529:
8528:
8523:
8517:
8501:
8497:
8493:
8487:
8485:
8468:
8464:
8463:
8458:
8451:
8435:
8431:
8427:
8421:
8402:
8395:
8389:
8381:
8377:
8371:
8352:
8345:
8339:
8331:
8327:
8323:
8318:
8307:
8305:
8303:
8301:
8299:
8297:
8295:
8279:
8275:
8271:
8266:
8255:
8253:
8251:
8235:
8231:
8227:
8222:
8211:
8209:
8207:
8205:
8189:
8185:
8181:
8176:
8165:
8163:
8161:
8159:
8157:
8141:
8137:
8133:
8132:"Crustaceans"
8128:
8117:
8102:
8098:
8094:
8089:
8078:
8076:
8074:
8058:
8054:
8050:
8045:
8034:
8019:
8015:
8011:
8006:
7995:
7993:
7991:
7989:
7987:
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7983:
7981:
7979:
7977:
7975:
7973:
7971:
7955:
7951:
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7931:
7929:
7927:
7925:
7923:
7921:
7919:
7917:
7915:
7913:
7911:
7895:
7891:
7887:
7882:
7871:
7869:
7867:
7865:
7863:
7861:
7859:
7857:
7855:
7853:
7851:
7849:
7847:
7845:
7843:
7841:
7839:
7822:
7818:
7814:
7808:
7797:
7793:
7786:
7779:
7763:
7759:
7755:
7748:
7746:
7729:
7725:
7721:
7714:
7712:
7703:
7699:
7695:
7691:
7687:
7683:
7679:
7675:
7668:
7652:
7648:
7644:
7638:
7630:
7626:
7622:
7618:
7614:
7610:
7605:
7600:
7596:
7592:
7588:
7584:
7580:
7573:
7557:
7553:
7549:
7542:
7534:
7530:
7525:
7520:
7516:
7512:
7508:
7504:
7500:
7493:
7477:
7473:
7469:
7463:
7452:
7448:
7441:
7435:
7433:
7416:
7412:
7406:
7387:
7380:
7374:
7355:
7348:
7342:
7323:
7316:
7315:
7307:
7291:
7287:
7283:
7279:
7275:
7271:
7267:
7263:
7259:
7255:
7251:
7247:
7243:
7238:
7230:
7214:
7210:
7209:
7201:
7185:
7181:
7174:
7155:
7148:
7142:
7126:
7122:
7116:
7097:
7090:
7084:
7065:
7058:
7051:
7032:
7028:
7021:
7015:
6996:
6989:
6988:
6981:
6965:
6961:
6957:
6953:
6949:
6945:
6941:
6937:
6933:
6929:
6925:
6921:
6917:
6912:
6904:
6888:
6884:
6880:
6873:
6871:
6854:
6850:
6846:
6840:
6824:
6820:
6816:
6810:
6803:
6789:
6785:
6779:
6777:
6757:
6750:
6744:
6725:
6718:
6712:
6696:
6692:
6686:
6670:
6666:
6660:
6644:
6640:
6634:
6618:
6614:
6608:
6600:
6596:
6590:
6588:
6579:
6575:
6569:
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6523:
6519:
6515:
6508:
6500:
6493:
6477:
6473:
6469:
6463:
6447:
6443:
6437:
6433:
6432:
6424:
6416:
6409:
6393:
6389:
6385:
6379:
6360:
6356:
6350:
6343:
6342:
6334:
6318:
6314:
6308:
6304:
6303:
6295:
6279:
6275:
6271:
6265:
6257:
6253:
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6223:
6219:
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6211:
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6200:
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6169:
6153:
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6138:
6122:
6118:
6114:
6107:
6091:
6087:
6083:
6076:
6060:
6056:
6052:
6046:
6044:
6024:
6020:
6013:
6007:
6005:
5996:
5992:
5988:
5981:
5979:
5962:
5958:
5954:
5947:
5931:
5927:
5923:
5917:
5909:
5905:
5898:
5882:
5878:
5874:
5867:
5851:
5847:
5843:
5836:
5820:
5816:
5812:
5806:
5804:
5787:
5783:
5779:
5772:
5764:
5758:
5754:
5747:
5745:
5743:
5741:
5739:
5730:
5724:
5720:
5713:
5711:
5709:
5707:
5705:
5696:
5690:
5686:
5679:
5663:
5659:
5655:
5651:
5647:
5643:
5639:
5635:
5628:
5612:
5608:
5604:
5598:
5582:
5578:
5574:
5568:
5552:
5548:
5544:
5538:
5522:
5518:
5514:
5513:"Seth Tanner"
5508:
5492:
5488:
5484:
5477:
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5447:
5431:
5427:
5423:
5416:
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5364:
5357:
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4013:
3997:
3993:
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3560:
3551:
3547:
3543:
3539:
3535:
3531:
3524:
3508:
3504:
3500:
3497:Montmoli, C.
