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Pegmatite

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962: 994: 743: 942: 978: 70: 765:, consistent with their likely origin as the final melt fraction of a crystallizing body of magma. However, it is difficult to get a representative composition of a pegmatite, due to the large size of the constituent mineral crystals. Hence, pegmatite is often characterised by sampling the individual minerals that compose the pegmatite, and comparisons are made according to mineral chemistry. A common error is to assume that the wall zone is a chilled margin whose composition is representative of the original melt. 381:
subdivided based on composition into LCT and NYF families: LCT for Lithium, Cesium, and Tantalum enrichment and NYF for Niobium, Yttrium, and Fluorine enrichment. Most authors classify pegmatites according to LCT- and NYF-types and subtypes. Another important contribution of the classification is the petrogenetic component of the classification, which shows the association of LCT pegmatites with mainly orogenic plutons, and NYF pegmatites with mainly anorogenic plutons.
402: 595:. On the contrary, the largest crystals are often found on the margins of the pegmatite body. While aplites are sometimes found on the margins, they are as likely to occur within the body of the pegmatite. The crystals are never aligned in a way that would indicate flow, but are perpendicular to the walls. This implies formation in a static environment. Some pegmatities take the form of isolated pods, with no obvious feeder conduit. As a result, 31: 625: 394: 2146: 43: 804: 417:. Large crystals are favored. In normal igneous rocks, coarse texture is a result of slow cooling deep underground. It is not clear if pegmatite forms by slow or rapid cooling. In some studies, crystals in pegmatitic conditions have been recorded to grow at a rate ranging from 1 m to 10 m per day. Pegmatites are the last part of a magma body to crystallize. This final fluid fraction is enriched in 377:
relationship to metamorphism and granitic plutons. Cerny’s (1991) revision of that classification scheme is widely used, Cerny’s (1991) pegmatite classification, which is a combination of emplacement depth, metamorphic grade and minor element content, has provided significant insight into the origin of pegmatitic melts and their relative degrees of fractionation.
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and trace elements, and its very low viscosity allows components to migrate rapidly to join an existing crystal rather than coming together to form new crystals. This allows a few very large crystals to form. While most pegmatites have a simple composition of minerals common in ordinary igneous rock,
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Modern pegmatite classification schemes are strongly influenced by the depth-zone classification of granitic rocks published by Buddington (1959), and the Ginsburg & Rodionov (1960) and Ginsburg et al. (1979) classification which categorized pegmatites according to their depth of emplacement and
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A spectacular quartz and lath-spodumene zone. The spodumene occurs as blade-like crystals, sometimes of enormous size, mostly oriented at random but sometimes arranged to form a comb-like structure. Accessory minerals are beryl, apatite, microcline, and tantalum-niobium minerals, especially in the
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Granitic pegmatites are commonly ranked into three hierarchies (class – family – type – subtype) depending upon their mineralogical-geochemical characteristics and depth of emplacement according to Cerny (1991). Classes are Abyssal, Muscovite, Rare-Element and Miarolitic. The Rare-Element Class is
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The NYF pegmatites likely fractionated from A- to I-type granites that were relatively low in aluminium (subaluminous to metaluminous granites). These granites originated from depleted crust or mantle rock. LCT pegmatites most likely formed from S-type granites or possibly I-type granites, with a
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Lately, there have been a few attempts to create a new classification for pegmatites less dependent on mineralogy and more reflective of their geological setting. On this issue, one of the most notable efforts on this matter is Wise's (2022) pegmatite classification, which focuses mostly on the
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of hot alteration fluids upon a rock mass, with bulk chemical and textural change. Metasomatism is currently not favored as a mechanism for pegmatite formation and it is likely that metamorphism and magmatism are both contributors toward the conditions necessary for pegmatite genesis.
433:, and other elements. Such phase separation requires formation from a wet magma, rich enough in water to saturate before more than two-thirds of the magma is crystallized. Otherwise, the separation of the fluid phase is difficult to explain. Granite requires a water content of 4 909:(great masses of intrusive igneous rock). Most are closely related spatially and genetically to large intrusions. They may take the form of veins or dikes in the intrusion itself, but more commonly, they extend into the surrounding country rock, especially above the intrusion. 575:
may be found in the body of the pegmatite, but their original mineral content is replaced by quartz and alkali feldspar, so that they are difficult to distinguish from the surrounding pegmatite. Pegmatite also commonly replaces part of the surrounding country rock.
850:, a mineral from a zoned pegmatite. The majority of the world's beryllium is sourced from non-gem quality beryl within pegmatite. Tantalum, niobium, and rare-earth elements are sourced from a few pegmatites worldwide, such as the 587:. Although there is broad agreement on the basic mechanisms by which they form, the details of pegmatite formation remain enigmatic. Pegmatites have characteristics inconsistent with other igneous intrusions. They are not 559:
The core of the pegmatite, known as "spotted rock", which is relatively fine-grained spodumene, microcline, and quartz, with accompanying finer-grained albite, lithium-bearing muscovite, lepidolite,
1686: 684:, boron, phosphorus, and fluorine. These complex pegmatites contain unusual minerals of these elements, such as beryl, spodumene, lepidolite, amblygonite, topaz, apatite, fluorite, tourmaline, 571:
are commonly present. These may cut across the pegmatite, but also form zones or irregular patches around coarser material. The aplites are often layered, showing evidence of deformation.
357:. The largest beryl crystal ever found was from Malakialina on Madagascar, weighing about 380 tons, with a length of 18 m (59 ft) and a crosscut of 3.5 m (11 ft). 337:
with masses of thousands of tons. Quartz crystals with masses measured in thousands of pounds and micas over 10 meters (33 ft) across and 4 meters (13 ft) thick have been found.
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and may show zones with different mineral assemblages. Crystal size and mineral assemblages are usually oriented parallel to the wall rock or even concentric for pegmatite lenses.
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Most pegmatites have a simple composition, often being composed entirely of minerals common in granite, such as feldspar, mica, and quartz. The feldspar and quartz often show
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minerals, among others. Pegmatites have been mined for both quartz and feldspar. For quartz mining, pegmatites with central quartz masses have been of particular interest.
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Intermediate pegmatites (NYF + LCT pegmatites) are known and may have formed by contamination of an initially NYF magma body with melted undepleted supracrustral rock.
