Glacial Terminations II and I as recorded in NE Iceland
Volcanism in eastern Iceland has controlled the changes in glacier- and river-drainage patterns and the sedimentary budget, particularly during the Middle and Late Pleistocene. The glacial extent in NE Iceland appears to be related to the impact of volcanic activity, not only on the ice-stream dynam...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2010
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ftumeauniv:oai:DiVA.org:umu-199571 2023-10-09T21:51:46+02:00 Glacial Terminations II and I as recorded in NE Iceland van Vliet-Lanoë, Brigitte Gudmundsson, Agust Guillou, Hervé Guégan, Soléne van Tom Loon, A.J. De Vleeschouwer, Francois 2010 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-199571 https://doi.org/10.2478/v10118-010-0005-y eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap UMR 6538 CNRS Domaines Océaniques, IUEM, Place N. Copernic, 29480 Plouzané, France JFS Geological Services, Raudagerdi 31, 108 Reykjavik, Iceland Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Bât. 12, Avenue de la Terrasse, 91198 Giff sur Yvette, France Geological Institute, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznań, Poland Sciendo Geologos, 1426-8981, 2010, 16:4, s. 201-222 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-199571 doi:10.2478/v10118-010-0005-y ISI:000434899200001 Scopus 2-s2.0-79251565287 info:eu-repo/semantics/openAccess Deglaciation Ice-stream patterns Iceland Last glacial maximum Mid-eemian cooling Palaeolake Physical Geography Naturgeografi Climate Research Klimatforskning Article in journal info:eu-repo/semantics/article text 2010 ftumeauniv https://doi.org/10.2478/v10118-010-0005-y 2023-09-22T13:56:15Z Volcanism in eastern Iceland has controlled the changes in glacier- and river-drainage patterns and the sedimentary budget, particularly during the Middle and Late Pleistocene. The glacial extent in NE Iceland appears to be related to the impact of volcanic activity, not only on the ice-stream dynamics, but also on the sedimentary successions. Analysis of the Jökuldalur and Jökulsa á Brù records results in a new interpretation of the changes in ice extent and flow direction for at least the last two glaciations. From MIS 8 onward, the development of the Snæfell volcano apparently forced the ice stream that derived from the Vatnajökull ice cap to take another course; it also affected the offshore sedimentary budgets at the new outlet at Vopnafjördur. The MIS 6 ice sheet was thick and extensive, and associated with an ice-stream diversion to the North. The thick sedimentary complex of palaeolake Halslón was formed close to an outlet of the Vatnajökull, the Brùarjökull, during Termination II and a part of the MIS 5e interglacial. The deposits formed during MIS 5e record two climate optima interrupted by two successive glacial advances correlated with the mid-Eemian cooling. The deposits of the Weichselian deglaciation (Termination I) are much more limited in thickness. During the Last Glacial Maximum and the Late Glacial, glaciers also seem to have been restricted in the Jökulsa á Brù area. Valley glaciers issued from the Brùarjökull re-advanced several times in the Jökuldalur only during at least the Older Dryas, the Younger Dryas and the Preboreal. NE Iceland has undergone considerable deglaciation since the Bølling. In contrast to the conclusions of previous studies, the results presented here are consistent with data on the glaciations in other Nordic regions and can increase the understanding of the mid-Eemian cooling. Article in Journal/Newspaper glacier Ice cap Ice Sheet Iceland Vatnajökull Umeå University: Publications (DiVA) Jökuldalur ENVELOPE(-13.886,-13.886,65.510,65.510) Snæfell ENVELOPE(-16.201,-16.201,64.227,64.227) Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) Geologos 16 4 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Deglaciation Ice-stream patterns Iceland Last glacial maximum Mid-eemian cooling Palaeolake Physical Geography Naturgeografi Climate Research Klimatforskning |
spellingShingle |
