Submarginal glaciotectonic deformation of Pleistocene permafrost
Recent advances in our understanding of glacier-permafrost interactions provide an alternative hypothesis to interpret Pleistocene glaciotectonic sequences in regions where permafrost no longer exists. Instead of necessarily forming under unfrozen subglacial conditions, some glaciotectonic sequences...
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ftunivsussexfig:oai:figshare.com:article/23320235 2023-06-18T03:41:05+02:00 Submarginal glaciotectonic deformation of Pleistocene permafrost R Waller Julian Murton C Whiteman 2008-01-01T00:00:00Z https://figshare.com/articles/chapter/Submarginal_glaciotectonic_deformation_of_Pleistocene_permafrost/23320235 unknown 10779/uos.23320235.v1 https://figshare.com/articles/chapter/Submarginal_glaciotectonic_deformation_of_Pleistocene_permafrost/23320235 Copyright not evaluated Uncategorised value Text Chapter 2008 ftunivsussexfig 2023-06-07T23:31:21Z Recent advances in our understanding of glacier-permafrost interactions provide an alternative hypothesis to interpret Pleistocene glaciotectonic sequences in regions where permafrost no longer exists. Instead of necessarily forming under unfrozen subglacial conditions, some glaciotectonic sequences may have formed by submarginal deformation of warm, partially-frozen permafrost. An example from North Norfolk, U.K., suggests that an ice sheet during Marine Isotope Stage 12 advanced across permafrost terrain, deforming it beneath the margin. Such a scenario can help explain some features whose formation under unfrozen conditions is problematic, including (1) the substantial thickness of the deforming layer and (2) the preservation of stratified intraclasts. Accordingly, glacial geologists should remain open to the possibility of glacier-permafrost interactions when interpreting glacigenic sequences. Such a re-interpretation could have major implications for reconstructing basal thermal regimes and modeling palaeo-ice sheets. Article in Journal/Newspaper Ice Ice Sheet permafrost University of Sussex: Figshare |
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University of Sussex: Figshare |
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Uncategorised value R Waller Julian Murton C Whiteman Submarginal glaciotectonic deformation of Pleistocene permafrost |
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Uncategorised value |
description |
Recent advances in our understanding of glacier-permafrost interactions provide an alternative hypothesis to interpret Pleistocene glaciotectonic sequences in regions where permafrost no longer exists. Instead of necessarily forming under unfrozen subglacial conditions, some glaciotectonic sequences may have formed by submarginal deformation of warm, partially-frozen permafrost. An example from North Norfolk, U.K., suggests that an ice sheet during Marine Isotope Stage 12 advanced across permafrost terrain, deforming it beneath the margin. Such a scenario can help explain some features whose formation under unfrozen conditions is problematic, including (1) the substantial thickness of the deforming layer and (2) the preservation of stratified intraclasts. Accordingly, glacial geologists should remain open to the possibility of glacier-permafrost interactions when interpreting glacigenic sequences. Such a re-interpretation could have major implications for reconstructing basal thermal regimes and modeling palaeo-ice sheets. |
format |
Article in Journal/Newspaper |
author |
R Waller Julian Murton C Whiteman |
author_facet |
R Waller Julian Murton C Whiteman |
author_sort |
R Waller |
title |
Submarginal glaciotectonic deformation of Pleistocene permafrost |
title_short |
Submarginal glaciotectonic deformation of Pleistocene permafrost |
title_full |
Submarginal glaciotectonic deformation of Pleistocene permafrost |
title_fullStr |
Submarginal glaciotectonic deformation of Pleistocene permafrost |
title_full_unstemmed |
Submarginal glaciotectonic deformation of Pleistocene permafrost |
title_sort |
submarginal glaciotectonic deformation of pleistocene permafrost |
publishDate |
2008 |
url |
https://figshare.com/articles/chapter/Submarginal_glaciotectonic_deformation_of_Pleistocene_permafrost/23320235 |
genre |
Ice Ice Sheet permafrost |
genre_facet |
Ice Ice Sheet permafrost |
op_relation |
10779/uos.23320235.v1 https://figshare.com/articles/chapter/Submarginal_glaciotectonic_deformation_of_Pleistocene_permafrost/23320235 |
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Copyright not evaluated |
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1769006503351549952 |