107:, with large interlocking crystals usually greater in size than 1 cm (0.4 in) and sometimes greater than 1 meter (3 ft). Most pegmatites are composed of 274:, with individual crystals usually over 1 centimeter (0.4 in) in size and sometimes exceeding 1 meter (3 ft). Most pegmatites have a composition similar to 464:) are concentrated in the hydrous phase, greatly lowering its viscosity. The silica in the hydrous phase is completely depolymerized, existing almost entirely as 2104: 515:, which may partially replace some of the minerals in the earlier zone. The center of the pegmatite may have cavities lined with spectacular gemstone crystals. 941: 2001:
Melcher, F.; Graupner, T.; OberthĂĽr, T.; SchĂĽtte, P. (1 March 2017). "Tantalum-(niobium-tin) mineralisation in pegmatites and rare-metal granites of Africa".
468:, with all oxygen bridges between silicon ions broken. The low viscosity promotes rapid diffusion through the fluid, allowing growth of large crystals. 1671: 333:
Individual crystals in pegmatites can be enormous in size. It is likely that the largest crystals ever found were feldspar crystals in pegmatites from
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Large crystals nucleate on the margins of pegmatites, becoming larger as they grow inward. These include very large conical alkali feldspar crystals.
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A continuous layer of very coarse quartz, albite, and muscovite. This zone also contains microcline, and has abundant accessory apatite, beryl, and
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bodies. Pegmatite body size is on the order of magnitude of one to a few hundred meters. Compared to typical igneous rocks they are rather
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a few pegmatites have a complex composition, with numerous unusual minerals of rare elements. These complex pegmatites are mined for
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for a pegmatite with a typical granitic composition, dominated by feldspar with lesser quartz and biotite. Under BGS terminology, a
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Because pegmatites likely crystallize from a fluid-dominated phase, rather than a melt phase, they straddle the boundary between
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Simmons, W. B.; Pezzotta, F.; Shigley, J. E.; Beurlen, H. (2012-08-01). "Granitic Pegmatites as Sources of Colored Gemstones".
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have no obvious connection to a larger intrusion. Pegmatites in low-grade metamorphic rock tend to be dominated by quartz and
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Pegmatites derived from batholiths can be divided into a family of NYF pegmatites, characterized by progressive enrichment in
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lower part of this zone. There is some pseudomorphic replacement of spodumene by rose muscovite and quartz by cleavelandite.
2418: 563:, and tantalite. Much of the spodumene and microcline have been extensively corroded and replaced by fine-grained micas. 890:-facies metamorphic belts. However, pegmatite localities are only well recorded when economic mineralisation is found. 2088: 1592: 1232: 611:, to liberate the right constituents and water, at the right temperature. A metasomatic pegmatite would be formed by 255: 1853:
Linnen, R. L.; Lichtervelde, M. Van; Cerny, P. (2012-08-01). "Granitic Pegmatites as Sources of Strategic Metals".
859: 330:) is a coarse-grained rock containing patches of much coarser-grained rock of essentially the same composition. 1654: 1324:
London, D.; Kontak, D. J. (3 September 2012). "Granitic Pegmatites: Scientific Wonders and Economic Bonanzas".
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origins have sometimes been suggested for pegmatites. A metamorphic pegmatite would be formed by removal of
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Wise, Michael A. (2022). "A proposed new mineralogical classification system for granitic pegmatites".
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Cerny, P.; Ercit, T. S. (1 December 2005). "The Classification of Granitic Pegmatites Revisited".
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crystals 8.2 meters (27 ft) long and 1.8 meters (6 ft) in diameter have been found at
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Ercit, T.S. (2005). "REE-enriched granitic pegmatites". In Linnen, R.L.; Samson, I.M. (eds.).
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description. Geologists typically prefix the term with a compositional description, so that
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Many of the world's largest crystals are found within pegmatites. These include crystals of
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A continuous layer of massive quartz. This zone is also rich in muscovite, microcline, and
445:), but only 1.5 wt% at 0.1 GPa (14,500 psi) for phase separation to take place. 165:
Most pegmatites are thought to form from the last fluid fraction of a large crystallizing
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Pegmatitic granite with pink potassium feldspar crystals, surrounding a finer-grained
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Pegmatopia: David London, School of Geology & Geophysics, University of Oklahoma
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London, D. (2008): Pegmatites. Canadian Mineralogist Special Publication 10, 347 pp.
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Some pegmatites have more complex zoning. Five distinct zones are recognized in the
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Scatter plots of lithium grade and tonnage for selected world deposits, as of 2017
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Linnen, Robert; Trueman, David L.; Burt, Richard (2014). "Tantalum and niobium".
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Gabbroic pegmatites typically consist of exceptionally coarse interlocking
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Rare-Element Geochemistry and Mineral Deposits (GAC Short Course Notes 17)
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Phelps, Patrick R.; Lee, Cin-Ty A.; Morton, Douglas M. (5 October 2020).
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Gabbroic pegmatites typically occur as lenses within bodies of gabbro or
887: 731: 697: 600: 596: 588: 500: 342: 73: 59: 1227:(2nd ed.). Cambridge, UK: Cambridge University Press. p. 255. 1115:(Fourth ed.). Alexandria, Virginia: American Geological Institute. 776:, and fluorine as well as enrichment in beryllium, rare earth elements, 3381: 3366: 3341: 3336: 3246: 3231: 3148: 3116: 3081: 3071: 3053: 3033: 2978: 2958: 2913: 2835: 2820: 2796: 2756: 2729: 2709: 2684: 2644: 2619: 2609: 2604: 2584: 2493: 2313: 1057:
London, David; Morgan, George B. (2012-08-01). "The Pegmatite Puzzle".
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is a pegmatite with the composition of nepheline syenite. However, the
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Partington, G. A.; McNaughton, N. J.; Williams, I. S. (1995-05-01).
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Notable pegmatite occurrences are found worldwide within the major
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Pegmatites form under conditions in which the rate of new crystal
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crystals over 12 meters (40 ft) long have been found in the
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Pegmatite bodies are usually of minor size compared to typical
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into a melt phase and a hydrous fluid phase saturated with
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London, David (2016). "Rare-Element Granitic Pegmatites".
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Nepheline syenite pegmatites typically contain zirconium,
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source of the magma from which the pegmatite crystalizes.
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When this hydrous fluid is injected into the surrounding
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Petrology : igneous, sedimentary, and metamorphic
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New Mexico Geological Society Field Conference Series
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Simmons, Wm. B. Skip; Webber, Karen L. (2008-08-29).
