Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany
Loading and unloading effects of the Scandinavian Ice Sheet triggered halotectonic movements in Northern Germany. We present newly detected geomorphological features—termed surface cracks—which indicate a relation between ice sheet-induced salt movement and surface processes. As a part of the Centra...
Published in: | Earth Surface Processes and Landforms |
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2021
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5008454 2023-05-15T16:37:35+02:00 Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany Hardt, J. Norden, B. Bauer, K. Tölle, O. Krambach, J. 2021 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008454 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008454_3/component/file_5008811/5008454.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.1002/esp.5226 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008454 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008454_3/component/file_5008811/5008454.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ CC-BY Earth Surface Processes and Landforms info:eu-repo/semantics/article 2021 ftgfzpotsdam https://doi.org/10.1002/esp.5226 2022-09-14T05:58:15Z Loading and unloading effects of the Scandinavian Ice Sheet triggered halotectonic movements in Northern Germany. We present newly detected geomorphological features—termed surface cracks—which indicate a relation between ice sheet-induced salt movement and surface processes. As a part of the Central European Basin System, numerous Zechstein salt structures are abundant in the North German Basin. On the basis of high-resolution digital terrain data, more than 160 surface cracks were mapped in Northern Germany, which were grouped into 30 clusters. Almost all of the surface cracks occur above the top regions of Zechstein salt structures. The surface cracks can be several kilometres long, up to more than 20 m deep and more than 100 m wide. The comparison of the shape of the salt structures and the orientation of the cracks reveals a geometric dependency, indicating that the cracks preferably occur near the crest margins of the salt structures. Furthermore, 3D seismic data from two sites show that subsurface faults originating from salt movement exist beneath the surface cracks. We interpret the cracks as surface ruptures due to ice sheet-induced halotectonic movements. The cracks occur in a variety of Quaternary sediments and landforms. This indicates that widespread halokinetic movements occurred in the region after the last (Weichselian) deglaciation and likely before the thawing of the permafrost, possibly in a time frame from c. 30–20 ka until c. 15 ka. Article in Journal/Newspaper Ice Ice Sheet permafrost GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Earth Surface Processes and Landforms 46 14 2963 2983 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
description |
Loading and unloading effects of the Scandinavian Ice Sheet triggered halotectonic movements in Northern Germany. We present newly detected geomorphological features—termed surface cracks—which indicate a relation between ice sheet-induced salt movement and surface processes. As a part of the Central European Basin System, numerous Zechstein salt structures are abundant in the North German Basin. On the basis of high-resolution digital terrain data, more than 160 surface cracks were mapped in Northern Germany, which were grouped into 30 clusters. Almost all of the surface cracks occur above the top regions of Zechstein salt structures. The surface cracks can be several kilometres long, up to more than 20 m deep and more than 100 m wide. The comparison of the shape of the salt structures and the orientation of the cracks reveals a geometric dependency, indicating that the cracks preferably occur near the crest margins of the salt structures. Furthermore, 3D seismic data from two sites show that subsurface faults originating from salt movement exist beneath the surface cracks. We interpret the cracks as surface ruptures due to ice sheet-induced halotectonic movements. The cracks occur in a variety of Quaternary sediments and landforms. This indicates that widespread halokinetic movements occurred in the region after the last (Weichselian) deglaciation and likely before the thawing of the permafrost, possibly in a time frame from c. 30–20 ka until c. 15 ka. |
format |
Article in Journal/Newspaper |
author |
Hardt, J. Norden, B. Bauer, K. Tölle, O. Krambach, J. |
spellingShingle |
Hardt, J. Norden, B. Bauer, K. Tölle, O. Krambach, J. Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany |
author_facet |
Hardt, J. Norden, B. Bauer, K. Tölle, O. Krambach, J. |
author_sort |
Hardt, J. |
title |
Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany |
title_short |
Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany |
title_full |
Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany |
title_fullStr |
Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany |
title_full_unstemmed |
Surface cracks—geomorphological indicators for late Quaternary halotectonic movements in Northern Germany |
title_sort |
surface cracks—geomorphological indicators for late quaternary halotectonic movements in northern germany |
publishDate |
2021 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008454 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008454_3/component/file_5008811/5008454.pdf |
genre |
Ice Ice Sheet permafrost |
genre_facet |
Ice Ice Sheet permafrost |
op_source |
Earth Surface Processes and Landforms |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/esp.5226 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008454 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008454_3/component/file_5008811/5008454.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/esp.5226 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
46 |
container_issue |
14 |
container_start_page |
2963 |
op_container_end_page |
2983 |
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1766027880265940992 |