3493:
3474:
3467:
3466:
3458:
3450:
3446:
3441:
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3255:
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3139:
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3107:
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3100:
3094:
3087:
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3034:
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3026:
3022:
3018:
3014:
3010:
3006:
2999:
2997:
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2979:
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2963:
2959:
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2878:
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2866:
2863:
2860:
2859:Copper Canyon
2857:
2856:
2851:
2850:Rivers portal
2840:
2837:
2826:
2823:
2812:
2809:
2798:
2791:
2789:
2785:
2781:
2771:
2769:
2762:
2761:Over the Edge
2753:
2752:O'Neill Butte
2748:
2742:
2735:
2733:
2728:
2726:
2722:
2717:
2714:
2711:
2707:
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2699:
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2364:
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2329:
2325:
2324:red squirrels
2321:
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2296:
2292:
2290:
2286:
2282:
2276:
2274:
2270:
2266:
2262:
2258:
2250:
2249:Marble Canyon
2246:
2245:Navajo Bridge
2242:
2237:
2228:
2226:
2222:
2218:
2214:
2210:
2206:
2202:
2198:
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2171:
2166:
2164:
2160:
2156:
2152:
2151:big sagebrush
2148:
2144:
2140:
2136:
2132:
2131:white bursage
2128:
2127:creosote bush
2123:
2121:
2117:
2113:
2112:gila monsters
2107:
2105:
2101:
2097:
2093:
2089:
2084:
2082:
2078:
2077:bark scorpion
2074:
2070:
2066:
2062:
2058:
2054:
2050:
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2042:
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2034:
2029:
2026:
2022:
2018:
2014:
2010:
2006:
2002:
1998:
1994:
1992:
1988:
1984:
1980:
1976:
1972:
1968:
1964:
1960:
1958:
1953:
1950:
1949:Leopard frogs
1946:
1942:
1938:
1930:
1925:
1921:
1919:
1915:
1914:humpback chub
1911:
1910:
1905:
1904:stream orchid
1901:
1897:
1894:, and exotic
1893:
1889:
1885:
1881:
1877:
1876:Coyote willow
1870:Lower Sonoran
1867:
1864:
1854:
1852:
1848:
1840:
1835:
1826:
1822:
1820:
1814:
1812:
1808:
1804:
1800:
1799:Mojave Desert
1778:
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1666:
1663:
1660:In 1999, the
1658:
1656:
1652:
1648:
1647:Clean Air Act
1643:
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1544:
1543:precipitation
1530:
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1500:
1495:
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1464:
1461:
1457:
1454:was built by
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1210:
1206:
1203:
1199:
1198:Louis Boucher
1195:
1191:
1190:
1179:
1170:
1167:
1165:
1161:
1160:Marble Canyon
1157:
1152:
1149:
1146:and incoming
1145:
1139:
1137:
1133:
1129:
1125:
1120:
1115:
1113:
1108:
1106:
1105:
1096:
1095:Marble Canyon
1093:Noon rest in
1091:
1087:
1085:
1080:
1076:
1075:
1071:
1066:
1061:
1058:
1054:
1050:
1043:
1039:
1035:
1031:
1029:
1025:
1021:
1017:
1013:
1009:
1008:Brigham Young
1005:
1001:
1000:Jacob Hamblin
997:
989:
985:
983:
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971:
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558:
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553:Vishnu Schist
549:
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531:
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353:Pueblo people
349:
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323:Navajo Nation
320:
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259:36.3; -112.75
235:
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226:United States
