Timing of the younger dryas glacial maximum in western Norway
Abstract This study precisely constrains the timing of the Younger Dryas (YD) glacial maximum in south‐western Norway by utilizing sediment records from lake basins. Two of the basins, located on the distal side of the mapped Herdla–Halsnøy Moraine, received meltwater directly from the ice sheet onl...
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crwiley:10.1002/jqs.1516 2024-09-09T19:45:13+00:00 Timing of the younger dryas glacial maximum in western Norway Lohne, Øystein S. Mangerud, Jan Svendsen, John Inge 2011 http://dx.doi.org/10.1002/jqs.1516 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1516 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1516 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 27, issue 1, page 81-88 ISSN 0267-8179 1099-1417 journal-article 2011 crwiley https://doi.org/10.1002/jqs.1516 2024-06-18T04:13:10Z Abstract This study precisely constrains the timing of the Younger Dryas (YD) glacial maximum in south‐western Norway by utilizing sediment records from lake basins. Two of the basins, located on the distal side of the mapped Herdla–Halsnøy Moraine, received meltwater directly from the ice sheet only when the ice margin reached its maximum extent during the YD. In the cores, the ice maximum is represented by well‐defined units with meltwater deposits, dominantly laminated silt. Plant macrofossils in the sediment sequences are common and we obtained 18 radiocarbon ages from one of the cores. By applying Bayesian age–depth modelling we obtained a precise date for this meltwater event and thereby also for the timing of the YD glacial maximum. We conclude that the ice‐sheet advance culminated at the Halsnøy Moraine at 11 760 ± 120 cal a BP, and that the ice margin stayed in this position for 170 ± 120 years. The subsequent retreat started at 11 590 ± 100 cal a BP, i.e. close to the YD/Holocene boundary. Withdrawal was probably triggered by abrupt climatic warming at this time. Copyright © 2011 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice Sheet Wiley Online Library Norway Journal of Quaternary Science 27 1 81 88 |
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Wiley Online Library |
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English |
description |
Abstract This study precisely constrains the timing of the Younger Dryas (YD) glacial maximum in south‐western Norway by utilizing sediment records from lake basins. Two of the basins, located on the distal side of the mapped Herdla–Halsnøy Moraine, received meltwater directly from the ice sheet only when the ice margin reached its maximum extent during the YD. In the cores, the ice maximum is represented by well‐defined units with meltwater deposits, dominantly laminated silt. Plant macrofossils in the sediment sequences are common and we obtained 18 radiocarbon ages from one of the cores. By applying Bayesian age–depth modelling we obtained a precise date for this meltwater event and thereby also for the timing of the YD glacial maximum. We conclude that the ice‐sheet advance culminated at the Halsnøy Moraine at 11 760 ± 120 cal a BP, and that the ice margin stayed in this position for 170 ± 120 years. The subsequent retreat started at 11 590 ± 100 cal a BP, i.e. close to the YD/Holocene boundary. Withdrawal was probably triggered by abrupt climatic warming at this time. Copyright © 2011 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Lohne, Øystein S. Mangerud, Jan Svendsen, John Inge |
spellingShingle |
Lohne, Øystein S. Mangerud, Jan Svendsen, John Inge Timing of the younger dryas glacial maximum in western Norway |
author_facet |
Lohne, Øystein S. Mangerud, Jan Svendsen, John Inge |
author_sort |
Lohne, Øystein S. |
title |
Timing of the younger dryas glacial maximum in western Norway |
title_short |
Timing of the younger dryas glacial maximum in western Norway |
title_full |
Timing of the younger dryas glacial maximum in western Norway |
title_fullStr |
Timing of the younger dryas glacial maximum in western Norway |
title_full_unstemmed |
Timing of the younger dryas glacial maximum in western Norway |
title_sort |
timing of the younger dryas glacial maximum in western norway |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1002/jqs.1516 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1516 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1516 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Journal of Quaternary Science volume 27, issue 1, page 81-88 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1516 |
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Journal of Quaternary Science |
container_volume |
27 |
container_issue |
1 |
container_start_page |
81 |
op_container_end_page |
88 |
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1809914838119350272 |