Palaeolake sediment records reveal a mid‐ to late Younger Dryas ice‐sheet maximum in Mid‐Norway
We present a revised chronology of the Scandinavian Ice Sheet’s glacial maximum during the Younger Dryas (Tautra event) in Mid‐Norway. Sediment records from palaeolakes near Leksvik show the occurrence of thick, laminated silt units with numerous dropstones between organic‐rich units and indicate th...
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crwiley:10.1111/bor.12543 2024-06-02T08:08:14+00:00 Palaeolake sediment records reveal a mid‐ to late Younger Dryas ice‐sheet maximum in Mid‐Norway Høgaas, Fredrik Larsson, Simon A. Klug, Martin Olsen, Lars Wastegård, Stefan Vetenskapsrådet 2021 http://dx.doi.org/10.1111/bor.12543 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12543 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bor.12543 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Boreas volume 51, issue 1, page 41-60 ISSN 0300-9483 1502-3885 journal-article 2021 crwiley https://doi.org/10.1111/bor.12543 2024-05-03T11:31:10Z We present a revised chronology of the Scandinavian Ice Sheet’s glacial maximum during the Younger Dryas (Tautra event) in Mid‐Norway. Sediment records from palaeolakes near Leksvik show the occurrence of thick, laminated silt units with numerous dropstones between organic‐rich units and indicate that a proglacial lake was dammed between the Tautra ice margin and a local spillway. Ash beds and several radiocarbon‐dated plant macrofossil samples from corresponding stratigraphical sequences in different basins provide robust chronological constraints for the timing and duration of the proglacial lake and, consequently, the Tautra event. The existing chronological constraints on the Tautra event suggest that the glacial episode occurred at 12.9–12.6 ka. Our new chronology indicates that the Younger Dryas ice‐sheet re‐advance culminated close to 12.1 cal. ka BP, maintained this position for a maximum of 700 years and started retreating inland at c . 11.4 cal. ka BP. Our revised age for retreat from the Younger Dryas glacial maximum thus differs from the existing deglaciation chronology by approximately a thousand years, and hints at a similar late Younger Dryas glacial maximum throughout most of southern Norway. Article in Journal/Newspaper Ice Sheet Wiley Online Library Norway Tautra ENVELOPE(12.518,12.518,66.283,66.283) Boreas 51 1 41 60 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
We present a revised chronology of the Scandinavian Ice Sheet’s glacial maximum during the Younger Dryas (Tautra event) in Mid‐Norway. Sediment records from palaeolakes near Leksvik show the occurrence of thick, laminated silt units with numerous dropstones between organic‐rich units and indicate that a proglacial lake was dammed between the Tautra ice margin and a local spillway. Ash beds and several radiocarbon‐dated plant macrofossil samples from corresponding stratigraphical sequences in different basins provide robust chronological constraints for the timing and duration of the proglacial lake and, consequently, the Tautra event. The existing chronological constraints on the Tautra event suggest that the glacial episode occurred at 12.9–12.6 ka. Our new chronology indicates that the Younger Dryas ice‐sheet re‐advance culminated close to 12.1 cal. ka BP, maintained this position for a maximum of 700 years and started retreating inland at c . 11.4 cal. ka BP. Our revised age for retreat from the Younger Dryas glacial maximum thus differs from the existing deglaciation chronology by approximately a thousand years, and hints at a similar late Younger Dryas glacial maximum throughout most of southern Norway. |
author2 |
Vetenskapsrådet |
format |
Article in Journal/Newspaper |
author |
Høgaas, Fredrik Larsson, Simon A. Klug, Martin Olsen, Lars Wastegård, Stefan |
spellingShingle |
Høgaas, Fredrik Larsson, Simon A. Klug, Martin Olsen, Lars Wastegård, Stefan Palaeolake sediment records reveal a mid‐ to late Younger Dryas ice‐sheet maximum in Mid‐Norway |
author_facet |
Høgaas, Fredrik Larsson, Simon A. Klug, Martin Olsen, Lars Wastegård, Stefan |
author_sort |
Høgaas, Fredrik |
title |
Palaeolake sediment records reveal a mid‐ to late Younger Dryas ice‐sheet maximum in Mid‐Norway |
title_short |
Palaeolake sediment records reveal a mid‐ to late Younger Dryas ice‐sheet maximum in Mid‐Norway |
title_full |
Palaeolake sediment records reveal a mid‐ to late Younger Dryas ice‐sheet maximum in Mid‐Norway |
title_fullStr |
Palaeolake sediment records reveal a mid‐ to late Younger Dryas ice‐sheet maximum in Mid‐Norway |
title_full_unstemmed |
Palaeolake sediment records reveal a mid‐ to late Younger Dryas ice‐sheet maximum in Mid‐Norway |
title_sort |
palaeolake sediment records reveal a mid‐ to late younger dryas ice‐sheet maximum in mid‐norway |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/bor.12543 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bor.12543 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/bor.12543 |
long_lat |
ENVELOPE(12.518,12.518,66.283,66.283) |
geographic |
Norway Tautra |
geographic_facet |
Norway Tautra |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Boreas volume 51, issue 1, page 41-60 ISSN 0300-9483 1502-3885 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/bor.12543 |
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Boreas |
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51 |
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1 |
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41 |
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60 |
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1800753438418534400 |