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140:
107:
74:
64:
60:
56:
50:
45:
40:
37:
33:
19:
12114:Grand Canyon
12078:
12071:
12034:(son-in-law)
12020:James Wilson
11958:
11951:
11942:
11934:
11927:
11919:
11865:
11858:
11849:High schools
11834:
11815:Bibliography
11752:
11745:
11739:
11714:Shadow Lawn)
11613:
11101:Wilsonianism
10856:Floyd Dominy
10838:
10768:Yuma Project
10568:Grand Valley
10513:Virgin River
10459:Fraser River
10321:River course
10297:Black Canyon
10254:Grand Canyon
10253:
10205:Byers Canyon
10023:
10008:World War II
9956:Hualapai War
9908:Sierra Vista
9712:Verde Valley
9680:Safford area
9640:Mogollon Rim
9625:Grand Canyon
9624:
9587:Homelessness
9552:Demographics
9447:Constitution
9412:
9350:
9343:
9336:
9330:Grand Canyon
9329:
9320:
9314:Grand Canyon
9313:
9305:
9298:
9166:Havasu Falls
9161:Havasu Creek
9125:Venus Temple
9093:Temple Butte
9078:Prospect Dam
9068:Newton Butte
9038:Freya Castle
8921:Maswik Lodge
8867:Grand Canyon
8866:
8813:
8812:
8806:
8791:
8790:
8765:
8764:
8756:Grand Canyon
8686:. Retrieved
8677:
8667:
8648:
8642:
8623:
8617:
8604:
8594:
8575:
8563:. Retrieved
8554:
8545:
8525:
8516:
8504:. Retrieved
8495:
8471:. Retrieved
8460:
8450:
8438:. Retrieved
8429:
8420:
8410:November 28,
8408:. Retrieved
8388:
8370:
8358:. Retrieved
8351:the original
8338:
8325:
8281:. Retrieved
8273:
8237:. Retrieved
8229:
8191:. Retrieved
8183:
8143:. Retrieved
8135:
8116:
8104:. Retrieved
8096:
8093:"Amphibians"
8060:. Retrieved
8052:
8033:
8021:. Retrieved
8013:
7957:. Retrieved
7949:
7897:. Retrieved
7889:
7825:. Retrieved
7817:www.usgs.gov
7816:
7807:
7791:
7778:
7766:. Retrieved
7757:
7732:. Retrieved
7723:
7677:
7673:
7667:
7655:. Retrieved
7646:
7637:
7586:
7582:
7572:
7560:. Retrieved
7551:
7541:
7506:
7502:
7492:
7480:. Retrieved
7471:
7462:
7446:
7419:. Retrieved
7415:the original
7405:
7393:. Retrieved
7373:
7361:. Retrieved
7341:
7329:. Retrieved
7313:
7306:
7294:. Retrieved
7245:
7241:
7229:
7217:. Retrieved
7207:
7200:
7188:. Retrieved
7173:
7161:. Retrieved
7141:
7129:. Retrieved
7115:
7103:. Retrieved
7083:
7071:. Retrieved
7064:the original
7050:
7038:. Retrieved
7026:
7014:
7002:. Retrieved
6986:
6980:
6968:. Retrieved
6919:
6915:
6903:
6891:. Retrieved
6882:
6857:. Retrieved
6848:
6839:
6827:. Retrieved
6818:
6809:
6792:. Retrieved
6788:the original
6763:. Retrieved
6756:the original
6743:
6731:. Retrieved
6711:
6699:. Retrieved
6685:
6673:. Retrieved
6659:
6647:. Retrieved
6633:
6621:. Retrieved
6607:
6599:the original
6568:
6556:. Retrieved
6548:Canyon Tours
6547:
6538:
6526:. Retrieved
6517:
6507:
6498:
6492:
6480:. Retrieved
6471:
6462:
6450:. Retrieved
6430:
6423:
6414:
6408:
6396:. Retrieved
6387:
6378:
6366:. Retrieved
6340:
6333:
6321:. Retrieved
6305:. ABC-CLIO.
6301:
6294:
6282:. Retrieved
6273:
6264:
6216:(1): 22157.
6213:
6209:
6199:
6187:. Retrieved
6178:
6168:
6156:. Retrieved
6147:
6137:
6125:. Retrieved
6116:
6106:
6094:. Retrieved
6085:
6075:
6063:. Retrieved
6054:
6030:. Retrieved
6018:
5991:The Guardian
5990:
5965:. Retrieved
5956:
5946:
5934:. Retrieved
5925:
5916:
5908:the original
5897:
5885:. Retrieved
5876:
5866:
5856:February 24,
5854:. Retrieved
5845:
5835:
5823:. Retrieved
5814:
5790:. Retrieved
5781:
5771:
5752:
5718:
5684:
5678:
5666:. Retrieved
5641:
5637:
5627:
5615:. Retrieved
5606:
5597:
5585:. Retrieved
5577:tchester.org
5576:
5567:
5555:. Retrieved
5546:
5537:
5525:. Retrieved
5516:
5507:
5495:. Retrieved
5486:
5476:
5464:. Retrieved
5455:
5446:
5434:. Retrieved
5425:
5415:
5402:
5393:
5381:. Retrieved
5377:the original
5372:
5363:
5347:
5342:
5330:. Retrieved
5321:
5312:
5300:. Retrieved
5291:
5282:
5270:. Retrieved
5258:
5245:
5233:. Retrieved
5224:
5214:
5202:. Retrieved
5198:the original
5193:
5167:. Retrieved
5158:
5149:
5137:. Retrieved
5128:
5118:
