A long postglacial rhyolitic activity of the Icelandic Krafla volcano during the Eemian: limited impact of glacio-isostasy

Open Access

Issue		BSGF - Earth Sci. Bull. Volume 197, 2026


Article Number		3
Number of page(s)		23
DOI		https://doi.org/10.1051/bsgf/2025020
Published online		16 February 2026

Abbott PM, Griggs AJ, Bourne AJ, Chapman MR, Davies SM. 2018. Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework. Quat Sci Rev 189: 169–186. https://qmro.qmul.ac.uk/xmlui/handle/123456789/55005. [Google Scholar]
Andersen KK, Azuma N, Barnola J-M., Bigler M, Biscaye P, Caillon N, et al. North Greenland Ice Core Project members, 2004. High-resolution record of Northern Hemisphere climate extending into the last interglacial period. Nature 431: 147–151. https://doi.org/10.1038/nature02805. [Google Scholar]
Andreeva IA, Borisovsky SE, Yarmolyuk VV. 2021. Composition and mechanisms of formation of Comendite melts of the early Mesozoic bimodal association of Sant, Central Mongolia. In: Vladykin N, ed. Alkaline rocks kimberlites and carbonatites: geochemistry and genesis. Springer Proc.Earth Envir. Sci. Springer. https://doi.org/10.1007/978-3-030-69670-2_10. [Google Scholar]
Andrews JT McCave IN, Syvitski J. 2021. A ∼240 ka record of ice sheet and ocean interactions on the Snorri Drift, SW of Iceland. Glob Planet Change 201: 103498. https://doi.org/10.1016/j.gloplacha.2021.103498. [Google Scholar]
Ármannsson HA, Gudmunðsson A, Steingrímsson BS. 1987. Exploration and Development of the Krafla geothermal aera. Jökull 13: 13–30. https://doi.org/10.33799/jokull1987.37.013. [Google Scholar]
Árnason K. 2020. New conceptual model for the magma-hydrothermal-tectonic system of Krafla, NE Iceland. Geosciences 10 (1): 34. https://doi.org/10.3390/geosciences10010034. [Google Scholar]
Bazin L, Landais A, Capron E, Masson-Delmotte V, Ritz C, Picard G, et al., 2016. Phase relationships between orbital forcing and the composition of air trapped in Antarctic ice cores, Clim. Past, 12, 729–748, https://doi.org/10.5194/cp-12-729-2016 [Google Scholar]
Bestland EA, Forbes MS, Krull ES, Retallack GJ, Fremd T. 2008. Stratigraphy, paleopedology and geochemistry of the middle Miocene Mascall Formation (type area, central Oregon, USA). Paleo Bios 28 (2): 41–61. http://hdl.handle.net/2328/8893 [Google Scholar]
Birgisdóttir L. 1991. Die palaeo-ozeanographische Entwicklung der Island-See in den letzten 550.000 Jahren. Ber. Sonderforschungsbereich Univ. Kiel 313 (34): 112 p. [Google Scholar]
Bourgeois O, Dauteuil O, Hallot E. 2005. Rifting above a mantle plume: Structure and development of the Iceland Plateau. Geodin Acta 18 (1): 1–22. https://doi.org/10.3166/ga.18.59-80. [Google Scholar]
Bourgeois O, Dauteuil O, Van Vliet-Lanoë B. 1998. Subglacial volcanism in Iceland: tectonic implications. Earth Planet Sci Lett 164 (1/2): 165–178. https://doi.org/10.1016/s0012-821x(98)00201-5 [Google Scholar]
Calderone GM, Grönvold K, Oskarsso N. 1990. The welded air-fall tuff layer at Krafla, northern Iceland: a composite eruption triggered by injection of basaltic magma. J Volcanol Geotherm Res 44: 303–314. https://doi.org/10.1016/0377-0273(90)90024-A. [Google Scholar]