1361:"The Classification of Granitic Pegmatites Revisited" 1261:
British Geological Survey: Rock Classification Scheme
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is a pegmatite with the composition of granite while
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Jakubke, Hans-Dieter; Jeschkeit, Hans, eds. (1994).
1721:. Geological Association of Canada. pp. 175–199 1587:(Fourth ed.). Oxford: Oxford University Press. 1213: 1149:(2nd ed.). New York: W.H. Freeman. p. 73. 788:, beryllium, tin, barium, phosphorus, and fluorine. 318:(BGS) discourages this usage, preferring terms like 258:
first used the term in its present meaning in 1845.
1323: 1195:Klein, Cornelis; Hurlbut, Cornelius S. Jr. (1993). 1190: 1188: 1186: 842:or usually from lepidolite. The primary source for 405:
Blue apatite crystals at the Harding pegmatite mine
1184: 1182: 1180: 1178: 1176: 1174: 1172: 1170: 1168: 1166: 792:higher aluminium content (peraluminous granites). 534:A white border rind of fine-grained quartz-albite 2109:, 2019, Field Trip Guide, at semanticscholar.org. 2035: 1740: 1738: 1736: 1649:. Princeton, N.J.: Van Nostrand. pp. 90–91. 1197:Manual of mineralogy : (after James D. Dana) 545:. Beryl is occasionally very coarse and abundant. 421:and trace elements. The residual magma undergoes 27:Igneous rock with very large interlocked crystals 3414: 2073:Rare Earth and Critical Elements in Ore Deposits 1938: 1140: 1138: 1136: 1134: 1132: 169:body. This residual fluid is highly enriched in 1525:"Episodes of fast crystal growth in pegmatites" 1522: 1225:Principles of igneous and metamorphic petrology 1199:(21st ed.). New York: Wiley. p. 568. 1163: 648:. Rarely, pegmatites are extremely enriched in 1733: 1280: 1278: 1276: 1274: 1254:"Rock Classification Scheme - Vol 1 - Igneous" 712:, are found almost exclusively in pegmatites. 397:Rose muscovite from the Harding pegmatite mine 2412: 2172: 1702: 1632: 1607: 1578: 1576: 1510: 1498: 1413: 1222: 1129: 1106: 1104: 1102: 1100: 1098: 1096: 931:. Nepheline syenite pegmatites are common in 1895: 1670:Jahns, Richard H.; Ewing, Rodney C. (1976). 1223:Philpotts, Anthony R.; Ague, Jay J. (2009). 1194: 1111:Jackson, Julia A., ed. (1997). "pegmatite". 1056: 1052: 1050: 1048: 1022: 819:, tourmaline, topaz, fluorite, apatite, and 607:from metamorphic rocks, particularly felsic 266:Pegmatites are exceptionally coarse-grained 2127:Major Pegmatite Deposits of New York State, 1317: 1311:"The largest crystals by Peter C. Rickwood" 1271: 811:Pegmatites often contain rare elements and 2419: 2405: 2179: 2165: 1833: 1744: 1669: 1585:A dictionary of geology and earth sciences 1573: 1358: 1144: 1093: 985:Black Canyon of the Gunnison National Park 1932: 1708: 1672:"The Harding Mine Taos County New Mexico" 1644: 1556: 1045: 784:, and tantalum, as well as enrichment in 278:, so that their most common minerals are 1284: 1145:Blatt, Harvey; Tracy, Robert J. (1996). 1028: 905:, and are most common at the margins of 802: 761:Pegmatites are enriched in volatile and 741: 623: 400: 392: 68: 41: 29: 1829: 1827: 1110: 76:pegmatite swarm in the headwall of the 14: 3415: 2129:New York State Museum Bulletin No. 408 2070: 1663: 1582: 1359:Cerny, P.; Ercit, T. S. (2005-12-01). 798: 261: 2400: 2160: 2106:Folds and Shear Zones at Cap de Creus 1889: 1714: 1583:Allaby, Michael (2013). "pegmatite". 1416:"Pegmatite genesis: state of the art" 1248: 1246: 1244: 983:Potassium feldspar pegmatites at the 834:Pegmatites are the primary source of 1824: 1460: 487:. This is followed by deposition of 58:from the White Elephant Mine in the 24: 2426: 2116: 2103:Elena Druguet and Jordi Carreras, 1947: 1241: 947:Pegmatite (light colored) in dark 893:Pegmatites are found as irregular 210:, and other valuable commodities. 25: 3434: 2138: 700:. Some of these can be important 371: 320:biotite-quartz-feldspar pegmatite 256:Wilhelm Karl Ritter von Haidinger 2144: 2003:South African Journal of Geology 1692:from the original on 2022-10-09. 1440:10.1127/0935-1221/2008/0020-1833 1031:"The Black Hills Mineral Region" 992: 976: 960: 940: 870:, and the Mibra (Volta) mine of 860:Democratic Republic of the Congo 448:The volatiles (primarily water, 413:is much slower than the rate of 2097: 2064: 2052:from the original on 2022-10-09 2029: 1994: 1921:from the original on 2022-10-09 1846: 1781: 1638: 1516: 1454: 1407: 1352: 1285:McBirney, Alexander R. (1984). 