5106:. Retrieved
5096:
5089:
5077:. Retrieved
5057:
5050:
5038:. Retrieved
5028:
5021:
5009:. Retrieved
5000:
4990:
4978:. Retrieved
4969:
4960:
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4932:
4925:
4913:. Retrieved
4903:
4896:
4884:. Retrieved
4875:
4866:
4854:. Retrieved
4845:
4821:. Retrieved
4812:
4803:
4791:. Retrieved
4782:
4778:
4768:
4756:. Retrieved
4739:
4735:
4725:
4700:
4677:. Retrieved
4653:
4646:
4634:. Retrieved
4620:
4599:
4591:
4576:
4568:
4556:. Retrieved
4552:the original
4542:
4523:
4502:. Retrieved
4498:the original
4493:
4484:
4461:
4450:
4440:December 25,
4438:. Retrieved
4429:
4419:
4407:. Retrieved
4374:
4370:
4358:
4346:. Retrieved
4338:ScienceDaily
4337:
4328:
4285:
4281:
4271:
4259:. Retrieved
4243:
4221:. Retrieved
4209:
4196:
4184:. Retrieved
4169:
4157:. Retrieved
4148:
4138:
4126:. Retrieved
4117:
4107:
4095:. Retrieved
4091:the original
4086:
4077:
4026:
4022:
4012:
4000:. Retrieved
3991:
3981:
3969:. Retrieved
3936:
3933:GSA Bulletin
3932:
3920:
3908:. Retrieved
3899:
3874:. Retrieved
3830:
3826:
3813:
3801:. Retrieved
3792:
3783:
3771:. Retrieved
3762:
3752:
3740:. Retrieved
3731:
3721:
3709:. Retrieved
3700:
3690:
3649:
3643:
3627:
3615:. Retrieved
3606:
3597:
3584:
3533:
3529:
3523:
3511:. Retrieved
3502:
3492:
3480:. Retrieved
3464:
3457:
3422:
3418:
3393:. Retrieved
3389:the original
3384:
3375:
3351:
3344:
3317:
3313:
3303:
3276:
3272:
3262:
3243:
3237:
3218:
3206:. Retrieved
3187:
3142:. Retrieved
3122:
3093:
3085:
3080:
3072:
3067:
3055:. Retrieved
3041:
3008:
3004:
2945:
2910:
2903:
2875:
2865:Verdon Gorge
2777:
2767:
2765:
2760:
2754:on the left.
2729:
2725:Chuar Buttes
2718:
2713:Douglas DC-7
2700:
2697:
2682:
2657:
2654:
2647:
2620:
2607:
2563:
2538:
2488:
2456:mountain ash
2429:
2387:Utah juniper
2379:
2344:
2313:
2277:
2254:
2213:wood spiders
2178:
2167:
2124:
2108:
2085:
2030:
2025:feral burros
1995:
1963:River otters
1961:
1954:
1934:
1907:
1873:
1860:
1844:
1823:
1815:
1796:
1755:
1738:
1734:
1730:
1726:
1706:
1678:
1659:
1644:
1640:black carbon
1621:
1617:
1605:
1588:
1576:
1560:
1539:
1467:John Verkamp
1391:
1382:
1371:
1362:
1361:
1353:
1350:
1333:
1311:
1304:
1272:
1207:Lees Ferry:
1181:David Rust,
1168:
1153:
1140:
1116:
1109:
1102:
1100:
1078:
1073:
1062:
1046:
1038:William Bell
1020:Pearce Ferry
998:
995:
986:
963:
944:conquistador
941:
923:
886:people near
852:
829:
806:
785:
772:Four Corners
765:
734:
730:
719:
710:
698:permeability
687:
659:
632:
625:
605:
573:
569:unconformity
550:
538:
527:
513:
498:
492:
485:
477:
472:mass wasting
438:
429:
409:
350:
335:
329:. President
300:
284:Grand Canyon
283:
281:
152:Grand Canyon
119:Grand Canyon
86:Grand Canyon
42:Grand Canyon
36:
11955:(2013 book)
11923:(1944 film)
11456:Adamson Act
11292:New Freedom
11240:1919â1920;
11178:The Inquiry
11146:1917â1918;
11142:World War I
11120:(1916â1924)
11114:(1915â1934)
10965:(1902â1910)
10956:(1911â1913)
10945:(1913â1921)
10861:Lee's Ferry
10727:Alamo Canal
10702:Grand Ditch
10669:Lake Havasu
10664:Lake Mohave
10654:Lake Powell
10649:Navajo Lake
10578:Glen Canyon
10573:Price-Stubb
10537:Engineering
10489:Paria River
10479:Kanab Creek
10469:Green River
10454:Eagle River
10426:Tributaries
10386:Alamo River
10249:Glen Canyon
10231:Ruby Canyon
10210:Gore Canyon
9838:Casa Grande
9577:LGBT rights
9457:Legislature
9432:Agriculture
9316:(1958 film)
9209:Kenton Grua
9173:Kanab Creek
9098:Tonto Group
9073:Ochoa Point
9058:Isis Temple
9014:Unkar Group
8999:Chuar Group
8911:Kolb Studio
8506:October 22,
8283:October 22,
8239:October 22,
8193:October 22,
8145:October 22,
8106:October 22,
8062:October 22,
8023:October 22,
7959:October 22,
7899:October 22,
7647:www.nps.gov
6701:October 22,
6675:October 22,
6649:October 22,
5782:JSTOR Daily
5383:November 7,
5129:Listen2Read
5100:. Methuen.