Chazot G, Guillou H, Schneider JL, Van Vliet-Lanoë B. 2013. Middle Pleistocene Activity of the Hekla volcano. EGU 2013, Wien, poster. https://www.researchgate.net/publication/258776991_Middle_Pleistocene_activity_of_the_Hekla_volcano. [Google Scholar]
Choudhury D, Timmermann A, Schloesser F, Heinemann M, Pollard D. 2020. Simulating Marine Isotope Stage 7 with a coupled climate-ice sheet model. Climate Past 16: 2183–2201. https://doi.org/10.5194/cp-16-2183-2020. [Google Scholar]
Cooper C, Swindles GT, Savov IP, Schmidt A, Bacon KL 2010. Evaluating the relationship between climate change and volcanism. Earth Sci Rev 177: 238–247. https://doi.org/10.1016/j.earscirev.2017.11.009. [Google Scholar]
Flude S, Burgess R. McGarvie DW. 2008. Silicic volcanism at Ljósufjöll, Iceland: Insights into evolution and eruptive history from Ar-Ar dating. J Volcanol Geotherm Res 169 (3-4): 154–175. https://doi.org/10.1016/j.jvolgeores.2007.08.019. [Google Scholar]
Friðleifsson G, Ármannsson H, Guðmundsson Á, Árnason K, Mortensen AK, Pálsson B, Einarsson GM. 2014. Iceland deep drilling project: the first well, IDDP-1, drilled into Magma. Geothermics 49: 9–15. https://doi.org/10.1016/j.geothermics.2013.06.001. [Google Scholar]
Fronval T, Jansen E, Haflidason H, Sejrup, HP. 1998. Variability in surface and deep-water conditions in the Nordic Seas during the last interglacial period. Quat Sci Rev 17: 963–985. https://doi.org/10.1016/S0277-3791(98)00038-9. [Google Scholar]
Garcia S, Arnaud N, Angelier J, Bergerat F, Homberg C. 2003. Rift jump process in Northern Iceland since 10 MA for 40Ar/39Ar geochronology. Earth Planet Sci Lett 241: 529–544. https://doi.org/10.1016/s0012-821x(03)00400-x. [Google Scholar]
Geyer AR, Bindeman I. 2011. Glacial influence on caldera-forming. J Volcanol Geotherm Res 202 (1-2): 127–142. https://doi.org/10.1016/j.jvolgeores.2011.02.001. [Google Scholar]
Guðmundsson Á. 2000. Dynamics of volcanic systems in Iceland. Example of tectonism and volcanism at juxtaposed hot spot and mid-ocean ridge systems. Ann Rev Earth Planet Sci 28: 107–140. [Google Scholar]
Guðmundsson Á. 2006. How local stresses control magma chamber ruptures,dyke injections, and eruptions in composite volcanoes. Earth Sci Rev 79: 1–31. https://doi.org/10.1016/j.earscirev.2006.06.006. [Google Scholar]
Guðmundsson Á, Bergerat F, Angelier J. 1996. Off-rift and rift-zone paleostresses in Northwest Iceland. Tectonophysics 255: 211–228. https://doi.org/10.1016/00401951(95)00138-7. [Google Scholar]
Guillou H, Scao V, Nomade S, Van Vliet-Lanoë B, Liorzou C, Guðmundsson Á. 2019. ⁴⁰Ar/ ³⁹Ar dating of the Thorsmork ignimbrite and Icelandic sub-glacial rhyolites. Quat Sci Rev 209: 52–62. https://doi.org/10.1016/j.quascirev.2019.02.014. [Google Scholar]
Guillou H, Scao V, Nomade S, Van Vliet-Lanoë B, Liorzou C, Guðmundsson Á. 2023. Combined unspiked K-Ar and ⁴⁰Ar/ ³⁹Ar dating applied to the dating of 80-260 ka old Icelandic sub-glacial rhyolites. Quat Geochronol 77: 101457. https://doi.org/10.1016/j.quageo.2023.101457. [Google Scholar]
