An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland:Sedimentary facies, foraminifera, and molluscs
Sedimentary facies, foraminifera, and molluscs are used to reconstruct environmental conditions during the accumulation of the 1.5 Ma Svarthamar Member unit from the Tjörnes sequence, North Iceland. The Tjörnes sequence and the Breidavík Group in particular contains a unique record of Cainozoic glac...
Published in: | Quaternary Science Reviews |
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Language: | English |
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1992
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Online Access: | https://pure.au.dk/portal/da/publications/an-early-pleistocene-glacialinterglacial-cycle-in-the-breida-vik-group-on-tjoernes-iceland(f2ebac7f-211d-4d39-87f2-65b9293c2e77).html https://doi.org/10.1016/0277-3791(92)90080-R http://www.scopus.com/inward/record.url?scp=0027037329&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/f2ebac7f-211d-4d39-87f2-65b9293c2e77 2023-05-15T14:56:09+02:00 An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland:Sedimentary facies, foraminifera, and molluscs Eiríksson, Jón Knudsen, Karen Luise Vilhjálmsson, Már 1992-01-01 https://pure.au.dk/portal/da/publications/an-early-pleistocene-glacialinterglacial-cycle-in-the-breida-vik-group-on-tjoernes-iceland(f2ebac7f-211d-4d39-87f2-65b9293c2e77).html https://doi.org/10.1016/0277-3791(92)90080-R http://www.scopus.com/inward/record.url?scp=0027037329&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Eiríksson , J , Knudsen , K L & Vilhjálmsson , M 1992 , ' An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland : Sedimentary facies, foraminifera, and molluscs ' , Quaternary Science Reviews , vol. 11 , no. 7-8 , pp. 733-757 . https://doi.org/10.1016/0277-3791(92)90080-R article 1992 ftuniaarhuspubl https://doi.org/10.1016/0277-3791(92)90080-R 2022-12-07T23:54:30Z Sedimentary facies, foraminifera, and molluscs are used to reconstruct environmental conditions during the accumulation of the 1.5 Ma Svarthamar Member unit from the Tjörnes sequence, North Iceland. The Tjörnes sequence and the Breidavík Group in particular contains a unique record of Cainozoic glacier variations in the North Atlantic. This is reflected in lithological variations where marine and terrestrial sediments are intercalated between lava flows and pyroclastic rocks on Tjörnes Peninsula. Our results from the Svarthamar Member show that the lithological cycle from glacial to proglacial and then to shallow marine sedimentation coincide with faunal succession, reflecting a change from arctic to boreal arctic or even boreal conditions in the sea around Iceland just after the Olduvai event of the Matuyama. The amplitude of this climatic cycle is comparable to the Late Pleistocene glacial-interglacial cycles in the North Atlantic. This indicates that the North Atlantic current crossed the Greenland-Iceland and Iceland-Faroe ridges during interglacial periods resulting in a periodic northward shift of the polar front during at least a part of the Early Pleistocene. Article in Journal/Newspaper Arctic Foraminifera* glacier glacier Greenland Iceland north atlantic current North Atlantic Aarhus University: Research Arctic Breida ENVELOPE(9.967,9.967,62.845,62.845) Greenland Tjörnes ENVELOPE(-17.087,-17.087,66.152,66.152) Vík ENVELOPE(-18.762,-18.762,66.136,66.136) Quaternary Science Reviews 11 7-8 733 757 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
Sedimentary facies, foraminifera, and molluscs are used to reconstruct environmental conditions during the accumulation of the 1.5 Ma Svarthamar Member unit from the Tjörnes sequence, North Iceland. The Tjörnes sequence and the Breidavík Group in particular contains a unique record of Cainozoic glacier variations in the North Atlantic. This is reflected in lithological variations where marine and terrestrial sediments are intercalated between lava flows and pyroclastic rocks on Tjörnes Peninsula. Our results from the Svarthamar Member show that the lithological cycle from glacial to proglacial and then to shallow marine sedimentation coincide with faunal succession, reflecting a change from arctic to boreal arctic or even boreal conditions in the sea around Iceland just after the Olduvai event of the Matuyama. The amplitude of this climatic cycle is comparable to the Late Pleistocene glacial-interglacial cycles in the North Atlantic. This indicates that the North Atlantic current crossed the Greenland-Iceland and Iceland-Faroe ridges during interglacial periods resulting in a periodic northward shift of the polar front during at least a part of the Early Pleistocene. |
format |
Article in Journal/Newspaper |
author |
Eiríksson, Jón Knudsen, Karen Luise Vilhjálmsson, Már |
spellingShingle |
Eiríksson, Jón Knudsen, Karen Luise Vilhjálmsson, Már An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland:Sedimentary facies, foraminifera, and molluscs |
author_facet |
Eiríksson, Jón Knudsen, Karen Luise Vilhjálmsson, Már |
author_sort |
Eiríksson, Jón |
title |
An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland:Sedimentary facies, foraminifera, and molluscs |
title_short |
An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland:Sedimentary facies, foraminifera, and molluscs |
title_full |
An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland:Sedimentary facies, foraminifera, and molluscs |
title_fullStr |
An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland:Sedimentary facies, foraminifera, and molluscs |
title_full_unstemmed |
An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland:Sedimentary facies, foraminifera, and molluscs |
title_sort |
early pleistocene glacial-interglacial cycle in the breida vík group on tjörnes, iceland:sedimentary facies, foraminifera, and molluscs |
publishDate |
1992 |
url |
https://pure.au.dk/portal/da/publications/an-early-pleistocene-glacialinterglacial-cycle-in-the-breida-vik-group-on-tjoernes-iceland(f2ebac7f-211d-4d39-87f2-65b9293c2e77).html https://doi.org/10.1016/0277-3791(92)90080-R http://www.scopus.com/inward/record.url?scp=0027037329&partnerID=8YFLogxK |
long_lat |
ENVELOPE(9.967,9.967,62.845,62.845) ENVELOPE(-17.087,-17.087,66.152,66.152) ENVELOPE(-18.762,-18.762,66.136,66.136) |
geographic |
Arctic Breida Greenland Tjörnes Vík |
geographic_facet |
Arctic Breida Greenland Tjörnes Vík |
genre |
Arctic Foraminifera* glacier glacier Greenland Iceland north atlantic current North Atlantic |
genre_facet |
Arctic Foraminifera* glacier glacier Greenland Iceland north atlantic current North Atlantic |
op_source |
Eiríksson , J , Knudsen , K L & Vilhjálmsson , M 1992 , ' An early pleistocene glacial-interglacial cycle in the breida vík group on Tjörnes, Iceland : Sedimentary facies, foraminifera, and molluscs ' , Quaternary Science Reviews , vol. 11 , no. 7-8 , pp. 733-757 . https://doi.org/10.1016/0277-3791(92)90080-R |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/0277-3791(92)90080-R |
container_title |
Quaternary Science Reviews |
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11 |
container_issue |
7-8 |
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733 |
op_container_end_page |
757 |
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1766328185174097920 |