4679:October 25,
4504:October 22,
4186:October 22,
4097:December 2,
3910:January 22,
3773:February 6,
3633:B. Wernicke
3617:January 21,
3395:October 22,
2599:Guano Point
2499:big galleta
2495:black grama
2444:Douglas fir
2440:blue spruce
2371:needlegrass
2195:, beetles,
2135:brittlebush
2120:rattlesnake
2116:chuckwallas
2100:land snails
2061:butterflies
2049:black flies
2037:caddisflies
1979:pocket mice
1952:organisms.
1929:bighorn ewe
1884:seep-willow
1839:bighorn ram
1811:pinyon pine
1609:dust storms
1594:Air quality
1572:hypothermia
1564:dehydration
1478:1923-built
1422:Kolb Studio
1337:Ken Salazar
1268:Hermit Camp
1264:Fred Harvey
1220:Mary Colter
1202:Seth Tanner
1186: 1910
1128:Green River
982:Lake Powell
926:(2017), by
900:Third World
796:during the
694:water table
690:Groundwater
641:opened and
601:Supai Group
507:to analyze
416:Proterozoic
396:Lake Powell
357:pilgrimages
257: /
232:Coordinates
12108:Categories
12010:(grandson)
12004:(daughter)
11998:(daughter)
11619:Red Summer
11376:Sabath Act
11158:home front
10989:Transition
10975:Presidency
10603:Palo Verde
10464:Gila River
10434:Blue River
10396:Salton Sea
10341:Grand Lake
10120:New Mexico
10099:California
9971:Sheep wars
9961:Mohave War
9898:Scottsdale
9795:Santa Cruz
9442:Government
9214:John Hance
9156:Deer Creek
8874:Facilities
8814:Multimedia
8360:January 4,
8322:"Reptiles"
8270:"Mollusks"
7190:August 22,
6623:January 4,
6284:August 10,
6127:January 7,
5517:All Hikers
4558:January 4,
4478:required.)
4430:id.loc.gov
2987:References
2962:Wi:kaĘźi:la
2788:Scottsdale
2544:Activities
2507:three-awns
2468:cinquefoil
2460:groundsels
2403:elderberry
2391:Gambel oak
2351:Mormon tea
2336:black bear
2316:Porcupines
2281:peregrines
2261:Utah agave
2225:tarantulas
2209:Solifugids
2197:black ants
2193:stink bugs
2185:honey bees
2155:blackbrush
2096:gastropods
2045:stoneflies
2009:gray foxes
1957:bald eagle
1863:life zones
1845:Of the 90
1470:community.
1452:Hopi House
1329:hydropower
1194:John Hance
1136:Moab, Utah
1132:confluence
1016:Lees Ferry
953:, Captain
930:, depicts
896:Third Mesa
884:Athabaskan
840:Salt River
588:formations
518:(U-Th)/He
404:Sentinel-2
11806:memorials
11765:Elections
11724:Gravesite
11541:Smith Act
11331:Raker Act
11153:campaigns
10659:Lake Mead
10563:Windy Gap
10528:RĂo Hardy
10391:New River
10214:Red Gorge
9848:Flagstaff
9567:Elections
9562:Education
9437:Geography
9417:(capital)
9230:Havasupai
8565:April 24,
8440:March 19,
8426:"Skywalk"
8010:"Mammals"
7946:"Animals"
7827:March 25,
7694:0163-7525
7629:211233121
7613:0036-8075
7533:133694146
7270:1096-2247
7131:April 19,
6944:1096-2247
6765:April 16,
6733:April 11,
6238:2045-2322
5650:0007-0106
4659:UNM Press
4457:"Anasazi"
4399:207990859
4320:220260022
4312:1435-0157
4087:3 News NZ
4053:0036-8075
3961:0016-7606
3871:206509716
3855:1095-9203
3682:Q56082876
3674:0016-7606
3449:1553-040X
3419:Geosphere
3314:Geosphere
3273:Geosphere
3057:April 20,
3033:1752-0894
2448:white fir
2359:winterfat
2347:snakeweed
2275:species.
