The origin of deformation structures in periglacial fluvial sediments of the Wisłok Valley, southeast Poland
Numerous deformation structures of various shapes and internal structures (drop‐like and pocket‐like structures, folds, streaks and diapirs) are present in the Weichselian alluvial terrace sands and loams of the Wisłok river (Sandomierz Basin, southeast Poland). A detailed study of the structures le...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.691 |
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ftrepec:oai:RePEc:wly:perpro:v:21:y:2010:i:4:p:301-314 2023-05-15T16:26:31+02:00 The origin of deformation structures in periglacial fluvial sediments of the Wisłok Valley, southeast Poland J. Superson P. Gębica T. Brzezińska‐Wójcik https://doi.org/10.1002/ppp.691 unknown https://doi.org/10.1002/ppp.691 article ftrepec https://doi.org/10.1002/ppp.691 2020-12-04T13:31:25Z Numerous deformation structures of various shapes and internal structures (drop‐like and pocket‐like structures, folds, streaks and diapirs) are present in the Weichselian alluvial terrace sands and loams of the Wisłok river (Sandomierz Basin, southeast Poland). A detailed study of the structures leads to the conclusion that they originated from cryostatic pressure, gravitational loading of sediments with reversed density gradient and thermokarst. Under cryostatic pressure, irregular structures formed in channel sands and gravels and wide folds occurred in clayey organic loams during the Greenland Stadial 2 when permafrost expanded. The variable forms and complex structure record the progress of downward displacement interrupted at various stages by water escape. Small sandy load casts and folds in the lower and middle parts of flood rhythmite also formed during the Greenland Stadial 2 when permafrost stabilised. Large deformation structures in the topmost rhythmite layers formed under the weight of overlying channel deposits during the Greenland Interstadial 1 as permafrost degraded. Copyright © 2010 John Wiley & Sons, Ltd. Article in Journal/Newspaper Greenland permafrost Thermokarst RePEc (Research Papers in Economics) Greenland Permafrost and Periglacial Processes 21 4 301 314 |
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Open Polar |
collection |
RePEc (Research Papers in Economics) |
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ftrepec |
language |
unknown |
description |
Numerous deformation structures of various shapes and internal structures (drop‐like and pocket‐like structures, folds, streaks and diapirs) are present in the Weichselian alluvial terrace sands and loams of the Wisłok river (Sandomierz Basin, southeast Poland). A detailed study of the structures leads to the conclusion that they originated from cryostatic pressure, gravitational loading of sediments with reversed density gradient and thermokarst. Under cryostatic pressure, irregular structures formed in channel sands and gravels and wide folds occurred in clayey organic loams during the Greenland Stadial 2 when permafrost expanded. The variable forms and complex structure record the progress of downward displacement interrupted at various stages by water escape. Small sandy load casts and folds in the lower and middle parts of flood rhythmite also formed during the Greenland Stadial 2 when permafrost stabilised. Large deformation structures in the topmost rhythmite layers formed under the weight of overlying channel deposits during the Greenland Interstadial 1 as permafrost degraded. Copyright © 2010 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
J. Superson P. Gębica T. Brzezińska‐Wójcik |
spellingShingle |
J. Superson P. Gębica T. Brzezińska‐Wójcik The origin of deformation structures in periglacial fluvial sediments of the Wisłok Valley, southeast Poland |
author_facet |
J. Superson P. Gębica T. Brzezińska‐Wójcik |
author_sort |
J. Superson |
title |
The origin of deformation structures in periglacial fluvial sediments of the Wisłok Valley, southeast Poland |
title_short |
The origin of deformation structures in periglacial fluvial sediments of the Wisłok Valley, southeast Poland |
title_full |
The origin of deformation structures in periglacial fluvial sediments of the Wisłok Valley, southeast Poland |
title_fullStr |
The origin of deformation structures in periglacial fluvial sediments of the Wisłok Valley, southeast Poland |
title_full_unstemmed |
The origin of deformation structures in periglacial fluvial sediments of the Wisłok Valley, southeast Poland |
title_sort |
origin of deformation structures in periglacial fluvial sediments of the wisłok valley, southeast poland |
url |
https://doi.org/10.1002/ppp.691 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland permafrost Thermokarst |
genre_facet |
Greenland permafrost Thermokarst |
op_relation |
https://doi.org/10.1002/ppp.691 |
op_doi |
https://doi.org/10.1002/ppp.691 |
container_title |
Permafrost and Periglacial Processes |
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21 |
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4 |
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301 |
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314 |
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1766015445706473472 |