737: 1941:Concise Encyclopedia Chemistry 1420:European Journal of Mineralogy 1303: 912:Some pegmatites surrounded by 13: 1: 1015: 1002:pegmatite dike intruded into 877: 866:the Alto Ligonha Province of 757:-enriched pegmatite in Brazil 749:tourmaline (olive-green) and 636:, Rock Creek Canyon, eastern 619: 581:hydrothermal mineral deposits 246:. The term was first used by 388: 213: 7: 1834:LundegĂĄrdh, Per H. (1971). 1010:peninsula, Catalonia, Spain 312:nepheline syenite pegmatite 10: 3439: 1980:10.2113/gsecongeo.90.3.616 1875:10.2113/gselements.8.4.275 1810:10.2113/gselements.8.4.281 1767:10.2113/gscanmin.43.6.2005 1549:10.1038/s41467-020-18806-w 1385:10.2113/gscanmin.43.6.2005 1346:10.2113/gselements.8.4.257 1079:10.2113/gselements.8.4.263 437:at a pressure of 0.5  3224: 3062: 2849: 2432: 2200: 1899:; Simpson, F. M. (1978). 1838:(in Swedish). Stockholm: 1747:The Canadian Mineralogist 1703:Philpotts & Ague 2009 1633:Philpotts & Ague 2009 1608:Philpotts & Ague 2009 1511:Philpotts & Ague 2009 1499:Philpotts & Ague 2009 1463:The Canadian Mineralogist 1365:The Canadian Mineralogist 316:British Geological Survey 270:composed of interlocking 250:in 1822 as a synonym for 2039:Critical metals handbook 2023:10.25131/gssajg.120.1.77 1645:Sinkankas, John (1964). 1313:. American Mineralogist. 613:hydrothermal circulation 129:intermediate composition 2484:Basaltic trachyandesite 2452:Alkali feldspar granite 1647:Mineralogy for amateurs 862:, the Kenticha mine of 479:and quartz, with minor 1840:Almqvist & Wiksell 1483:10.3749/canmin.1800006 808: 758: 753:mica (violet), from a 641: 406: 398: 135:pegmatites are known. 103:showing a very coarse 92: 66: 39: 2869:Banded iron formation 1908:Canadian Mineralogist 1529:Nature Communications 1035:American Mineralogist 1029:Schwartz, G. (1928). 854:, the Kibara Belt of 852:Greenbushes Pegmatite 838:either as spodumene, 806: 763:incompatible elements 745: 650:incompatible elements 627: 404: 396: 72: 46:Pegmatite containing 45: 33: 2153:at Wikimedia Commons 2125:Tan, Li-ping, 1966, 2045:. pp. 361–384. 499:, beryl, spodumene, 34:Pegmatite with blue 2015:2017SAJG..120...77M 1972:1995EcGeo..90..616P 1867:2012Eleme...8..275L 1836:Nyttosten i Sverige 1802:2012Eleme...8..281S 1759:2005CaMin..43.2005C 1705:, pp. 255–256. 1541:2020NatCo..11.4986P 1475:2022CaMin..60..229W 1432:2008EJMin..20..421S 1377:2005CaMin..43.2005C 1338:2012Eleme...8..257L 1113:Glossary of geology 1071:2012Eleme...8..263L 935:igneous complexes. 823:, often along with 815:. Examples include 799:Economic importance 262:General description 204:rare earth elements 119:, having a similar 3225:Specific varieties 2327:Diabase (Dolerite) 967:Pegmatite (pink), 953:ĂŽle de Noirmoutier 918:carbonate minerals 827:, rare earth, and 809: 759: 721:rare earth element 642: 585:igneous intrusions 407: 399: 308:granitic pegmatite 93: 67: 40: 3410: 3409: 2660:Nepheline syenite 2394: 2393: 2389: 2388: 2361:Microgranodiorite 2291:Subvolcanic rocks 2149:Media related to 2081:10.5382/Rev.18.08 1842:. pp. 16–17. 1287:Igneous petrology 530:, US. These are: 524:Picuris Mountains 520:Harding Pegmatite 328:pegmatitic gabbro 302:is thus purely a 292:nepheline syenite 127:. However, rarer 16:(Redirected from 3430: 3352:Rapakivi granite 3064:Metamorphic rock 2851:Sedimentary rock 2720:Quartz monzonite 2421: 2414: 2407: 2398: 2397: 2203: 2202: 2181: 2174: 2167: 2158: 2157: 2148: 2110: 2101: 2095: 2094: 2068: 2062: 2061: 2059: 2057: 2051: 2044: 2033: 2027: 2026: 1998: 1992: 1991: 1960:Economic Geology 1951: 1945: 1944: 1936: 1930: 1929: 1927: 1926: 1920: 1905: 1893: 1887: 1886: 1850: 1844: 1843: 1831: 1822: 1821: 1785: 1779: 1778: 1753:(6): 2005–2026. 1742: 1731: 1730: 1728: 1726: 1712: 1706: 1700: 1694: 1693: 1691: 1676: 1667: 1661: 1660: 1642: 1636: 1630: 1611: 1605: 1599: 1598: 1580: 1571: 1570: 1560: 1520: 1514: 1508: 1502: 1496: 1487: 1486: 1458: 1452: 1451: 1411: 1405: 1404: 1371:(6): 2005–2026. 