Guillou H, Van Vliet-Lanoë B, Guðmundsson Á, Nomade S. 2010. New unspiked K-Ar ages of Quaternary sub-glacial and sub-aerial volcanic activity in Iceland. Quat Geochronol 5 (1): 10–19. https://doi.org/10.1016/j.quageo.2009.08.007. [Google Scholar]
Hampton RL, Bindeman IN, Stern RA, Coble MA, Rooyakkers SM. 2021. A microanalytical oxygen isotopic and U-Th geochronologic investigation of rhyolite petrogenesis at the Krafla central volcano, Iceland. J Volcanol Geotherm Res 414: 107229. https://doi.org/10.1016/j.jvolgeores.2021.107229. [Google Scholar]
Harning DJ, Þórðarson Þ. Geirsdóttir Á, et al. 2011. Identification of a MIS 6 age (c. 180ka) Icelandic tephra within NE Atlantic sediments: a new potential chronostratigraphic marker. Geol Soc London Spec Publ 398 (1): 65–80. https://doi.org/10.1016/j.quaint.2011.07.033. [Google Scholar]
Harning DJ, Þórðarson Þ, Geirsdóttir Á, Miller GH, Florian CR. 2024. Repeated Early Holocene eruptions of Katla, Iceland, limit the temporal resolution of the Vedde Ash. Bull Volcanol 86 (1): 2. https://doi.org/10.1007/s00445-023-01690-9. [Google Scholar]
Hartley ME, Þórðarson Þ. 2013. The 1874-1876 volcano-tectonic episode at Askja, North Iceland: Lateral flow revisited. Geochem Geophys Geosyst 14 (7): 2286–2309. https://doi.org/10.1002/ggge.20151. [Google Scholar]
Henrich R. 1998. Dynamics of Atlantic water advection to the Norwegian-Greenland Sea, a time-slice record of carbonate distribution in the last three hundred ka. Mar Geol 145: 95–131. https://doi.org/10.1016/S0025-3227(97)00103-5. [Google Scholar]
Hjartardóttir ÁR. 2013. Fissure swarms of the Northern Volcanic Rift Zone, Iceland, PhD dissertation, Earth Sciences, University of Iceland, 138 pp. [Google Scholar]
Hodell DA, Minth EK, Curtis JH, et al. 2009. Surface and deep-water hydrography on Gardar Drift (Iceland Basin) during the last interglacial period. Earth Planet Sci Lett 288: 10–19. https://doi.org/10.1016/j.epsl.2009.08.040. [Google Scholar]
Hooft EE, Brandsdὀttir B, Mjelde R, Shimamura H, Murai Y. 2006. Asymmetric plume-ridge interaction around Iceland: The Kolbeinsey Ridge Iceland Seismic Experiment. Geochem Geophys Geosyst 7: Q05015. https://doi.org/10.1029/2005GC001123. [Google Scholar]
Irvali N, Ninneman US, Kleiven HF, Galaasen EV, Morley A, Rosenthal Y. 2016. Evidence for regional cooling, frontal advances, and East Greenland Ice Sheet changes during the demise of the last interglacial. Quat Sci Rev 150: 184–199. https://doi.org/10.1016/j.quascirev.2016.08.029. [Google Scholar]
Jakobsson SP, Jonasson K, Sigurdsson IA. 2008 The three igneous rock series of Iceland. Jökull 58: 117–138. [Google Scholar]
Jónasson K. 2007. Silicic volcanism in Iceland: Composition and distribution within the active volcanic zones. J Geodyn 43: 101–117. https://doi.org/10.1016/j.jog.2006.09.004. [Google Scholar]
Jull M, McKenzie D. 1996. The effect of deglaciation on mantle melting beneath Iceland. J Geophys Res: Solid Earth 107: 21815–21828. https://doi.org/10.1029/96JB01308. [Google Scholar]
