Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga
Lacustrine sedimentary records are valuable archives of regional paleoenvironmental and paleoclimatic changes. High-resolution seismic reflection data collected in 2013, in conjunction with data from sediment core Co1309, provide a detailed reconstruction of the preglacial and postglacial environmen...
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ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:59992 2023-05-15T16:40:27+02:00 Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga Lebas, E. Gromig, R. Krastel, S. Wagner, B. Fedorov, G. Goertz, C. Averes, T. Subetto, D. Naumenko, M. Melles, M. 2021 https://kups.ub.uni-koeln.de/59992/ eng eng PERGAMON-ELSEVIER SCIENCE LTD Lebas, E., Gromig, R., Krastel, S., Wagner, B., Fedorov, G., Goertz, C., Averes, T., Subetto, D., Naumenko, M. and Melles, M. (2021). Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga. Quat. Sci. Rev., 251. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-457X ddc:no doc-type:article publishedVersion 2021 ftubkoeln 2022-11-09T07:34:38Z Lacustrine sedimentary records are valuable archives of regional paleoenvironmental and paleoclimatic changes. High-resolution seismic reflection data collected in 2013, in conjunction with data from sediment core Co1309, provide a detailed reconstruction of the preglacial and postglacial environmental and sedimentological history of Lake Ladoga (NW Russia) during the late Quaternary. The exceptionally good quality of the seismic data reveals an up to 90-m-thick sedimentary infill in undisturbed places, containing four distinct sequences documented in unprecedented detail. The deepest sequence S1 most likely represents the bedrock of the lacustrine basin, which was reshaped during the subsequent glaciations. The overlying sequence S2 contains large-scale mounds of variable dimension, shape and internal architecture, which suggest a complex history of formation and deformation. We interpret these mounds as a moraine-mound complex resulting from thrusting and bulldozing processes of pre-existing, subglacial sediments during the overall retreat of the Scandinavian Ice Sheet following the Last Glacial Maximum. The finely-layered sequence S3 coincides with varved sediments in core Co1309 that mark the Scandinavian Ice Sheet deglaciation in the Ladoga basin. The youngest sequence S4, characterised by a semi-transparent facies in the acoustic data, coincides with lacustrine sediments in core Co1309 that were deposited during the Holocene. Our results also document major thoroughgoing fault systems in the northwestern part of the lake basin, along with unconformities related to lake-level fluctuations, notably in the eastern-, western- and southernmost regions. By coupling hydroacoustic and sedimentological data, we are able to pinpoint lateral variations and modifications of sedimentary inputs through time during the evolution of the Ladoga basin, along with unravelling the paleoenvironmental history of Lake Ladoga since the pre-LGM. (C) 2020 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Ice Sheet Cologne University: KUPS |
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Open Polar |
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Cologne University: KUPS |
op_collection_id |
ftubkoeln |
language |
English |
topic |
ddc:no |
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ddc:no Lebas, E. Gromig, R. Krastel, S. Wagner, B. Fedorov, G. Goertz, C. Averes, T. Subetto, D. Naumenko, M. Melles, M. Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga |
topic_facet |
ddc:no |
description |
Lacustrine sedimentary records are valuable archives of regional paleoenvironmental and paleoclimatic changes. High-resolution seismic reflection data collected in 2013, in conjunction with data from sediment core Co1309, provide a detailed reconstruction of the preglacial and postglacial environmental and sedimentological history of Lake Ladoga (NW Russia) during the late Quaternary. The exceptionally good quality of the seismic data reveals an up to 90-m-thick sedimentary infill in undisturbed places, containing four distinct sequences documented in unprecedented detail. The deepest sequence S1 most likely represents the bedrock of the lacustrine basin, which was reshaped during the subsequent glaciations. The overlying sequence S2 contains large-scale mounds of variable dimension, shape and internal architecture, which suggest a complex history of formation and deformation. We interpret these mounds as a moraine-mound complex resulting from thrusting and bulldozing processes of pre-existing, subglacial sediments during the overall retreat of the Scandinavian Ice Sheet following the Last Glacial Maximum. The finely-layered sequence S3 coincides with varved sediments in core Co1309 that mark the Scandinavian Ice Sheet deglaciation in the Ladoga basin. The youngest sequence S4, characterised by a semi-transparent facies in the acoustic data, coincides with lacustrine sediments in core Co1309 that were deposited during the Holocene. Our results also document major thoroughgoing fault systems in the northwestern part of the lake basin, along with unconformities related to lake-level fluctuations, notably in the eastern-, western- and southernmost regions. By coupling hydroacoustic and sedimentological data, we are able to pinpoint lateral variations and modifications of sedimentary inputs through time during the evolution of the Ladoga basin, along with unravelling the paleoenvironmental history of Lake Ladoga since the pre-LGM. (C) 2020 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Lebas, E. Gromig, R. Krastel, S. Wagner, B. Fedorov, G. Goertz, C. Averes, T. Subetto, D. Naumenko, M. Melles, M. |
author_facet |
Lebas, E. Gromig, R. Krastel, S. Wagner, B. Fedorov, G. Goertz, C. Averes, T. Subetto, D. Naumenko, M. Melles, M. |
author_sort |
Lebas, E. |
title |
Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga |
title_short |
Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga |
title_full |
Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga |
title_fullStr |
Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga |
title_full_unstemmed |
Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga |
title_sort |
pre-glacial and post-glacial history of the scandinavian ice sheet in nw russia - evidence from lake ladoga |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2021 |
url |
https://kups.ub.uni-koeln.de/59992/ |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Lebas, E., Gromig, R., Krastel, S., Wagner, B., Fedorov, G., Goertz, C., Averes, T., Subetto, D., Naumenko, M. and Melles, M. (2021). Pre-glacial and post-glacial history of the Scandinavian Ice Sheet in NW Russia - Evidence from Lake Ladoga. Quat. Sci. Rev., 251. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-457X |
_version_ |
1766030842565492736 |