1356: 1350: 1349: 1321: 1315: 1314: 1307: 1301: 1300: 1282: 1269: 1268: 1258: 1250: 1239: 1238: 1220: 1211: 1210: 1192: 1161: 1160: 1142: 1127: 1126: 1108: 1091: 1090: 1054: 1043: 1042: 1026: 996: 980: 964: 944: 914:metamorphic rock 423:phase separation 326:(for example, a 82:mountain glacier 21: 3438: 3437: 3433: 3432: 3431: 3429: 3428: 3427: 3413: 3412: 3411: 3406: 3220: 3164:Pseudotachylite 3058: 2845: 2777:Tephriphonolite 2428: 2425: 2395: 2390: 2385: 2380: 2376: 2368: 2363: 2359: 2351: 2346: 2342: 2334: 2329: 2325: 2317: 2312: 2311: 2303: 2295: 2288: 2274: 2268: 2261: 2255: 2244: 2238: 2231: 2225: 2218: 2212: 2196: 2193:silicon dioxide 2185: 2141: 2119: 2117:Further reading 2114: 2113: 2102: 2098: 2091: 2069: 2065: 2055: 2053: 2049: 2042: 2034: 2030: 1999: 1995: 1952: 1948: 1937: 1933: 1924: 1922: 1918: 1903: 1894: 1890: 1851: 1847: 1832: 1825: 1786: 1782: 1743: 1734: 1724: 1722: 1713: 1709: 1701: 1697: 1689: 1674: 1668: 1664: 1657: 1643: 1639: 1631: 1614: 1606: 1602: 1595: 1581: 1574: 1521: 1517: 1509: 1505: 1497: 1490: 1459: 1455: 1412: 1408: 1357: 1353: 1322: 1318: 1309: 1308: 1304: 1297: 1283: 1272: 1256: 1252: 1251: 1242: 1235: 1221: 1214: 1207: 1193: 1164: 1157: 1143: 1130: 1123: 1109: 1094: 1055: 1046: 1027: 1023: 1018: 1011: 997: 988: 981: 972: 965: 956: 945: 922:alkali feldspar 880: 801: 740: 704:minerals. Some 646:graphic texture 622: 391: 374: 324:pegmatitic rock 264: 252:graphic granite 244:graphic granite 216: 123:composition to 84:, northeastern 28: 23: 22: 15: 12: 11: 5: 3436: 3426: 3425: 3408: 3407: 3405: 3404: 3399: 3394: 3389: 3384: 3379: 3374: 3369: 3364: 3359: 3357:Rhomb porphyry 3354: 3349: 3344: 3339: 3334: 3329: 3324: 3319: 3314: 3309: 3304: 3299: 3294: 3289: 3284: 3279: 3274: 3269: 3264: 3259: 3254: 3249: 3244: 3239: 3234: 3228: 3226: 3222: 3221: 3219: 3218: 3213: 3208: 3207: 3206: 3199:Talc carbonate 3196: 3191: 3186: 3181: 3176: 3171: 3166: 3161: 3156: 3151: 3146: 3141: 3136: 3131: 3126: 3121: 3120: 3119: 3109: 3104: 3099: 3094: 3089: 3084: 3079: 3074: 3068: 3066: 3060: 3059: 3057: 3056: 3051: 3046: 3041: 3036: 3031: 3026: 3021: 3016: 3011: 3006: 3001: 2996: 2991: 2986: 2981: 2976: 2971: 2966: 2961: 2956: 2951: 2946: 2941: 2936: 2931: 2926: 2921: 2916: 2911: 2906: 2901: 2896: 2891: 2886: 2881: 2876: 2871: 2866: 2861: 2855: 2853: 2847: 2846: 2844: 2843: 2838: 2833: 2828: 2823: 2818: 2813: 2812: 2811: 2801: 2800: 2799: 2792:Trachyandesite 2789: 2784: 2779: 2774: 2769: 2764: 2759: 2754: 2749: 2748: 2747: 2742: 2732: 2727: 2722: 2717: 2715:Quartz diorite 2712: 2707: 2702: 2697: 2692: 2687: 2682: 2677: 2672: 2667: 2662: 2657: 2652: 2647: 2642: 2637: 2632: 2627: 2622: 2617: 2612: 2607: 2602: 2597: 2592: 2587: 2582: 2577: 2572: 2567: 2562: 2557: 2552: 2551: 2550: 2540: 2535: 2530: 2529: 2528: 2518: 2513: 2508: 2503: 2498: 2497: 2496: 2491: 2481: 2480: 2479: 2477:Picrite basalt 2474: 2464: 2459: 2454: 2449: 2444: 2438: 2436: 2430: 2429: 2427:Types of rocks 2424: 2423: 2416: 2409: 2401: 2392: 2391: 2387: 2386: 2371: 2369: 2354: 2352: 2337: 2335: 2320: 2318: 2309:Picrite basalt 2306: 2304: 2298:Plutonic rocks 2284:Volcanic rocks 2280: 2277: 2276: 2272: 2263: 2259: 2246: 2242: 2233: 2229: 2220: 2216: 2207: 2201: 2198: 2197: 2191:classified by 2184: 2183: 2176: 2169: 2161: 2155: 2154: 2140: 2139:External links 2137: 2136: 2135: 2130: 2123: 2118: 2115: 2112: 2111: 2096: 2089: 2063: 2028: 1993: 1966:(3): 616–635. 1946: 1931: 1888: 1861:(4): 275–280. 1845: 1823: 1796:(4): 281–287. 1780: 1732: 1707: 1695: 1662: 1655: 1637: 1635:, p. 255. 1612: 1610:, p. 256. 1600: 1593: 1572: 1515: 1513:, p. 257. 1503: 1501:, p. 259. 1488: 1469:(2): 229–248. 1453: 1426:(4): 421–438. 1406: 1351: 1332:(4): 257–261. 1316: 1302: 1295: 1270: 1267:: 20–21. 1999. 1240: 1233: 1212: 1205: 1162: 1155: 1128: 1121: 1092: 1044: 1020: 1019: 1017: 1014: 1013: 1012: 998: 991: 989: 982: 975: 973: 966: 959: 957: 946: 939: 879: 876: 840:lithiophyllite 800: 797: 739: 736: 621: 618: 593:chilled margin 591:, and show no 565: 564: 557: 553: 546: 539: 415:crystal growth 390: 387: 373: 372:Classification 370: 362:intrusive rock 263: 260: 248:RenĂ© Just HaĂĽy 215: 212: 26: 9: 6: 4: 3: 2: 3435: 3424: 3421: 3420: 3418: 3403: 3400: 3398: 3395: 3393: 3390: 3388: 3385: 3383: 3380: 3378: 3375: 3373: 3370: 3368: 3365: 3363: 3360: 3358: 3355: 3353: 3350: 3348: 3345: 3343: 3340: 3338: 3335: 3333: 3330: 3328: 3325: 3323: 3320: 3318: 3317:Litchfieldite 3315: 3313: 3310: 3308: 3305: 3303: 3300: 3298: 3295: 3293: 3290: 3288: 3285: 3283: 3282:Hyaloclastite 3280: 3278: 3275: 3273: 3270: 3268: 3265: 3263: 3260: 3258: 3255: 3253: 3250: 3248: 3245: 3243: 3240: 3238: 3235: 3233: 3230: 3229: 3227: 3223: 3217: 3214: 3212: 3209: 3205: 3202: 3201: 3200: 3197: 3195: 3192: 3190: 3187: 3185: 3182: 3180: 3177: 3175: 3172: 3170: 3167: 3165: 3162: 3160: 3157: 3155: 3152: 3150: 3147: 3145: 3142: 3140: 3137: 3135: 3132: 3130: 3129:Litchfieldite 3127: 3125: 3122: 3118: 3115: 3114: 3113: 3110: 3108: 3105: 3103: 3100: 3098: 3095: 3093: 3090: 3088: 3085: 3083: 3080: 3078: 3075: 3073: 3070: 