Drumlin Formation Time: Evidence from Nothern and Central Sweden
Large-scale drumlins occur abundantly throughout central and northern Sweden. Whereas many drumlins in the north are an integral part of a relict glacial landscape > 100,000 years old, those to the south are generally interpreted as of last deglaciation age. Typically, the latter ones have not be...
Published in: | Geografiska Annaler: Series A, Physical Geography |
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Online Access: | http://hdl.handle.net/1885/80304 https://doi.org/10.1111/j.0435-3676.2004.00221.x |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/80304 2024-01-14T10:07:44+01:00 Drumlin Formation Time: Evidence from Nothern and Central Sweden Hattestrand, Clas Gotz, Svea Naslund, Jens-Ove Fabel, Frederick Stroeven, Arjen http://hdl.handle.net/1885/80304 https://doi.org/10.1111/j.0435-3676.2004.00221.x unknown Blackwell Publishing Ltd 0435-3676 http://hdl.handle.net/1885/80304 doi:10.1111/j.0435-3676.2004.00221.x Geografiska Annaler Keywords: drumlin glacial landform last deglaciation numerical model Quaternary Eurasia Europe Northern Europe Scandinavia Sweden Drumlins Ice sheet Sweden Journal article ftanucanberra https://doi.org/10.1111/j.0435-3676.2004.00221.x 2023-12-15T09:36:22Z Large-scale drumlins occur abundantly throughout central and northern Sweden. Whereas many drumlins in the north are an integral part of a relict glacial landscape > 100,000 years old, those to the south are generally interpreted as of last deglaciation age. Typically, the latter ones have not been overprinted by younger glacial landforms. Despite this apparent difference in formation history, drumlins in both regions have similar directional and morphological characteristics. A systematic analysis of >3000 drumlins in (i) areas within relief landscapes, (ii) areas with an ambiguous deglaciation age assignment, and (iii) areas within deglacial landscapes, indicates that these latter deglaciation drumlins differ clearly in both shape and size from drumlins in the other two types of landscapes. In addition, numerical modelling indicates that basal melting conditions, a prerequisite for drumlin formation, prevailed only for a very limited time over much of northern Sweden during the last deglaciation, but lasted for longer periods of time during earlier stages of the Weichselian. A reconnaissance radionuclide bedrock exposure date from the crag of a large drumlin in the relict landscape indicates that glacial erosion, and presumably drumlin formation, at this location predated Marine Isotope Stage 7. We conclude, therefore, that the large-scale drumlins of central and northern Sweden did not form during the last deglaciation, or during any other specific ice flow event. Instead, we suggest that they were formed by successive phases of erosion and deposition by ice sheets of similar magnitude and configuration. Article in Journal/Newspaper Ice Sheet Northern Sweden Australian National University: ANU Digital Collections Geografiska Annaler: Series A, Physical Geography 86 2 155 167 |
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Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
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unknown |
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Keywords: drumlin glacial landform last deglaciation numerical model Quaternary Eurasia Europe Northern Europe Scandinavia Sweden Drumlins Ice sheet Sweden |
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Keywords: drumlin glacial landform last deglaciation numerical model Quaternary Eurasia Europe Northern Europe Scandinavia Sweden Drumlins Ice sheet Sweden Hattestrand, Clas Gotz, Svea Naslund, Jens-Ove Fabel, Frederick Stroeven, Arjen Drumlin Formation Time: Evidence from Nothern and Central Sweden |
topic_facet |
Keywords: drumlin glacial landform last deglaciation numerical model Quaternary Eurasia Europe Northern Europe Scandinavia Sweden Drumlins Ice sheet Sweden |
description |
Large-scale drumlins occur abundantly throughout central and northern Sweden. Whereas many drumlins in the north are an integral part of a relict glacial landscape > 100,000 years old, those to the south are generally interpreted as of last deglaciation age. Typically, the latter ones have not been overprinted by younger glacial landforms. Despite this apparent difference in formation history, drumlins in both regions have similar directional and morphological characteristics. A systematic analysis of >3000 drumlins in (i) areas within relief landscapes, (ii) areas with an ambiguous deglaciation age assignment, and (iii) areas within deglacial landscapes, indicates that these latter deglaciation drumlins differ clearly in both shape and size from drumlins in the other two types of landscapes. In addition, numerical modelling indicates that basal melting conditions, a prerequisite for drumlin formation, prevailed only for a very limited time over much of northern Sweden during the last deglaciation, but lasted for longer periods of time during earlier stages of the Weichselian. A reconnaissance radionuclide bedrock exposure date from the crag of a large drumlin in the relict landscape indicates that glacial erosion, and presumably drumlin formation, at this location predated Marine Isotope Stage 7. We conclude, therefore, that the large-scale drumlins of central and northern Sweden did not form during the last deglaciation, or during any other specific ice flow event. Instead, we suggest that they were formed by successive phases of erosion and deposition by ice sheets of similar magnitude and configuration. |
format |
Article in Journal/Newspaper |
author |
Hattestrand, Clas Gotz, Svea Naslund, Jens-Ove Fabel, Frederick Stroeven, Arjen |
author_facet |
Hattestrand, Clas Gotz, Svea Naslund, Jens-Ove Fabel, Frederick Stroeven, Arjen |
author_sort |
Hattestrand, Clas |
title |
Drumlin Formation Time: Evidence from Nothern and Central Sweden |
title_short |
Drumlin Formation Time: Evidence from Nothern and Central Sweden |
title_full |
Drumlin Formation Time: Evidence from Nothern and Central Sweden |
title_fullStr |
Drumlin Formation Time: Evidence from Nothern and Central Sweden |
title_full_unstemmed |
Drumlin Formation Time: Evidence from Nothern and Central Sweden |
title_sort |
drumlin formation time: evidence from nothern and central sweden |
publisher |
Blackwell Publishing Ltd |
url |
http://hdl.handle.net/1885/80304 https://doi.org/10.1111/j.0435-3676.2004.00221.x |
genre |
Ice Sheet Northern Sweden |
genre_facet |
Ice Sheet Northern Sweden |
op_source |
Geografiska Annaler |
op_relation |
0435-3676 http://hdl.handle.net/1885/80304 doi:10.1111/j.0435-3676.2004.00221.x |
op_doi |
https://doi.org/10.1111/j.0435-3676.2004.00221.x |
container_title |
Geografiska Annaler: Series A, Physical Geography |
container_volume |
86 |
container_issue |
2 |
container_start_page |
155 |
op_container_end_page |
167 |
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1788062138883899392 |