2257:sagebrush
2073:scorpions
2069:fire ants
2017:mule deer
1987:ringtails
1880:arrowweed
1807:ponderosa
1632:road dust
1613:Southwest
1357:v. Jewell
1319:ecosystem
1110:In 1858,
1047:In 1857,
821:Havasupai
702:aquitards
672:Hydrology
420:Paleozoic
400:Lake Mead
367:Geography
208:Geography
12093:Category
12016:(father)
11882:(Prague)
11876:(Warsaw)
11501:Flag Day
11261:Big Four
10980:timeline
10608:Imperial
10106:Colorado
9986:Timeline
9903:Surprise
9893:Prescott
9863:Goodyear
9858:Glendale
9843:Chandler
9823:Avondale
9770:Maricopa
9760:Greenlee
9745:Coconino
9727:Counties
9582:Politics
9572:Gun laws
9532:Abortion
9474:Senators
9452:Governor
9235:Hualapai
8775:Archived
8682:Archived
8609:Archived
8586:Archived
8559:Archived
8555:NBC News
8535:Archived
8530:, 2015.
8500:Archived
8473:March 5,
8467:Archived
8434:Archived
8401:Archived
8380:Archived
7886:"Plants"
7821:Archived
7796:Archived
7768:June 24,
7762:Archived
7728:Archived
7702:10884953
7657:March 6,
7651:Archived
7621:32079679
7562:June 24,
7556:Archived
7482:March 6,
7476:Archived
7472:USAFacts
7451:Archived
7421:July 30,
7395:July 30,
7386:Archived
7363:July 26,
7354:Archived
7331:June 24,
7322:Archived
7296:June 24,
7290:Archived
7286:31615461
7278:16350365
7219:June 24,
7213:Archived
7184:Archived
7163:July 26,
7154:Archived
7125:Archived
7096:Archived
7040:June 24,
7031:Archived
7004:June 24,
6995:Archived
6970:June 24,
6964:Archived
6960:42362472
6952:19785274
6893:June 24,
6887:Archived
6859:June 24,
6853:Archived
6829:June 24,
6823:Archived
6794:June 27,
6724:Archived
6695:Archived
6669:Archived
6643:Archived
6617:Archived
6578:Archived
6552:Archived
6522:Archived
6476:Archived
6446:Archived
6392:Archived
6359:Archived
6317:Archived
6278:Archived
6256:34785687
6189:June 30,
6183:Archived
6158:June 30,
6152:Archived
6121:Archived
6096:June 30,
6090:Archived
6065:June 30,
6059:Archived
6032:June 30,
6023:Archived
5995:Archived
5967:June 23,
5961:Archived
5936:June 24,
5930:Archived
5881:Archived
5850:Archived
5819:Archived
5786:Archived
5662:Archived
5658:43040779
5611:Archived
5581:Archived
5551:Archived
5521:Archived
5491:Archived
5460:Archived
5430:Archived
5407:Archived
5352:Archived
5332:June 21,
5326:Archived
5302:June 21,
5296:Archived
5272:June 21,
5263:Archived
5235:June 21,
5229:Archived
5204:June 21,
5169:June 21,
5163:Archived
5139:June 21,
5133:Archived
5102:Archived
5073:Archived
5034:Archived
5005:Archived
4974:Archived
4950:June 21,
4941:Archived
4915:June 21,
4909:Archived
4886:June 21,
4880:Archived
4856:June 21,
4850:Archived
4823:June 21,
4817:Archived
4793:June 21,
4787:Archived
4758:June 21,
4752:Archived
4748:40167806
4673:Archived
4636:July 30,
4630:Archived
4434:Archived
4403:Archived
4342:Archived
4261:June 30,
4252:Archived
4223:June 30,
4214:Archived
4180:Archived
4159:July 11,
4153:Archived
4128:July 11,
4122:Archived
4118:BBC News
4069:32277486
4061:23196906
4002:June 23,
3996:Archived
3971:June 23,
3965:Archived
3904:Archived
3876:June 23,
3863:18323451
3803:June 23,
3797:Archived
3767:Archived
3742:June 23,
3736:Archived
3711:June 23,
3705:Archived
3678:Wikidata
3611:Archived
3513:July 27,
3507:Archived
3482:June 23,
3473:Archived
3367:Archived
3226:Archived
3208:June 23,
3202:Archived
3144:June 23,
3138:Archived
3102:Archived
3051:Archived
2954:Ăngtupqa
2867:, France
2861:, Mexico
2794:See also
2570:Hualapai
2568:and the
2417:and the
2367:dropseed
2139:ocotillo
2092:bivalves
2088:mollusks
2079:and the
2041:mayflies
1997:Raccoons
1967:muskrats
1916:and the
1896:tamarisk
1711:impact.