3069: 3067: 3065: 3061: 3055: 3052: 3050: 3047: 3045: 3042: 3040: 3037: 3035: 3032: 3030: 3027: 3025: 3022: 3020: 3017: 3015: 3012: 3010: 3007: 3005: 3002: 3000: 2997: 2995: 2992: 2990: 2987: 2985: 2982: 2980: 2977: 2975: 2972: 2970: 2967: 2965: 2962: 2960: 2957: 2955: 2952: 2950: 2947: 2945: 2942: 2940: 2937: 2935: 2932: 2930: 2927: 2925: 2922: 2920: 2917: 2915: 2912: 2910: 2907: 2905: 2902: 2900: 2897: 2895: 2892: 2890: 2887: 2885: 2882: 2880: 2877: 2875: 2872: 2870: 2867: 2865: 2862: 2860: 2857: 2856: 2854: 2852: 2848: 2842: 2839: 2837: 2834: 2832: 2829: 2827: 2824: 2822: 2819: 2817: 2814: 2810: 2807: 2806: 2805: 2802: 2798: 2795: 2794: 2793: 2790: 2788: 2785: 2783: 2780: 2778: 2775: 2773: 2770: 2768: 2765: 2763: 2760: 2758: 2755: 2753: 2750: 2746: 2743: 2741: 2738: 2737: 2736: 2733: 2731: 2728: 2726: 2723: 2721: 2718: 2716: 2713: 2711: 2708: 2706: 2703: 2701: 2698: 2696: 2695:Phonotephrite 2693: 2691: 2688: 2686: 2683: 2681: 2678: 2676: 2673: 2671: 2668: 2666: 2663: 2661: 2658: 2656: 2653: 2651: 2648: 2646: 2643: 2641: 2638: 2636: 2633: 2631: 2628: 2626: 2623: 2621: 2618: 2616: 2613: 2611: 2608: 2606: 2603: 2601: 2600:Hyaloclastite 2598: 2596: 2593: 2591: 2588: 2586: 2583: 2581: 2578: 2576: 2573: 2571: 2568: 2566: 2563: 2561: 2558: 2556: 2553: 2549: 2546: 2545: 2544: 2541: 2539: 2536: 2534: 2531: 2527: 2524: 2523: 2522: 2519: 2517: 2514: 2512: 2509: 2507: 2504: 2502: 2499: 2495: 2492: 2490: 2487: 2486: 2485: 2482: 2478: 2475: 2473: 2472:Alkali basalt 2470: 2469: 2468: 2465: 2463: 2460: 2458: 2455: 2453: 2450: 2448: 2445: 2443: 2440: 2439: 2437: 2435: 2431: 2422: 2417: 2415: 2410: 2408: 2403: 2402: 2399: 2384: 2383: 2379: 2375: 2370: 2367: 2366: 2362: 2358: 2353: 2350: 2349: 2345: 2341: 2336: 2333: 2332: 2328: 2324: 2319: 2316: 2315: 2310: 2305: 2302: 2301: 2299: 2294: 2292: 2287: 2285: 2279: 2278: 2275: 2267: 2264: 2262: 2254: 2250: 2247: 2245: 2237: 2234: 2232: 2224: 2221: 2219: 2211: 2208: 2205: 2204: 2199: 2194: 2190: 2189:igneous rocks 2182: 2177: 2175: 2170: 2168: 2163: 2162: 2159: 2152: 2147: 2143: 2142: 2134: 2131: 2128: 2124: 2121: 2120: 2108: 2107: 2100: 2092: 2090:9781629490922 2086: 2082: 2078: 2074: 2067: 2048: 2041: 2040: 2032: 2024: 2020: 2016: 2012: 2009:(1): 77–100. 2008: 2004: 1997: 1989: 1985: 1981: 1977: 1973: 1969: 1965: 1961: 1957: 1950: 1942: 1935: 1917: 1913: 1909: 1902: 1898: 1892: 1884: 1880: 1876: 1872: 1868: 1864: 1860: 1856: 1849: 1841: 1837: 1830: 1828: 1819: 1815: 1811: 1807: 1803: 1799: 1795: 1791: 1784: 1776: 1772: 1768: 1764: 1760: 1756: 1752: 1748: 1741: 1739: 1737: 1720: 1719: 1711: 1704: 1699: 1688: 1684: 1680: 1673: 1666: 1658: 1652: 1648: 1641: 1634: 1629: 1627: 1625: 1623: 1621: 1619: 1617: 1609: 1604: 1596: 1594:9780199653065 1590: 1586: 1579: 1577: 1568: 1564: 1559: 1554: 1550: 1546: 1542: 1538: 1534: 1530: 1526: 1519: 1512: 1507: 1500: 1495: 1493: 1484: 1480: 1476: 1472: 1468: 1464: 1457: 1449: 1445: 1441: 1437: 1433: 1429: 1425: 1421: 1417: 1410: 1402: 1398: 1394: 1390: 1386: 1382: 1378: 1374: 1370: 1366: 1362: 1355: 1347: 1343: 1339: 1335: 1331: 1327: 1320: 1312: 1306: 1298: 1292: 1288: 1281: 1279: 1277: 1275: 1266: 1262: 1255: 1249: 1247: 1245: 1236: 1234:9780521880060 1230: 1226: 1219: 1217: 1208: 1202: 1198: 1191: 1189: 1187: 1185: 1183: 1181: 1179: 1177: 1175: 1173: 1171: 1169: 1167: 1158: 1152: 1148: 1141: 1139: 1137: 1135: 1133: 1124: 1118: 1114: 1107: 1105: 1103: 1101: 1099: 1097: 1088: 1084: 1080: 1076: 1072: 1068: 1065:(4): 263–68. 1064: 1060: 1053: 1051: 1049: 1040: 1036: 1032: 1025: 1021: 1009: 1005: 1001: 995: 990: 986: 979: 974: 970: 963: 958: 954: 950: 943: 938: 937: 936: 934: 930: 925: 923: 919: 915: 910: 908: 904: 900: 896: 891: 889: 886:, and within 885: 875: 873: 869: 865: 861: 857: 853: 849: 845: 841: 837: 832: 830: 826: 822: 818: 814: 805: 796: 793: 789: 787: 783: 779: 775: 771: 766: 764: 756: 752: 748: 744: 735: 733: 729: 724: 722: 718: 713: 711: 707: 703: 699: 695: 691: 687: 683: 679: 675: 671: 667: 663: 659: 655: 651: 647: 639: 638:Sierra Nevada 635: 631: 626: 617: 614: 610: 606: 602: 598: 594: 590: 586: 582: 577: 574: 570: 562: 558: 554: 551: 550:cleavelandite 547: 544: 540: 537: 533: 532: 531: 529: 525: 521: 516: 514: 510: 506: 502: 498: 494: 490: 486: 482: 478: 474: 469: 467: 466:orthosilicate 463: 459: 455: 451: 446: 444: 441:(72,500  440: 436: 432: 428: 424: 420: 416: 412: 403: 395: 386: 382: 378: 369: 367: 366:inhomogeneous 363: 358: 356: 355:Albany, Maine 352: 348: 344: 340: 336: 331: 329: 