Mega‐scale glacial lineations and cross‐cutting ice‐flow landforms
Abstract Landsat images reveal a previously unsuspected large‐scale pattern of streamlining within drift that is assumed to reflect former phases of ice flow. Such a glacial grain can be regarded as a landform assemblage comprised of a number of components. Drumlins and megaflutes form part of the p...
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crwiley:10.1002/esp.3290180102 2024-09-09T19:45:18+00:00 Mega‐scale glacial lineations and cross‐cutting ice‐flow landforms Clark, Chris D. 1993 http://dx.doi.org/10.1002/esp.3290180102 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.3290180102 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.3290180102 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 18, issue 1, page 1-29 ISSN 0197-9337 1096-9837 journal-article 1993 crwiley https://doi.org/10.1002/esp.3290180102 2024-08-01T04:22:38Z Abstract Landsat images reveal a previously unsuspected large‐scale pattern of streamlining within drift that is assumed to reflect former phases of ice flow. Such a glacial grain can be regarded as a landform assemblage comprised of a number of components. Drumlins and megaflutes form part of the pattern, but in addition there are two previously undocumented ice‐moulded landform elements: streamlined lineations of much greater proportions, referred to as mega‐scale glacial lineations, and a distinctive cross‐cutting topology within the grain. The ice‐moulded landform assemblage is described and illustrated with reference to examples from Canada. Possible modes of genesis of such landforms are discussed and their glaciological implications outlined. The discovery of this pattern indicates the pervasive nature of subglacial deformation of sediment, and demands a radical re‐interpretation of ice sheet dynamics. Article in Journal/Newspaper Ice Sheet Wiley Online Library Canada Earth Surface Processes and Landforms 18 1 1 29 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Landsat images reveal a previously unsuspected large‐scale pattern of streamlining within drift that is assumed to reflect former phases of ice flow. Such a glacial grain can be regarded as a landform assemblage comprised of a number of components. Drumlins and megaflutes form part of the pattern, but in addition there are two previously undocumented ice‐moulded landform elements: streamlined lineations of much greater proportions, referred to as mega‐scale glacial lineations, and a distinctive cross‐cutting topology within the grain. The ice‐moulded landform assemblage is described and illustrated with reference to examples from Canada. Possible modes of genesis of such landforms are discussed and their glaciological implications outlined. The discovery of this pattern indicates the pervasive nature of subglacial deformation of sediment, and demands a radical re‐interpretation of ice sheet dynamics. |
format |
Article in Journal/Newspaper |
author |
Clark, Chris D. |
spellingShingle |
Clark, Chris D. Mega‐scale glacial lineations and cross‐cutting ice‐flow landforms |
author_facet |
Clark, Chris D. |
author_sort |
Clark, Chris D. |
title |
Mega‐scale glacial lineations and cross‐cutting ice‐flow landforms |
title_short |
Mega‐scale glacial lineations and cross‐cutting ice‐flow landforms |
title_full |
Mega‐scale glacial lineations and cross‐cutting ice‐flow landforms |
title_fullStr |
Mega‐scale glacial lineations and cross‐cutting ice‐flow landforms |
title_full_unstemmed |
Mega‐scale glacial lineations and cross‐cutting ice‐flow landforms |
title_sort |
mega‐scale glacial lineations and cross‐cutting ice‐flow landforms |
publisher |
Wiley |
publishDate |
1993 |
url |
http://dx.doi.org/10.1002/esp.3290180102 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.3290180102 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.3290180102 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Earth Surface Processes and Landforms volume 18, issue 1, page 1-29 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.3290180102 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
18 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
29 |
_version_ |
1809914919744700416 |