Kessler A, Bouttes N, Roche DM, Ninnemann US, Tjiputra J. 2020. Dynamics of Spontaneous (Multi) Centennial-Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial. Palaeogeogr Palaeoclimatol Palaeoecol 35: e2020PA003913. https://doi.org/10.1029/2020PA003913. [Google Scholar]
Kuritani T, Ohtani E, Kimura IJ. 2011. Intensive hydration of the mantle transition zone beneath China caused by ancient slab stagnation. Nat Geosci 4 (10): 713–716. https://doi.org/10.1038/ngeo1250. [Google Scholar]
Lacasse C, Garbe-Schönberg CD. 2001. Explosive silicic volcanism in Iceland and the Jan Mayen area during the last 6 Ma: sources and timing of major eruptions. J Volcanol Geotherm Res 107: 113–147. https://doi.org/10.1016/S0377-0273(00)00299-7. [Google Scholar]
Lisiecki LE, Raymo ME. 2005. A Pliocene-Pleistocene stack of 57 globally distributed benthic δ¹⁸O records. Paleoceanography 20: PA1003. https://doi.org/10.1029/2004PA001071. [Google Scholar]
Macdonald R, White JC, Belkin HE. 2021. Peralkaline silicic extrusive rocks: magma genesis, evolution, plumbing systems and eruption. CR Géosci 353(S2): 7–59. https://doi.org/10.5802/crgeos.97. [Google Scholar]
Maclennan J, Jull M, McKenzie D, Slater D, Grönvold K. 2002. The link between volcanism and deglaciation in Iceland. Geochem Geophys Geosyst 3: 1062–1087. https//doi.org/10.1029/2001GC000282. [Google Scholar]
Martin E, Sigmarsson O. 2010. Thirteen million years of silicic magma production in Iceland: Links between petrogenesis and tectonic settings. Lithos 116 (1-2): 129–144. https://doi.org/10.1016/j.lithos.2010.01.005.⟨hal-03934669⟩. [Google Scholar]
Medina-Elizalde M. 2013. A global compilation of coral sea-level benchmarks: Implications and new challenges. Earth Planet Sci Lett 362: 310–318. https://doi.org/10.1016/j.epsl.2012.12.001. [Google Scholar]
Moles JN. 2019. Volcanic archives of past glacial environments: Tindfjallajökull Volcano, Iceland. PhD thesis The Open University (Leicester). https://doi.org/10.21954/ou.ro.0000f2a5. [Google Scholar]
Óladóttir BA, Thórdarson T, Geirsdóttir Á, Jóhannsdóttir GE, Mangerud J. 2020, The Saksunarvatn Ash and the G10ka series tephra. Review and current state of knowledge. Quat Geochronol 56: 101041. https://doi.org/10.1016/j.quageo.2019.1010. [Google Scholar]
Pagli C, Sigmundsson F, Lund B. 2007. Glacio-isostatic deformation around the Vatnajökull ice cap, Iceland, induced by recent climate warming: GPS observations and finite element modeling. J Geophys Res: Solid Earth 112: B08405. https://doi.org/10.1029/2006JB004421. [Google Scholar]
Railsback LB, Gibbard PL, Head MJ, Voarintsoa NRG, Toucanne S. 2015. An optimized scheme of lettered marine isotope substages for the last 1.0 million years, andthe climatostratigraphic nature of isotope stages and substages. Quat Sci Rev 111: 94–106. https://doi.org/10.1016/j.quascirev.2015.01.012 [Google Scholar]
Rasmussen TL, Thomsen E, Moros M. 2016. North Atlantic warming during Dansgaard-Oeschger events synchronous with Antarctic warming and out-of-phase with Greenland climate. Sci Rep 6: 20535. https://doi.org/10.1038/srep20535. [Google Scholar]