1483:No. 4960
1324:tamarisk
1144:Shivwits
1084:Cardinas
1079:Explorer
1074:Explorer
978:Santa Fe
964:Fathers
864:Delaware
838:and the
825:Hualapai
809:Cohonina
706:aquifers
666:volcanic
628:ice ages
346:uplifted
338:channels
321:and the
245:112°45â˛W
213:Location
12042:Related
11912:culture
11910:Popular
11274:charter
11026:Cabinet
10618:Morelos
10198:Canyons
10141:Mexico
10134:Wyoming
10092:Arizona
9996:Phoenix
9933:History
9888:Phoenix
9868:Kingman
9853:Gilbert
9828:Buckeye
9800:Yavapai
9740:Cochise
9597:Regions
9557:Economy
9542:Culture
9525:Society
9506:Symbols
9486:Museums
9414:Phoenix
9404:Arizona
9272:Related
8936:Geology
8766:History
8724:at the
8688:July 7,
8180:"Birds"
7734:July 1,
7591:Bibcode
7583:Science
7511:Bibcode
7250:Bibcode
7105:May 17,
7073:May 28,
6924:Bibcode
6558:July 8,
6528:July 8,
6482:July 8,
6452:July 8,
6398:July 8,
6368:July 8,
6323:July 8,
6247:8595346
6218:Bibcode
6179:Reuters
5887:July 1,
5825:July 8,
5792:July 8,
5668:July 8,
5617:July 8,
5587:July 8,
5557:July 8,
5527:July 8,
5497:July 8,
5466:July 8,
5436:July 8,
5294:. PBS.
5108:May 23,
5079:July 8,
5040:July 8,
5011:July 8,
4980:July 8,
4409:July 1,
4379:Bibcode
4348:July 1,
4290:Bibcode
4031:Bibcode
4023:Science
3941:Bibcode
3835:Bibcode
3827:Science
3793:NPR.org
3654:Bibcode
3538:Bibcode
3427:Bibcode
3322:Bibcode
3281:Bibcode
3013:Bibcode
2958:Yavapai
2782:player
2472:lupines
2201:monarch
2163:woodrat
2143:mariola
2057:beetles
2005:bobcats
2001:weasels
1983:coyotes
1971:Beavers
1851:rodents
1829:Animals
1739:In the
1628:monsoon
1611:in the
1568:sunburn
1536:Weather
1485:at the
1406:in 2004
959:Giralda
902:from a
868:Paiutes
850:clans.
832:Sinagua
740:History
597:aeolian
529:Science
516:apatite
509:calcite
500:Science
448:Geology
296:Arizona
266:
242:36°18â˛N
223:Country
217:Arizona
195:Geology
59:Arizona
11971:Family
11952:Wilson
11920:Wilson
11802:Legacy
11755:(1913)
11748:(1901)
11742:(1900)
11648:1920;
11635:1920;
11627:(1919)
11621:(1919)
11590:1917;
11577:1917;
11549:(1916)
11543:(1916)
11522:1916;
11514:(1916)
11503:(1916)
11487:1916;
11479:(1916)
11458:(1916)
11452:(1915)
11446:(1915)
11440:(1915)
11434:(1914)
11423:(1914)
11400:(1914)
11394:(1914)
11378:(1913)
11333:(1913)
11322:1913;
11309:1913;
11283:(1920)
11272:1920;
11259:1919;
11251:(1919)
11222:(1918)
11138:(1916)
11108:(1914)
10695:canals
10613:Laguna
10593:Parker
10583:Hoover
10558:Granby
10153:Sonora
10113:Nevada
10075:system
10001:Tucson
9918:Tucson
9883:Peoria
9815:Cities
9780:Navajo
9775:Mohave
9765:La Paz
9755:Graham
9735:Apache
9501:People
9424:Topics
9245:Events
9223:Tribes
9192:People
8722:images
8655:
8630:
8532:Source
7700:
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6802:PM-2.5
6438:
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3672:
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3250:
3130:
3031:
2966:Navajo
2721:Temple
2708:and a
2505:, and
2480:asters
2478:, and
2476:sedges
2464:yarrow
2454:, and
2411:fescue
2409:, and
2369:, and
2320:shrews
2269:ratany
2223:, and
2199:, and
2157:, and
2067:, and
2033:midges
2011:, and
1989:, and
1906:, and
1900:redbud
1847:mammal
1770:lichen
1752:Plants
1651:US EPA
1570:, and
1460:Oraibi
1148:Mormon
1004:Mormon
904:sipapu
892:
876:Navajo
860:
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823:, and
781:Navajo
662:
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317:, the
313:, the
305:, the
288:canyon
271:Rivers
179:Length
11960:Suffs
11733:Books
11148:entry
10961:13th
10588:Davis
10406:Delta
9913:Tempe
9790:Pinal
9547:Crime
9491:Music
9464:Index
9400:State
8404:(PDF)
8397:(PDF)
8354:(PDF)
8347:(PDF)
8319:from
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8177:from
8129:from
8090:from
8046:from
8007:from
7943:from
7883:from
7799:(PDF)
7788:(PDF)
7625:S2CID
7529:S2CID
7454:(PDF)
7443:(PDF)
7389:(PDF)
7382:(PDF)
7357:(PDF)
7350:(PDF)
7325:(PDF)
7318:(PDF)
7282:S2CID
7157:(PDF)
7150:(PDF)
7099:(PDF)
7092:(PDF)
7067:(PDF)
7060:(PDF)
7034:(PDF)
7023:(PDF)
6998:(PDF)
6991:(PDF)
6956:S2CID
6759:(PDF)
6752:(PDF)
6727:(PDF)
6720:(PDF)
6362:(PDF)
6345:(PDF)
6026:(PDF)
6015:(PDF)
5654:JSTOR
5348:Grand
5266:(PDF)
5255:(PDF)
4944:(PDF)
4937:(PDF)
4785:(4).
