Late Quaternary glacial and deglacial history of eastern Vestfirdir, Iceland using cosmogenic isotope ( 36 Cl) exposure ages and marine cores
Abstract The late glacial and deglacial history of Vestfirdir, NW Iceland is interpreted from terrestrial field‐based evidence and compared with marine cores and seismic studies. Understanding the timing of deglaciation is complicated by a lack of dateable organic material on land, uncertainties ass...
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crwiley:10.1002/jqs.978 2024-04-28T08:25:43+00:00 Late Quaternary glacial and deglacial history of eastern Vestfirdir, Iceland using cosmogenic isotope ( 36 Cl) exposure ages and marine cores Principato, Sarah M. Geirsdóttir, Áslaug Jóhannsdóttir, Gudrún Eva Andrews, John T. 2006 http://dx.doi.org/10.1002/jqs.978 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.978 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.978 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 21, issue 3, page 271-285 ISSN 0267-8179 1099-1417 Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) journal-article 2006 crwiley https://doi.org/10.1002/jqs.978 2024-04-02T08:44:32Z Abstract The late glacial and deglacial history of Vestfirdir, NW Iceland is interpreted from terrestrial field‐based evidence and compared with marine cores and seismic studies. Understanding the timing of deglaciation is complicated by a lack of dateable organic material on land, uncertainties associated with interpretation of diamictons, and ambiguities in radiocarbon dating. New 36 Cl exposure ages of boulders and bedrock surfaces suggest that at least part of the coastal uplands were ice‐free by approximately 20 ka. Deglaciation of the valleys followed. Boulders from the crest of an end‐moraine in the Selá river valley have a mean 36 Cl age of 14.6 ka ± 0.8 ka ( n = 4), and the outermost moraine in the valley adjacent to Kaldalónjökull has a mean 36 Cl age of 11.7 ka ± 0.9 ka ( n = 2). Tephrochronology provides a link between the terrestrial and marine sequences around Vestfirdir. The Vedde Ash (ca. 12 k cal. yr BP) is present in some offshore cores, but it is absent from terrestrial sites, suggesting that its distribution provides a constraint on ice extent during the Younger Dryas. The Saksunarvatn Ash (10.2 ± 0.6 k cal. yr BP), confirmed by geochemical analyses and radiocarbon dating, is present in at least three terrestrial locations on eastern Vestfirdir and in many cores from the fjords and shelf, which constrains early Holocene ice extent. Copyright © 2006 John Wiley & Sons, Ltd. Article in Journal/Newspaper Iceland Wiley Online Library Journal of Quaternary Science 21 3 271 285 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) |
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Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) Principato, Sarah M. Geirsdóttir, Áslaug Jóhannsdóttir, Gudrún Eva Andrews, John T. Late Quaternary glacial and deglacial history of eastern Vestfirdir, Iceland using cosmogenic isotope ( 36 Cl) exposure ages and marine cores |
topic_facet |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) |
description |
Abstract The late glacial and deglacial history of Vestfirdir, NW Iceland is interpreted from terrestrial field‐based evidence and compared with marine cores and seismic studies. Understanding the timing of deglaciation is complicated by a lack of dateable organic material on land, uncertainties associated with interpretation of diamictons, and ambiguities in radiocarbon dating. New 36 Cl exposure ages of boulders and bedrock surfaces suggest that at least part of the coastal uplands were ice‐free by approximately 20 ka. Deglaciation of the valleys followed. Boulders from the crest of an end‐moraine in the Selá river valley have a mean 36 Cl age of 14.6 ka ± 0.8 ka ( n = 4), and the outermost moraine in the valley adjacent to Kaldalónjökull has a mean 36 Cl age of 11.7 ka ± 0.9 ka ( n = 2). Tephrochronology provides a link between the terrestrial and marine sequences around Vestfirdir. The Vedde Ash (ca. 12 k cal. yr BP) is present in some offshore cores, but it is absent from terrestrial sites, suggesting that its distribution provides a constraint on ice extent during the Younger Dryas. The Saksunarvatn Ash (10.2 ± 0.6 k cal. yr BP), confirmed by geochemical analyses and radiocarbon dating, is present in at least three terrestrial locations on eastern Vestfirdir and in many cores from the fjords and shelf, which constrains early Holocene ice extent. Copyright © 2006 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Principato, Sarah M. Geirsdóttir, Áslaug Jóhannsdóttir, Gudrún Eva Andrews, John T. |
author_facet |
Principato, Sarah M. Geirsdóttir, Áslaug Jóhannsdóttir, Gudrún Eva Andrews, John T. |
author_sort |
Principato, Sarah M. |
title |
Late Quaternary glacial and deglacial history of eastern Vestfirdir, Iceland using cosmogenic isotope ( 36 Cl) exposure ages and marine cores |
title_short |
Late Quaternary glacial and deglacial history of eastern Vestfirdir, Iceland using cosmogenic isotope ( 36 Cl) exposure ages and marine cores |
title_full |
Late Quaternary glacial and deglacial history of eastern Vestfirdir, Iceland using cosmogenic isotope ( 36 Cl) exposure ages and marine cores |
title_fullStr |
Late Quaternary glacial and deglacial history of eastern Vestfirdir, Iceland using cosmogenic isotope ( 36 Cl) exposure ages and marine cores |
title_full_unstemmed |
Late Quaternary glacial and deglacial history of eastern Vestfirdir, Iceland using cosmogenic isotope ( 36 Cl) exposure ages and marine cores |
title_sort |
late quaternary glacial and deglacial history of eastern vestfirdir, iceland using cosmogenic isotope ( 36 cl) exposure ages and marine cores |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1002/jqs.978 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.978 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.978 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Journal of Quaternary Science volume 21, issue 3, page 271-285 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.978 |
container_title |
Journal of Quaternary Science |
container_volume |
21 |
container_issue |
3 |
container_start_page |
271 |
op_container_end_page |
285 |
_version_ |
1797585421157269504 |