Riechers K, Rydin-Gorjão L, Hassanibesheli F, Lind PG, Witthaut D, Boers N. 2023. Stable stadial and interstadial states of the last glacial’s climate identified 992 in a combined stable water isotope and dust record from Greenland. Earth Syst Dyn 14: 593–607. https://doi.org/10.5194/esd-14-593-2023994. [Google Scholar]
Rooyakkers SM, Berlo K, Barr SJ. 2020. Emplacement of unusual rhyolitic to basaltic ignimbrites during collapse of a basalt-dominated caldera: the Halarauður eruption, Krafla (Iceland). Geol Soc Am Bull 132: 1881–1902. https://doi.org/10.1130/B35450.1. [Google Scholar]
Rooyakkers SM, Stix J, Berlo K. 2022. Rifting and recharge as triggers of the mixed basalt-rhyolite Halarauður ignimbrite eruption (Krafla, Iceland). Contrib Mineral Petrol 177: 32. https://doi.org/10.1007/s00410-021-01881-7. [Google Scholar]
Sæmundsson K. 1979. Outline of the geology of Iceland. Jökull 29: 7–28. [Google Scholar]
Sæmundsson K, Pringle MS. 2000. Um aldur berglaga Í Kröflukerfinu (on the age of rock strata in the Krafla system). In: Proceedings of the geosciences society of Iceland. Reykjavík: Spring Meeting Abstracts, 26-27, 1. [Google Scholar]
Sæmundsson K, Hjartarson Á, Kaldal I, Sigurgeirsson MÁ, Kristinsson SG, Víkingsson S. 2012. Geological map of the Northern Volcanic Zone, Iceland. Northern Part. 1/100, 00. Iceland Geo-Survey, Reykjavik, Iceland. [Google Scholar]
Schulz KG, Zeebe RE. 2006 Pleistocene glacial terminations triggered by synchronous changes in Southern and Northern Hemisphere insolation: The insolation canon hypothesis. Earth Planet Sci Lett 249 (3-4): 326–336. https://doi.org/10.1016/j.epsl.2006.07.004. [Google Scholar]
Sigmarsson O, Bergþórsdóttir I, Devidal JL, Larsen G, Gannoun A. 2022. Long or short silicic magma residence time beneath Hekla volcano, Iceland? Contrib Mineral Petrol 177 (1): 13. https://uca.hal.science/hal-03594128v1. [Google Scholar]
Sigvaldason GE. 2002. Volcanic and tectonic processes coinciding with glaciation and crustal rebound: an early Holocene rhyolitic eruption in the Dyngjufjöll volcanic centre and the formation of the Askja caldera, north Iceland. Bull Volcanol 64: 192–205. https://doi.org/10.1007/s00445-002-0204-7. [Google Scholar]
Stoops G, Gerard M, Arnalds O. 2007. Micromorphology. In Arnalds O, Bartoli F, Buurman P, Garcia-Rodeja E, Oskarsson H, Stoops G, eds. Soils of Volcanic Regions of Europe. Berlin: Springer-Verlag, pp. 129–140. https://doi.org/10.1007/978-3-540-79134-8_5. [Google Scholar]
Svensson A, Andersen KK, Bigler M, et al. 2008. A 60,000 year Greenland stratigraphic ice core chronology. Climate Past 4: 47–57. https://doi.org10.5194/cp-4-47-2008. [Google Scholar]
Turney CS, Fogwill CJ, Golledge NR, et al. 2020. Last Interglacial Ocean warming drove substantial ice mass loss from Antarctica. Proc Natl Acad Sci USA 117 (8): 3996–4006. https://doi.org/10.1073/pnas.1902469117. [Google Scholar]
Þórðarson Þ, Larsen G. 2007. Volcanism in Iceland in historical time: volcano types, eruption styles and eruptive history. J Geodyn 43: 118–152. https://doi.org/10.1016/j.jog.2006.09.005. [Google Scholar]
