Surface form of the south‐western sector of the last Kara Sea Ice Sheet
Recent results concerning the extent of the last Weichselian (Valdaian) Kara Sea Ice Sheet in the area around the Polar Urals and the north‐eastern Russian Plain allow reconstruction of the surface form of this part of the ice sheet by using a combination of moraine‐ridge elevation data and ice‐flow...
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crwiley:10.1111/j.1502-3885.1999.tb00207.x 2024-06-02T08:08:10+00:00 Surface form of the south‐western sector of the last Kara Sea Ice Sheet TVERANGER, JAN ASTAKHOV, VALERY MANGERUD, JAN SVENDSEN, JOHN INGE 1999 http://dx.doi.org/10.1111/j.1502-3885.1999.tb00207.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1999.tb00207.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1999.tb00207.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Boreas volume 28, issue 1, page 81-91 ISSN 0300-9483 1502-3885 journal-article 1999 crwiley https://doi.org/10.1111/j.1502-3885.1999.tb00207.x 2024-05-03T11:03:01Z Recent results concerning the extent of the last Weichselian (Valdaian) Kara Sea Ice Sheet in the area around the Polar Urals and the north‐eastern Russian Plain allow reconstruction of the surface form of this part of the ice sheet by using a combination of moraine‐ridge elevation data and ice‐flow indicators. The resulting reconstruction suggests a thin ice sheet with a pronounced lowering of surface gradient at the transition from bedrock substrate around the Urals to a substrate consisting of unconsolidated sediments in the Pechora Basin. Comparison with similar reconstructions from along the southern and north‐western parts of the Laurentide Ice Sheet margin, for which a deformable‐bed model of glacier dynamics has been proposed, shows strong similarities in surface gradients and ice thicknesses as well in overall sedimentological and morphological characteristics of the associated basal till‐deposits. This suggests comparable styles of glacier dynamics for the two ice sheets. If this first approximation of the Kara Sea Ice Sheet surface form is correct, it can be postulated that at least the south‐western part of the ice sheet was much more mobile and dynamic than previously expected. Article in Journal/Newspaper Ice Sheet Kara Sea Pechora Sea ice Wiley Online Library Kara Sea Moraine Ridge ENVELOPE(168.050,168.050,-72.300,-72.300) Boreas 28 1 81 91 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Recent results concerning the extent of the last Weichselian (Valdaian) Kara Sea Ice Sheet in the area around the Polar Urals and the north‐eastern Russian Plain allow reconstruction of the surface form of this part of the ice sheet by using a combination of moraine‐ridge elevation data and ice‐flow indicators. The resulting reconstruction suggests a thin ice sheet with a pronounced lowering of surface gradient at the transition from bedrock substrate around the Urals to a substrate consisting of unconsolidated sediments in the Pechora Basin. Comparison with similar reconstructions from along the southern and north‐western parts of the Laurentide Ice Sheet margin, for which a deformable‐bed model of glacier dynamics has been proposed, shows strong similarities in surface gradients and ice thicknesses as well in overall sedimentological and morphological characteristics of the associated basal till‐deposits. This suggests comparable styles of glacier dynamics for the two ice sheets. If this first approximation of the Kara Sea Ice Sheet surface form is correct, it can be postulated that at least the south‐western part of the ice sheet was much more mobile and dynamic than previously expected. |
format |
Article in Journal/Newspaper |
author |
TVERANGER, JAN ASTAKHOV, VALERY MANGERUD, JAN SVENDSEN, JOHN INGE |
spellingShingle |
TVERANGER, JAN ASTAKHOV, VALERY MANGERUD, JAN SVENDSEN, JOHN INGE Surface form of the south‐western sector of the last Kara Sea Ice Sheet |
author_facet |
TVERANGER, JAN ASTAKHOV, VALERY MANGERUD, JAN SVENDSEN, JOHN INGE |
author_sort |
TVERANGER, JAN |
title |
Surface form of the south‐western sector of the last Kara Sea Ice Sheet |
title_short |
Surface form of the south‐western sector of the last Kara Sea Ice Sheet |
title_full |
Surface form of the south‐western sector of the last Kara Sea Ice Sheet |
title_fullStr |
Surface form of the south‐western sector of the last Kara Sea Ice Sheet |
title_full_unstemmed |
Surface form of the south‐western sector of the last Kara Sea Ice Sheet |
title_sort |
surface form of the south‐western sector of the last kara sea ice sheet |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.1111/j.1502-3885.1999.tb00207.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1502-3885.1999.tb00207.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1502-3885.1999.tb00207.x |
long_lat |
ENVELOPE(168.050,168.050,-72.300,-72.300) |
geographic |
Kara Sea Moraine Ridge |
geographic_facet |
Kara Sea Moraine Ridge |
genre |
Ice Sheet Kara Sea Pechora Sea ice |
genre_facet |
Ice Sheet Kara Sea Pechora Sea ice |
op_source |
Boreas volume 28, issue 1, page 81-91 ISSN 0300-9483 1502-3885 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1502-3885.1999.tb00207.x |
container_title |
Boreas |
container_volume |
28 |
container_issue |
1 |
container_start_page |
81 |
op_container_end_page |
91 |
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1800753353840394240 |