2006: The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics
a period of periglacial conditions. Till of the last SIS, Bobrovo till, overlies glacial deposits from the previous Barents and Kara Sea ice sheets and marine deposits of the Last Interglacial. The till is identified by its contents of Scandinavian erratics and it has directional properties of weste...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.587.4434 2023-05-15T16:40:00+02:00 2006: The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics Igor N. Demidov Michael Houmark-nielsen Kurt H. Kjær Eiliv Larsen The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.4434 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.4434 Metadata may be used without restrictions as long as the oai identifier remains attached to it. https://notendur.hi.is/~oi/AG-326 2006 readings/Scandinavia and White Sea area/Demidov et al 2006.pdf text ftciteseerx 2016-01-08T13:19:19Z a period of periglacial conditions. Till of the last SIS, Bobrovo till, overlies glacial deposits from the previous Barents and Kara Sea ice sheets and marine deposits of the Last Interglacial. The till is identified by its contents of Scandinavian erratics and it has directional properties of westerly provenance. Above the deglaciation sediments, and extra marginally, it is replaced by glaciofluvial and glaciolacustrine deposits. At its maximum extent, the last SIS was more restricted in Russia than previously outlined and the time of termination at 1816 cal. kyr BP was almost 10 kyr delayed compared to the southwestern part of the ice sheet. We argue that the lithology of the ice sheets ’ substrate, and especially the location of former proglacial lake basins, influenced the dynamics of the ice sheet and guided the direction of flow. We advocate that, while reaching the maximum extent, lobe-shaped glaciers protruded eastward from SIS and moved along the path of water-filled lowland basins. Ice-sheet collapse and deglaciation in the region commenced when ice lobes were detached from the main ice sheet. During the Lateglacial warming, disintegration and melting took place in a 200600 km wide zone along the northeastern rim of SIS associated with thick Quaternary accumulations. Deglaciation occurred through aerial downwasting within large fields of dead ice developed during successively detached ice lobes. Deglaciation led to the development of hummocky moraine landscapes with scattered periglacial and ice-dammed lakes, while a sub- Text Ice Sheet Kara Sea Sea ice Unknown Bobrovo ENVELOPE(41.193,41.193,64.350,64.350) Kara Sea |
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Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
a period of periglacial conditions. Till of the last SIS, Bobrovo till, overlies glacial deposits from the previous Barents and Kara Sea ice sheets and marine deposits of the Last Interglacial. The till is identified by its contents of Scandinavian erratics and it has directional properties of westerly provenance. Above the deglaciation sediments, and extra marginally, it is replaced by glaciofluvial and glaciolacustrine deposits. At its maximum extent, the last SIS was more restricted in Russia than previously outlined and the time of termination at 1816 cal. kyr BP was almost 10 kyr delayed compared to the southwestern part of the ice sheet. We argue that the lithology of the ice sheets ’ substrate, and especially the location of former proglacial lake basins, influenced the dynamics of the ice sheet and guided the direction of flow. We advocate that, while reaching the maximum extent, lobe-shaped glaciers protruded eastward from SIS and moved along the path of water-filled lowland basins. Ice-sheet collapse and deglaciation in the region commenced when ice lobes were detached from the main ice sheet. During the Lateglacial warming, disintegration and melting took place in a 200600 km wide zone along the northeastern rim of SIS associated with thick Quaternary accumulations. Deglaciation occurred through aerial downwasting within large fields of dead ice developed during successively detached ice lobes. Deglaciation led to the development of hummocky moraine landscapes with scattered periglacial and ice-dammed lakes, while a sub- |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Igor N. Demidov Michael Houmark-nielsen Kurt H. Kjær Eiliv Larsen |
spellingShingle |
Igor N. Demidov Michael Houmark-nielsen Kurt H. Kjær Eiliv Larsen 2006: The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics |
author_facet |
Igor N. Demidov Michael Houmark-nielsen Kurt H. Kjær Eiliv Larsen |
author_sort |
Igor N. Demidov |
title |
2006: The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics |
title_short |
2006: The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics |
title_full |
2006: The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics |
title_fullStr |
2006: The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics |
title_full_unstemmed |
2006: The last Scandinavian Ice Sheet in northwestern Russia: ice flow patterns and decay dynamics |
title_sort |
2006: the last scandinavian ice sheet in northwestern russia: ice flow patterns and decay dynamics |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.4434 |
long_lat |
ENVELOPE(41.193,41.193,64.350,64.350) |
geographic |
Bobrovo Kara Sea |
geographic_facet |
Bobrovo Kara Sea |
genre |
Ice Sheet Kara Sea Sea ice |
genre_facet |
Ice Sheet Kara Sea Sea ice |
op_source |
https://notendur.hi.is/~oi/AG-326 2006 readings/Scandinavia and White Sea area/Demidov et al 2006.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.587.4434 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766030359101702144 |