194:
33:
362:
vent that is one of oldest vents and erupted 0.01 km (0.0024 cu mi) more than 9500 years BP (cal). Kolgrafarhóll had a small eruption at 0.004 km (0.00096 cu mi) more recent than 7050 years BP (cal) and so did
Borgarhóll 0.001 km (0.00024 cu mi).
418:
field that flowed to the east to the Sog within area of 8.0 km (3.1 sq mi) (0.14 km (0.034 cu mi)) and is more recent than 7050 years BP (cal).. The most northerly vent to the north of Kálfshólar is old at 9500 years BP (cal) or more and called Selhóll-north
321:
lavas, a name not currently used in this context, extending mainly to the south of about 12 km (4.6 sq mi), now covered by up to four more recent lava flows in part. This central area of the field also has the vent Rauðhólar to the south–east, that contributed some of the youngest
308:
towards the middle of the field has 7–8 m (23–26 ft) of the distinctive
Lyngdalsheiði basalt exposed. The maar has a total depth of 55 m (180 ft) with 10 m (33 ft) being water filled.. In a crater row line extending 800 m (2,600 ft) to the south–east from
399:
field. Its vents are Seyðishólar that produced a volume of 0.26 km (0.062 cu mi) dated accurately by tephrochronology to 9500 years BP (cal) and Kerhóll that produced a volume of 0.36 km (0.086 cu mi) also dated well to 7050 years BP (cal). The Kálfshólar
195:
691:Óskarsson, Birgir V.; Riishuus, M.S; Erlendsson, Ögmundur; Askew, Robert A.; Hjartarson, Árni; Sigurgeirsson, Magnús Á.; Brynjólfsson, Skafti; Jakobsson, Sveinn P. (2022).
390:) is separate from the rest of the Grímsnes lava fields with a small eruptive volume of 0.03 km (0.0072 cu mi) and dated to 8200 years BP (cal).
233:
344:, at a volume of 0.009 km (0.0022 cu mi) are much smaller. To the east of the Rauðhólar vent are the also young Kolgrafarhóll
692:
440:
The total volume of lava produced in the lava flows of Grímsnes has been estimated at 1.2 cubic kilometres (0.29 cu mi).
804:
72:
894:
889:
541:
393:
The largest lava field to the north and east of Kerið is the 23.5 km (9.1 sq mi) Seyðishólar-Kerhólahraun
375:) that produced the larger 6.2 km (2.4 sq mi) (0.126 km (0.030 cu mi)) Álftarhólshraun
255:. From these river boundaries at about 20 m (66 ft) the field reaches its highest point at the Seyðishólar
272:
approximates the volcano's last eruption as about 7000 years ago. There are at least ten vents and all have erupted
827:
756:
419:(Selhóll II) with a lava erupted volume of 0.04 km (0.0096 cu mi). To the east of this is Rauðhóll
630:
628:
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171:
seismically active areas. Clicking on the image enlarges to full window and enables mouse-over with more detail.
652:
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in effusive eruptions although one small tephra eruption is known. It has been classified as part of the
205:
119:
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284:
899:
843:
794:
287:. The northern parts of the lava fields overlay lava fields erupted before the last ice age by the
693:"Iceland GeoSurvey (Jarðfræði af jarðfræðikortum) ÍSOR (1:100.000 Geology Maps of Iceland series)"
848:
879:
109:
799:
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261:
cone of 214 m (702 ft). Most of the lava fields are covered by birch and willow.
599:
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Selected geological features near the Grímsnes volcanic system (red outline) and its
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770:(6). Náttúrufraedistofnun Íslands/Museum rerum naturalium Reyknavikensis: 5–35
531:
529:
136:
lava flows (violet shading) and vents (violet outlines). Other shading shows:
32:
868:
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87:
74:
363:
To the south of Selhóll I is the most southern vent of the field Álftarhóll
832:
526:
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201:
216:
and east of the en echelon group of volcanic systems extending across the
738:
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315:
craters. These erupted what was historically called the
Tjarnarhólahraun
248:
232:
The lava fields are spread out to the south-east of the older edifice of
17:
384:
The most eastern vent and its
Borgarhólar lava field (Borgarhólahraun
699:(in Icelandic). Iceland: ÍSOR, Icelandic Institute of Natural History
714:"Postglacial eruptive history of the western volcanic zone, Iceland"
483:
221:
133:
550:, Detailed Description:1. Geological setting and tectonic context.
305:
37:
273:
209:
690:
503:
322:
lavas in the area, which is part of the many vent Rauðhólahraun
55:
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587:
585:
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251:
and reaches to the south the confluence of the Sog with the
298:
164:
subglacial terrain above 1,100 m (3,600 ft), and
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580:
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568:
241:
being bounded to the east by the water body of Álftavatn
711:
559:
516:
514:
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457:
455:
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661:, Detailed Description:4. Eruption history and pattern.
565:
356:
vents and east of that the Selhóll I (Selhóll south)
637:, Detailed Description: Eruption history and pattern.
509:
450:
381:flow, that is less than 7050 years BP (cal).
712:Sinton, J.; Grönvold, K.; Sæmundsson, K. (2005).
406:vent just to the east of Seyðishólar and Kerhóll
866:
674:
658:
634:
605:
547:
535:
484:"National Land Survey of Iceland (Kortasja)"
677:"Catalogue of Icelandic Volcanoes:Grímsnes"
675:Jakobsson, Sveinn; Larsen, Gudrún (2019).