Deglaciation Ice-stream patterns Iceland Last glacial maximum Mid-eemian cooling Palaeolake Physical Geography Naturgeografi Climate Research Klimatforskning van Vliet-Lanoë, Brigitte Gudmundsson, Agust Guillou, Hervé Guégan, Soléne van Tom Loon, A.J. De Vleeschouwer, Francois Glacial Terminations II and I as recorded in NE Iceland |
topic_facet |
Deglaciation Ice-stream patterns Iceland Last glacial maximum Mid-eemian cooling Palaeolake Physical Geography Naturgeografi Climate Research Klimatforskning |
description |
Volcanism in eastern Iceland has controlled the changes in glacier- and river-drainage patterns and the sedimentary budget, particularly during the Middle and Late Pleistocene. The glacial extent in NE Iceland appears to be related to the impact of volcanic activity, not only on the ice-stream dynamics, but also on the sedimentary successions. Analysis of the Jökuldalur and Jökulsa á Brù records results in a new interpretation of the changes in ice extent and flow direction for at least the last two glaciations. From MIS 8 onward, the development of the Snæfell volcano apparently forced the ice stream that derived from the Vatnajökull ice cap to take another course; it also affected the offshore sedimentary budgets at the new outlet at Vopnafjördur. The MIS 6 ice sheet was thick and extensive, and associated with an ice-stream diversion to the North. The thick sedimentary complex of palaeolake Halslón was formed close to an outlet of the Vatnajökull, the Brùarjökull, during Termination II and a part of the MIS 5e interglacial. The deposits formed during MIS 5e record two climate optima interrupted by two successive glacial advances correlated with the mid-Eemian cooling. The deposits of the Weichselian deglaciation (Termination I) are much more limited in thickness. During the Last Glacial Maximum and the Late Glacial, glaciers also seem to have been restricted in the Jökulsa á Brù area. Valley glaciers issued from the Brùarjökull re-advanced several times in the Jökuldalur only during at least the Older Dryas, the Younger Dryas and the Preboreal. NE Iceland has undergone considerable deglaciation since the Bølling. In contrast to the conclusions of previous studies, the results presented here are consistent with data on the glaciations in other Nordic regions and can increase the understanding of the mid-Eemian cooling. |
format |
Article in Journal/Newspaper |
author |
van Vliet-Lanoë, Brigitte Gudmundsson, Agust Guillou, Hervé Guégan, Soléne van Tom Loon, A.J. De Vleeschouwer, Francois |
author_facet |
van Vliet-Lanoë, Brigitte Gudmundsson, Agust Guillou, Hervé Guégan, Soléne van Tom Loon, A.J. De Vleeschouwer, Francois |
author_sort |
van Vliet-Lanoë, Brigitte |
title |
Glacial Terminations II and I as recorded in NE Iceland |
title_short |
Glacial Terminations II and I as recorded in NE Iceland |
title_full |
Glacial Terminations II and I as recorded in NE Iceland |
title_fullStr |
Glacial Terminations II and I as recorded in NE Iceland |
title_full_unstemmed |
Glacial Terminations II and I as recorded in NE Iceland |
title_sort |
glacial terminations ii and i as recorded in ne iceland |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2010 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-199571 https://doi.org/10.2478/v10118-010-0005-y |
long_lat |
ENVELOPE(-13.886,-13.886,65.510,65.510) ENVELOPE(-16.201,-16.201,64.227,64.227) ENVELOPE(-16.823,-16.823,64.420,64.420) |
geographic |
Jökuldalur Snæfell Vatnajökull |
geographic_facet |
Jökuldalur Snæfell Vatnajökull |
genre |
glacier Ice cap Ice Sheet Iceland Vatnajökull |
genre_facet |
glacier Ice cap Ice Sheet Iceland Vatnajökull |
op_relation |
Geologos, 1426-8981, 2010, 16:4, s. 201-222 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-199571 doi:10.2478/v10118-010-0005-y ISI:000434899200001 Scopus 2-s2.0-79251565287 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.2478/v10118-010-0005-y |
container_title |
Geologos |
container_volume |
16 |
container_issue |
4 |
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1779314873075761152 |