325: 321: 317: 313: 309: 305: 301: 297: 293: 289: 285: 281: 277: 273: 269: 268:igneous rocks 259: 257: 253: 249: 245: 241: 237: 233: 229: 225: 224:Homeric Greek 222:derives from 221: 211: 209: 205: 201: 197: 193: 189: 185: 181: 177: 172: 168: 163: 161: 157: 153: 149: 145: 141: 136: 134: 130: 126: 122: 118: 114: 110: 106: 102: 98: 91: 87: 86:Baffin Island 83: 79: 75: 71: 65: 61: 57: 53: 49: 44: 37: 32: 19: 3327:Luxullianite 3307:Lapis lazuli 3252:Blue Granite 3179:Serpentinite 3154:Metapsammite 2904:Conglomerate 2826:Trondhjemite 2804:Trachybasalt 2745:Pantellerite 2679: 2650:Monzogranite 2595:Hornblendite 2580:Granodiorite 2434:Igneous rock 2378:Microgranite 2372: 2365:Granodiorite 2355: 2344:Microdiorite 2338: 2321: 2307: 2296: 2289: 2282: 2281: 2249:Intermediate 2236:Intermediate 2126: 2105: 2099: 2072: 2066: 2054:. Retrieved 2038: 2031: 2006: 2002: 1996: 1963: 1959: 1949: 1940: 1934: 1923:. Retrieved 1911: 1907: 1891: 1858: 1854: 1848: 1835: 1793: 1789: 1783: 1750: 1746: 1723:. Retrieved 1717: 1710: 1698: 1682: 1678: 1665: 1646: 1640: 1603: 1584: 1532: 1528: 1518: 1506: 1466: 1462: 1456: 1423: 1419: 1409: 1368: 1364: 1354: 1329: 1325: 1319: 1305: 1286: 1264: 1260: 1224: 1196: 1146: 1112: 1062: 1058: 1038: 1034: 1024: 1008:Cap de Creus 969:Isle of Skye 926: 911: 892: 881: 872:Minas Gerais 833: 810: 794: 790: 767: 760: 738:Geochemistry 725: 714: 643: 640:, California 578: 566: 526:of northern 517: 473:country rock 470: 447: 408: 383: 379: 375: 359: 347:South Dakota 332: 327: 323: 319: 311: 307: 299: 265: 227: 219: 217: 164: 137: 101:igneous rock 96: 94: 64:South Dakota 3216:Whiteschist 3107:Greenschist 3087:Cataclasite 3077:Amphibolite 3004:Phosphorite 2954:Itacolumite 2879:Calcarenite 2725:Quartzolite 2665:Nephelinite 2635:Lamprophyre 2590:Harzburgite 2548:Napoleonite 2521:Charnockite 2516:Carbonatite 2506:Blairmorite 2457:Anorthosite 1914:: 325–333. 1897:ÄŚernĂ˝, Petr 1725:23 December 1535:(1): 4986. 949:mica schist 888:greenschist 732:plagioclase 698:molybdenite 601:metasomatic 597:metamorphic 589:porphyritic 501:amblygonite 343:Black Hills 298:. The term 226:, πήγνυμι ( 80:of a small 74:Proterozoic 60:Black Hills 3382:Teschenite 3367:Shonkinite 3342:Pietersite 3337:Novaculite 3247:Borolanite 3232:Adamellite 3149:Metapelite 3117:Calcflinta 3082:Blueschist 3072:Anthracite 3054:Wackestone 3034:Travertine 2979:Lumachelle 2959:Jaspillite 2914:Diamictite 2836:Websterite 2821:Troctolite 2797:Benmoreite 2757:Shonkinite 2730:Rhyodacite 2710:Pyroxenite 2685:Peridotite 2645:Lherzolite 2620:Kimberlite 2610:Ignimbrite 2605:Icelandite 2585:Granophyre 2494:Shoshonite 2314:Peridotite 2210:Ultramafic 1925:2010-09-26 1656:0442276249 1296:0198578105 1206:047157452X 1156:0716724383 1122:0922152349 1016:References 987:, Colorado 971:, Scotland 907:batholiths 878:Occurrence 874:, Brazil. 868:Mozambique 817:aquamarine 751:lepidolite 723:minerals. 708:, such as 686:triphylite 652:, such as 620:Mineralogy 538:pegmatite. 528:New Mexico 497:tourmaline 493:lepidolite 477:microcline 462:phosphates 411:nucleation 160:tourmaline 140:microcline 52:tourmaline 48:lepidolite 18:Pegmatites 3423:Pegmatite 3397:Variolite 3387:Theralite 3377:Tachylite 3362:Rodingite 3332:Mangerite 3312:Larvikite 3297:Jasperoid 3292:Jadeitite 3257:Epidosite 3211:Tectonite 3204:Soapstone 3169:Quartzite 3139:Migmatite 3124:Itabirite 3102:Granulite 3044:Turbidite 3024:Sylvinite 3019:Siltstone 3009:Sandstone 2994:Oil shale 2974:Limestone 2949:Gritstone 2944:Greywacke 2939:Geyserite 2929:Evaporite 2919:Diatomite 2894:Claystone 2859:Argillite 2772:Tachylyte 2740:Comendite 2690:Phonolite 2680:Pegmatite 2655:Monzonite 2630:Lamproite 2625:Komatiite 2565:Foidolite 2526:Enderbite 2489:Mugearite 2151:Pegmatite 1988:1554-0774 1883:1811-5209 1818:1811-5209 1775:129967533 1448:0935-1221 1401:129967533 1393:0008-4476 1087:1811-5209 1004:Ediacaran 1000:Hercynian 848:pollucite 813:gemstones 706:gemstones 690:columbite 674:zirconium 662:beryllium 605:volatiles 573:Xenoliths 561:microlite 543:tantalite 536:muscovite 458:chlorides 454:fluorides 389:Petrology 339:Spodumene 300:pegmatite 242:known as 220:pegmatite 218:The word 214:Etymology 180:beryllium 171:volatiles 152:spodumene 97:pegmatite 3417:Category 3372:Taconite 3347:Pyrolite 3272:Ganister 3242:Aphanite 3237:Appinite 3159:Phyllite 3144:Mylonite 3112:Hornfels 3092:Eclogite 2989:Mudstone 2964:Laterite 2924:Dolomite 2841:Wehrlite 2816:Trachyte 2809:Hawaiite 2787:Tonalite 2782:Tephrite 2735:Rhyolite 2700:Porphyry 2675:Obsidian 2560:Essexite 2511:Boninite 2501:Basanite 2447:Andesite 2374:Rhyolite 2340:Andesite 2269:>69% 2213:<45% 2047:Archived 1916:Archived 1855:Elements 1790:Elements 1687:Archived 1567:33020499 1326:Elements 1059:Elements 1041:: 56–63. 