4744:JSTOR
4472:
4395:S2CID
4316:S2CID
4255:(PDF)
4248:(PDF)
4217:(PDF)
4206:(PDF)
4065:S2CID
3867:S2CID
3823:(PDF)
3640:(PDF)
3578:from
3476:(PDF)
3469:(PDF)
2937:Notes
2511:forbs
2452:aspen
2355:Yucca
2285:eyrie
2273:cacti
2104:slugs
2065:moths
2053:mites
1762:fungi
1430:Green
1378:'
817:Yuman
726:folds
714:karst
540:50â70
187:Width
11675:Life
11369:1916
11364:1915
11359:1914
11354:1913
11083:1920
11078:1918
11073:1917
11068:1916
11063:1915
11058:1914
10951:34th
10940:28th
10127:Utah
9991:Mesa
9923:Yuma
9878:Mesa
9805:Yuma
9785:Pima
9750:Gila
8690:2021
8653:ISBN
8628:ISBN
8567:2021
8508:2010
8475:2015
8442:2013
8412:2023
8362:2007
8285:2010
8241:2010
8195:2010
8147:2010
8108:2010
8064:2010
8025:2010
7961:2010
7901:2010
7829:2022
7770:2022
7736:2022
7698:PMID
7690:ISSN
7659:2022
7617:PMID
7609:ISSN
7564:2022
7484:2022
7423:2012
7397:2012
7365:2012
7333:2022
7298:2022
7274:PMID
7266:ISSN
7221:2022
7192:2011
7165:2012
7133:2012
7107:2012
7075:2011
7042:2022
7006:2022
6972:2022
6948:PMID
6940:ISSN
6895:2022
6861:2022
6831:2022
6796:2011
6767:2012
6735:2012
6703:2010
6677:2010
6651:2010
6625:2007
6560:2022
6530:2022
6484:2022
6454:2022
6436:ISBN
6400:2022
6370:2022
6349:ISBN
6325:2022
6307:ISBN
6286:2023
6252:PMID
6234:ISSN
6191:2022
6160:2022
6129:2016
6098:2022
6067:2022
6034:2022
5969:2022
5938:2022
5889:2022
5858:2017
5827:2022
5794:2022
5757:ISBN
5723:ISBN
5689:ISBN
5670:2022
5646:ISSN
5619:2022
5589:2022
5559:2022
5529:2022
5499:2022
5468:2022
5438:2022
5385:2010
5334:2022
5304:2022
5274:2022
5237:2022
5206:2022
5171:2022
5141:2022
5110:2020
5081:2022
5063:ISBN
5042:2022
5013:2022
4982:2022
4952:2022
4917:2022
4888:2022
4858:2022
4825:2022
4795:2022
4760:2022
4711:ISBN
4681:2020
4663:ISBN
4638:2014
4606:ISBN
4560:2007
4528:ISBN
4506:2010
4442:2020
4411:2022
4350:2022
4308:ISSN
4263:2022
4225:2022
4188:2010
4161:2022
4130:2022
4099:2012
4057:PMID
4049:ISSN
4004:2022
3973:2022
3957:ISSN
3912:2013
3878:2022
3859:PMID
3851:ISSN
3805:2022
3775:2008
3744:2022
3713:2022
3670:ISSN
3619:2013
3515:2021
3484:2022
3445:ISSN
3397:2010
3357:ISBN
3248:ISBN
3210:2022
3146:2022
3128:ISBN
3099:Link
3059:2016
3029:ISSN
2950:Hopi
2929:Mars
2723:and
2493:and
2491:blue
2330:and
2203:and
2114:and
2102:and
2019:and
1977:and
1809:and
1797:The
1766:moss
1636:VOCs
1584:NOAA
1439:The
1432:and
1254:HAER
1002:, a
968:and
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858:13th
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830:The
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418:and
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282:The
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9402:of
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8758:at
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7519:doi
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6932:doi
6274:CNN
6242:PMC
6226:doi
4583:1â7
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4039:doi
4027:338
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3330:doi
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3192:doi
3021:doi
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2703:TWA
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2308:elk
2306:An
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