An erosional origin for drumlins of NW Poland
Abstract Drumlins are landforms essential to understanding of ice sheet movement over soft beds, sediment transport along the ice/bed interface, and the formation of a wide range of glacial deposits. Although investigated more than any other glacial landform, the origin of drumlins remains contentio...
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crwiley:10.1002/esp.4630 2024-04-28T08:24:55+00:00 An erosional origin for drumlins of NW Poland Hermanowski, Piotr Piotrowski, Jan A. Szuman, Izabela Narodowe Centrum Nauki Det Frie Forskningsråd 2019 http://dx.doi.org/10.1002/esp.4630 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.4630 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/esp.4630 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 44, issue 10, page 2030-2050 ISSN 0197-9337 1096-9837 Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development journal-article 2019 crwiley https://doi.org/10.1002/esp.4630 2024-04-08T06:54:09Z Abstract Drumlins are landforms essential to understanding of ice sheet movement over soft beds, sediment transport along the ice/bed interface, and the formation of a wide range of glacial deposits. Although investigated more than any other glacial landform, the origin of drumlins remains contentious. Using high‐resolution LiDAR imagery and field data, we investigate the geomorphology and internal composition of one of the biggest drumlin fields in the North European Lowland. The Stargard drumlin field consists of over 1300 drumlins and related streamlined subglacial bedforms in a terminal part of a major Weichselian palaeo‐ice stream of the southern Scandinavian Ice Sheet. The drumlins are typically 600‐800 m long, 200‐250 m wide, 3‐6 m high and have axial elongation ratios ~2 but in some cases exceeding 15. Several subzones inferred from drumlin morphometry exist reflecting different ice flow dynamics. The most elongated drumlins occur in areas where ice moved down‐slope and where thick fine‐grained deposits of low hydraulic conductivity occur in the substratum. The largest portion of land occupied by drumlins and the greatest frequency density of drumlins occur where the ice moved up‐slope. Stargard drumlins are composed of a wide variety of glacial deposits including various types of tills and meltwater sediments, which range from undisturbed to heavily deformed. There is no correlation between the deposits in the drumlins and the drumlin forms indicating that the deposits pre‐date the drumlinizing process. It is suggested that the drumlin field was generated by a combination of direct glacial erosion and subglacial meltwater erosion by removing antecedent material from the inter‐drumlin areas and streamlining the resultant bumps. Our data support the search for a unifying theory of drumlin formation and suggest erosion as the most plausible single mechanism generating drumlin landscapes. © 2019 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice Sheet Wiley Online Library Earth Surface Processes and Landforms 44 10 2030 2050 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development |
spellingShingle |
Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development Hermanowski, Piotr Piotrowski, Jan A. Szuman, Izabela An erosional origin for drumlins of NW Poland |
topic_facet |
Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography, Planning and Development |
description |
Abstract Drumlins are landforms essential to understanding of ice sheet movement over soft beds, sediment transport along the ice/bed interface, and the formation of a wide range of glacial deposits. Although investigated more than any other glacial landform, the origin of drumlins remains contentious. Using high‐resolution LiDAR imagery and field data, we investigate the geomorphology and internal composition of one of the biggest drumlin fields in the North European Lowland. The Stargard drumlin field consists of over 1300 drumlins and related streamlined subglacial bedforms in a terminal part of a major Weichselian palaeo‐ice stream of the southern Scandinavian Ice Sheet. The drumlins are typically 600‐800 m long, 200‐250 m wide, 3‐6 m high and have axial elongation ratios ~2 but in some cases exceeding 15. Several subzones inferred from drumlin morphometry exist reflecting different ice flow dynamics. The most elongated drumlins occur in areas where ice moved down‐slope and where thick fine‐grained deposits of low hydraulic conductivity occur in the substratum. The largest portion of land occupied by drumlins and the greatest frequency density of drumlins occur where the ice moved up‐slope. Stargard drumlins are composed of a wide variety of glacial deposits including various types of tills and meltwater sediments, which range from undisturbed to heavily deformed. There is no correlation between the deposits in the drumlins and the drumlin forms indicating that the deposits pre‐date the drumlinizing process. It is suggested that the drumlin field was generated by a combination of direct glacial erosion and subglacial meltwater erosion by removing antecedent material from the inter‐drumlin areas and streamlining the resultant bumps. Our data support the search for a unifying theory of drumlin formation and suggest erosion as the most plausible single mechanism generating drumlin landscapes. © 2019 John Wiley & Sons, Ltd. |
author2 |
Narodowe Centrum Nauki Det Frie Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Hermanowski, Piotr Piotrowski, Jan A. Szuman, Izabela |
author_facet |
Hermanowski, Piotr Piotrowski, Jan A. Szuman, Izabela |
author_sort |
Hermanowski, Piotr |
title |
An erosional origin for drumlins of NW Poland |
title_short |
An erosional origin for drumlins of NW Poland |
title_full |
An erosional origin for drumlins of NW Poland |
title_fullStr |
An erosional origin for drumlins of NW Poland |
title_full_unstemmed |
An erosional origin for drumlins of NW Poland |
title_sort |
erosional origin for drumlins of nw poland |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/esp.4630 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.4630 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/esp.4630 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Earth Surface Processes and Landforms volume 44, issue 10, page 2030-2050 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.4630 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
44 |
container_issue |
10 |
container_start_page |
2030 |
op_container_end_page |
2050 |
_version_ |
1797584920380440576 |