478:
476:
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737:
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340:), that erupted more recently that 7050
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867:
560:Sinton, Grönvold & Sæmundsson 2005
805:List of volcanic eruptions in Iceland
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718:Geochemistry, Geophysics, Geosystems
437:) dated earlier than 7050 BP (cal).
328:flow, although true young Rauðhólar
297:to the north. This is known as the
13:
608:, Detailed Description:Map Layers.
14:
911:
817:
828:Catalogue of Icelandic Volcanoes
31:
757:"The Grimsnés Lavas SW-Iceland"
428:[ˈcʰe(r)tliŋkarˌfjœtl̥]
387:[ˈpɔrkarˌhouːlaˌr̥œyːn]
312:[ˈtʰja(r)tnarˌhouːlar̥]
347:[ˈkʰɔlˌkraːvarˌhoutl̥]
1:
443:
403:[ˈkʰaul(f)sˌhouːlar̥]
396:[ˈcʰɛrˌhouːlaˌr̥œyːn]
325:[ˈrœyðˌhouːlaˌr̥œyːn]
810:List of volcanoes in Iceland
431:) lava field (Rauðhólshraun
412:produced the Kálfshólahraun
227:
7:
895:Volcanic systems of Iceland
783:
659:Jakobsson & Larsen 2019
635:Jakobsson & Larsen 2019
606:Jakobsson & Larsen 2019
548:Jakobsson & Larsen 2019
536:Jakobsson & Larsen 2019
309:Kerið are the Tjarnarhólar
294:[ˈliŋkˌtalsˌheiːðɪ]
258:[ˈseiːðɪsˌhouːlar̥]
220:, that erupted last in the
44:within the volcanic system.
10:
916:
890:South Iceland Seismic Zone
668:
285:South Iceland seismic zone
283:, but is also part of the
264:
15:
415:[-ˌhouːlaˌr̥œyːn]
366:[ˈaul̥tarˌhoutl̥]
337:[ˈsvœyŋkʏˌr̥œyːn]
318:[-ˌhouːlaˌr̥œyːn]
128:
118:
108:
103:
64:
54:
49:
30:
25:
844:Global Volcanism Program
795:List of lakes of Iceland
764:Acta Naturalia Islandica
755:Jakobsson, S.P. (1966).
434:[-ˌhoulsˌr̥œyːn]
378:[-ˌhoulsˌr̥œyːn]
353:[ˈpɔrkarˌhoutl̥]
334:lava flows (Svönkuhraun
244:[ˈaul̥taˌvahtn̥]
212:, located south–east of
200:) is a relatively small
185:Icelandic pronunciation:
60:214 metres (702 ft)
16:For the cargo ship, see
849:Smithsonian Institution
422:[ˈrœyðˌhoutl̥]
150:central volcanoes and
504:Óskarsson et al. 2022
359:[ˈsɛlˌhoutl̥]
281:Western Volcanic Zone
189:[ˈkrimsˌnɛːs]
875:Volcanoes of Iceland
800:Volcanism of Iceland
790:Geography of Iceland
739:10.1029/2005GC001021
538:, Short Description.
331:[-ˌhouːlar̥]
238:[ˈpurˌfɛtl̥]
730:2005GGG.....612009S
372:[-ˌhouːlar]
218:Reykjanes Peninsula
214:Lake Thingvallavatn
84: /
409:[-ˈhoutl̥]
50:Highest point
885:Dormant volcanoes
649:, pp. 14–15.
208:located in South
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88:64.033°N 20.867°W
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270:Tephrochronology
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425:(Kerlingarhóll
350:and Borgarhóll
302:volcanic crater
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247:, on the river
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206:volcanic system
204:or crater row
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818:External links
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594:Jakobsson 1966
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521:Jakobsson 1966
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462:Jakobsson 1966
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291:Lyngdalsheiði
289:shield volcano
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40:- One of many
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880:Fissure vents
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577:, p. 11.
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852:. Retrieved
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833:Volcano Live
772:. Retrieved
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701:. Retrieved
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680:. Retrieved
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523:, p. 5.
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488:. Retrieved
464:, p. 6.
439:
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249:Sog (Sogið)
114:Crater rows
91: /
66:Coordinates
18:SS Grimsnes
869:Categories
854:2021-06-25
839:"Grímsnes"
490:2024-05-08
444:References
143:calderas,
748:1525-2027
697:www.ni.is
596:, Pt. V..
562:, Fig. 1.
228:Geography
124:~3500 BCE
56:Elevation
824:Grímsnes
784:See also
222:Holocene
181:Grímsnes
134:Holocene
26:Grímsnes
826:in the
726:Bibcode
669:Sources
274:olivine
265:Geology
234:Búrfell
210:Iceland
202:fissure
104:Geology
79:20°52′W
746:
724:(12).
486:. 2024
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76:64°2′N
774:8 May
760:(PDF)
703:4 May
682:5 May
306:Kerið
253:Hvítá
38:Kerið
776:2024
744:ISSN
705:2024
684:2024
299:maar
734:doi
304:of
224:.
871::
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841:.
768:II
766:.
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695:.
613:^
582:^
567:^
528:^
511:^
469:^
452:^
342:BP
857:.
778:.
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736::
728::
722:6
707:.
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183:(
20:.
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