Van Vliet-Lanoë B, Andrieu V, Cliquet D, Authemayou C, Le Roy P, Renouf JC. 2024. Sea ice and the middle to recent quaternary: marine high stands in Western Europe. J Coast Res 40 (3): 445–473. https://doi.org/10.2112/JCOASTRES-D-23-00064.1. [Google Scholar]
Van Vliet-Lanoë B, Bergerat F, Allemand P, et al. 2020. Tectonism and volcanism enhanced by deglaciation events in 1038 southern Iceland. Quat Res 94: 94–120. http://doi.org/10.1017/qua.2019.68 [Google Scholar]
Van Vliet-Lanoë B. (ed.), Bergerat F, Geoffroy L, Guillou H, Maury R. 2021. Iceland within the Northern Atlantic, Volume 2: Interactions between Volcanoes and Glaciers ISBN: 978-1-78945-015–6 Sept. V 2021 Wiley -ISTE 272 p. [Google Scholar]
Van Vliet-Lanoë B, Bourgeois O, Dauteuil O, Embry JC, Guillou H, Schneider JL. 2005. Deglaciation and volcano-seismic activity in Northern Iceland: Holocene and early Eemian (The Syðra Formation). Geodyn Acta 18: 81–100. https://doi.org/10.1139/cjes-2017-0126. [Google Scholar]
Van Vliet-Lanoë B, Guðmundsson, Á., Guillou H, Guégan S, van Loon AJ, de Vleeschouwer F. 2010. Glacial Terminations II and I as recorded in NE Iceland. Geologos 16 (4): 201–222. https://doi.org/10.2478/v10118-010-0005-y. [Google Scholar]
Van Vliet-Lanoë B, Knudsen O, Guðmundsson Á., 2020. Volcanoes and climate: the triggering of preboreal Jökulhlaups in Iceland. Int J Earth Sci 109 (3): 847–876. https://doi.org/10.1007/s00531-020-01833-9. [Google Scholar]
Van Vliet-Lanoë B, Schneider JL, Guðmundsson, Á, 2018. Eemian estuarine record forced by glacio-isostasy (Southern Iceland) — link with Greenland and deep-sea records. Can J Earth Sci 55 (2): 154–171. https://doi.org/10.1139/cjes-2017-0126. [Google Scholar]
Van Vliet-Lanoë B, Van Cauwenberge AS, Bourgeois O, Dauteuil O, Schneider JL, 2001. A candidate for the Last Interglacial record in Northern Iceland: The Sydra Formation. Stratigraphy and sedimentology. CR de l’Acad Sci, série II Paris, 332: 577–584. https://doi.org/10.1016/S1251-8050(01)01570-1. [Google Scholar]
Wallrabe-Adams HJ, Lackschewitz KS. 2003. Chemical composition, distribution, and origin of silicic volcanic ash layers in the Greenland-Iceland-Norwegian Sea: 1067 explosive volcanism from 10 to 300 ka as recorded in deep-sea sediments. Mar Geol 193 (3-4): 273–293. https://doi.org/10.1016/S0025-3227(02)00661-8. [Google Scholar]
Wastegård S, Rasmussen TL. 2001. New tephra horizons from oxygen isotope stage 5 in the North Atlantic: correlation potential for terrestrial, marine and ice-core archives. Quat Sci Rev 20: 1587–1593. https://doi.org/10.1016/S0277-10723791(01)00055-5. [Google Scholar]
Weber G, Castro JM. 2017. Phase petrology reveals shallow magma storage prior to large explosive silicic eruptions at Hekla volcano, Iceland. Earth Planet Sci Lett 466: 168–180. https://doi.org/10.1016/j.epsl.2017.03.015. [Google Scholar]
Wendt KA, Li X, Edwards RL, Cheng H, Spötl C. 2021. Precise timing of MIS 7 substages from the Austrian Alps. Climate Past 17: 1443–1454. https://doi.org/10.5194/cp-17-1443-2021. [Google Scholar]

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