1006:schist, 955:, France 933:alkaline 864:Ethiopia 829:tungsten 821:corundum 786:rubidium 778:scandium 728:pyroxene 717:titanium 694:monazite 632:-filled 630:cumulate 513:fluorite 419:volatile 304:textural 284:feldspar 272:crystals 236:feldspar 196:tantalum 188:fluorine 113:feldspar 38:crystals 36:corundum 3392:Unakite 3322:Llanite 3287:Ijolite 3262:Felsite 3194:Suevite 3029:Tillite 2969:Lignite 2909:Coquina 2874:Breccia 2767:Syenite 2615:Ijolite 2575:Granite 2543:Diorite 2538:Diabase 2442:Adakite 2382:Granite 2348:Diorite 2256:63–69% 2239:52–63% 2226:45–52% 2195:content 2187:Common 2056:29 July 2011:Bibcode 1968:Bibcode 1863:Bibcode 1798:Bibcode 1755:Bibcode 1685:: 263. 1558:7536386 1537:Bibcode 1471:Bibcode 1428:Bibcode 1373:Bibcode 1334:Bibcode 1067:Bibcode 929:diabase 884:cratons 844:caesium 836:lithium 782:caesium 774:yttrium 770:niobium 755:lithium 747:Elbaite 710:emerald 682:thorium 678:uranium 670:niobium 658:caesium 654:lithium 634:enclave 569:Aplites 522:in the 509:apatite 450:borates 431:alkalis 335:Karelia 276:granite 240:texture 238:in the 228:pÄ“gnymi 208:uranium 200:niobium 176:lithium 125:granite 121:silicic 105:texture 90:Nunavut 3302:Kenyte 3277:Gossan 3174:Schist 3134:Marble 3097:Gneiss 2999:Oolite 2864:Arkose 2762:Sovite 2752:Scoria 2705:Pumice 2670:Norite 2640:Latite 2570:Gabbro 2555:Dunite 2533:Dacite 2467:Basalt 2462:Aplite 2357:Dacite 2331:Gabbro 2323:Basalt 2266:Felsic 2253:felsic 2087:  1986:  1881:  1816:  1773:  1653:  1591:  1565:  1555:  1446:  1399:  1391:  1293:  1231:  1203:  1153:  1119:  1085:  856:Rwanda 719:, and 696:, and 609:gneiss 511:, and 495:, gem 489:albite 485:garnet 481:schorl 460:, and 427:silica 349:, and 296:gabbro 286:, and 280:quartz 232:quartz 158:, and 144:quartz 115:, and 109:quartz 99:is an 78:cirque 56:quartz 54:, and 3267:Flint 3189:Slate 3184:Skarn 3049:Varve 3014:Shale 2934:Flint 2889:Chert 2884:Chalk 2223:Mafic 2050:(PDF) 2043:(PDF) 1919:(PDF) 1904:(PDF) 1771:S2CID 1690:(PDF) 1675:(PDF) 1397:S2CID 1257:(PDF) 903:veins 901:, or 899:sills 895:dikes 505:topaz 351:beryl 184:boron 167:magma 156:beryl 133:mafic 3039:Tufa 2984:Marl 2899:Coal 2831:Tuff 2206:Type 2085:ISBN 2058:2022 1984:ISSN 1879:ISSN 1814:ISSN 1727:2021 1651:ISBN 1589:ISBN 1563:PMID 1444:ISSN 1389:ISSN 1291:ISBN 1229:ISBN 1201:ISBN 1151:ISBN 1117:ISBN 1083:ISSN 858:and 730:and 583:and 483:and 288:mica 234:and 148:mica 131:and 117:mica 3402:Wad 2271:SiO 2258:SiO 2241:SiO 2228:SiO 2215:SiO 2077:doi 2019:doi 2007:120 1976:doi 1871:doi 1806:doi 1763:doi 1553:PMC 1545:doi 1479:doi 1436:doi 1381:doi 1342:doi 1075:doi 846:is 825:tin 702:ore 666:tin 599:or 443:psi 439:GPa 435:wt% 345:of 294:or 192:tin 3419:: 2083:. 2075:. 2017:. 2005:. 1982:. 1974:. 1964:90 1962:. 1958:. 1912:16 1910:. 1906:. 1877:. 1869:. 1857:. 1826:^ 1812:. 1804:. 1792:. 1769:. 1761:. 1751:43 1749:. 1735:^ 1683:27 1681:. 1677:. 1615:^ 1575:^ 1561:. 1551:. 1543:. 1533:11 1531:. 1527:. 1491:^ 1477:. 1467:60 1465:. 1442:. 1434:. 1424:20 1422:. 1418:. 1395:. 1387:. 1379:. 1369:43 1367:. 1363:. 1340:. 1328:. 1273:^ 1263:. 1259:. 1243:^ 1215:^ 1165:^ 1131:^ 1095:^ 1081:. 1073:. 1061:. 1047:^ 1039:13 1037:. 1033:. 951:, 924:. 897:, 772:, 734:. 692:, 688:, 680:, 676:, 672:, 668:, 664:, 660:, 656:, 507:, 503:, 491:, 456:, 452:, 429:, 282:, 254:. 206:, 202:, 198:, 194:, 190:, 186:, 182:, 178:, 154:, 150:, 146:, 142:, 111:, 95:A 88:, 62:, 50:, 2420:e 2413:t 2406:v 2300:: 2293:: 2286:: 2273:2 2260:2 2251:– 2243:2 2230:2 2217:2 2180:e 2173:t 2166:v 2093:. 2079:: 2060:. 2025:. 2021:: 2013:: 1990:. 1978:: 1970:: 1928:. 1885:. 1873:: 1865:: 1859:8 1820:. 1808:: 1800:: 1794:8 1777:. 1765:: 1757:: 1729:. 1659:. 1597:. 1569:. 1547:: 1539:: 1485:. 1481:: 1473:: 1450:. 1438:: 1430:: 1403:. 1383:: 1375:: 1348:. 1344:: 1336:: 1330:8 1299:. 1265:1 1237:. 1209:. 1159:. 1125:. 1089:. 1077:: 1069:: 1063:8 552:. 20:)

Index

Pegmatites

corundum

lepidolite
tourmaline
quartz
Black Hills
South Dakota

Proterozoic
cirque
mountain glacier
Baffin Island
Nunavut
igneous rock
texture
quartz
feldspar
mica
silicic
granite
intermediate composition
mafic
microcline
quartz
mica
spodumene
beryl
tourmaline

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