Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland
Involutions and small frost fissures have been recorded over a wide area of the lower terrace of the Warta River valley (central Poland). They developed at the lithological boundary between an organic‐rich deposit with a thin peat layer (unit b) and an underlying fluvial sandy deposit (unit a). Most...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.1956 |
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ftrepec:oai:RePEc:wly:perpro:v:28:y:2017:i:4:p:726-740 2023-05-15T17:57:16+02:00 Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland Joanna Petera‐Zganiacz Danuta A. Dzieduszyńska https://doi.org/10.1002/ppp.1956 unknown https://doi.org/10.1002/ppp.1956 article ftrepec https://doi.org/10.1002/ppp.1956 2020-12-04T13:31:25Z Involutions and small frost fissures have been recorded over a wide area of the lower terrace of the Warta River valley (central Poland). They developed at the lithological boundary between an organic‐rich deposit with a thin peat layer (unit b) and an underlying fluvial sandy deposit (unit a). Most of the involutions are products of a reversed density gradient and loading, or developed under the influence of cryohydrostatic pressure. Among them are drop‐like and flat‐bottomed structures, diapirs, flame‐like and fold structures and irregular involutions. Some frost fissures have also been recorded in the same stratigraphic position. The sedimentological properties and formative mechanism of the involutions, together with environmental data (lithology, groundwater conditions, snow cover and vegetation), reveal their origin as periglacial. Radiocarbon dating indicates that the structures formed during the Younger Dryas. Overall, the involutions and frost fissures indicate that permafrost re‐aggraded in this region of central Poland during the Younger Dryas. Copyright © 2017 John Wiley & Sons, Ltd. Article in Journal/Newspaper permafrost RePEc (Research Papers in Economics) Permafrost and Periglacial Processes 28 4 726 740 |
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Open Polar |
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RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
Involutions and small frost fissures have been recorded over a wide area of the lower terrace of the Warta River valley (central Poland). They developed at the lithological boundary between an organic‐rich deposit with a thin peat layer (unit b) and an underlying fluvial sandy deposit (unit a). Most of the involutions are products of a reversed density gradient and loading, or developed under the influence of cryohydrostatic pressure. Among them are drop‐like and flat‐bottomed structures, diapirs, flame‐like and fold structures and irregular involutions. Some frost fissures have also been recorded in the same stratigraphic position. The sedimentological properties and formative mechanism of the involutions, together with environmental data (lithology, groundwater conditions, snow cover and vegetation), reveal their origin as periglacial. Radiocarbon dating indicates that the structures formed during the Younger Dryas. Overall, the involutions and frost fissures indicate that permafrost re‐aggraded in this region of central Poland during the Younger Dryas. Copyright © 2017 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Joanna Petera‐Zganiacz Danuta A. Dzieduszyńska |
spellingShingle |
Joanna Petera‐Zganiacz Danuta A. Dzieduszyńska Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland |
author_facet |
Joanna Petera‐Zganiacz Danuta A. Dzieduszyńska |
author_sort |
Joanna Petera‐Zganiacz |
title |
Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland |
title_short |
Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland |
title_full |
Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland |
title_fullStr |
Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland |
title_full_unstemmed |
Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland |
title_sort |
palaeoenvironmental proxies for permafrost presence during the younger dryas, central poland |
url |
https://doi.org/10.1002/ppp.1956 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
https://doi.org/10.1002/ppp.1956 |
op_doi |
https://doi.org/10.1002/ppp.1956 |
container_title |
Permafrost and Periglacial Processes |
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28 |
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4 |
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726 |
op_container_end_page |
740 |
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1766165662361714688 |