East Antarctic ice stream tributary underlain by major sedimentary basin
Marine and rift sediments exert a fundamental control on ice stream flow in the West Antarctic Ice Sheet, and hence on its mass balance and stability. In contrast, most ice streams in the much larger East Antarctic Ice Sheet are thought to be relatively stable features resting on till, perhaps under...
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Geological Society of America
2006
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Online Access: | http://nora.nerc.ac.uk/id/eprint/11/ |
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ftnerc:oai:nora.nerc.ac.uk:11 2024-02-11T09:57:48+01:00 East Antarctic ice stream tributary underlain by major sedimentary basin Bamber, Jonathan L. Ferraccioli, Fausto Joughin, Ian Shepherd, Tony Rippin, David M. Siegert, Martin J. Vaughan, David G. 2006 http://nora.nerc.ac.uk/id/eprint/11/ unknown Geological Society of America Bamber, Jonathan L.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Joughin, Ian; Shepherd, Tony; Rippin, David M.; Siegert, Martin J.; Vaughan, David G. orcid:0000-0002-9065-0570 . 2006 East Antarctic ice stream tributary underlain by major sedimentary basin. Geology, 34 (1). 33-36. https://doi.org/10.1130/G22160.1 <https://doi.org/10.1130/G22160.1> Glaciology Earth Sciences Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1130/G22160.1 2024-01-26T00:03:20Z Marine and rift sediments exert a fundamental control on ice stream flow in the West Antarctic Ice Sheet, and hence on its mass balance and stability. In contrast, most ice streams in the much larger East Antarctic Ice Sheet are thought to be relatively stable features resting on till, perhaps underlain by crystalline rock. Any geological controls on East Antarctic Ice Sheet enhanced flow remain largely unknown. We present aerogeophysical evidence indicating that a region of enhanced ice flow in the interior of the East Antarctic Ice Sheet is underlain by subglacial sediments 3 km thick and that these are influencing the flow regime of the overlying ice. We show that subglacial sediments are important in modulating ice dynamics, not just for the West Antarctic Ice Sheet, but also for its much larger neighbor, and suggest that the sedimentary basin identified here may contain information on the Neogene glacial history of this part of the East Antarctic Ice Sheet. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Natural Environment Research Council: NERC Open Research Archive Antarctic West Antarctic Ice Sheet East Antarctic Ice Sheet Geology 34 1 33 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Glaciology Earth Sciences |
spellingShingle |
Glaciology Earth Sciences Bamber, Jonathan L. Ferraccioli, Fausto Joughin, Ian Shepherd, Tony Rippin, David M. Siegert, Martin J. Vaughan, David G. East Antarctic ice stream tributary underlain by major sedimentary basin |
topic_facet |
Glaciology Earth Sciences |
description |
Marine and rift sediments exert a fundamental control on ice stream flow in the West Antarctic Ice Sheet, and hence on its mass balance and stability. In contrast, most ice streams in the much larger East Antarctic Ice Sheet are thought to be relatively stable features resting on till, perhaps underlain by crystalline rock. Any geological controls on East Antarctic Ice Sheet enhanced flow remain largely unknown. We present aerogeophysical evidence indicating that a region of enhanced ice flow in the interior of the East Antarctic Ice Sheet is underlain by subglacial sediments 3 km thick and that these are influencing the flow regime of the overlying ice. We show that subglacial sediments are important in modulating ice dynamics, not just for the West Antarctic Ice Sheet, but also for its much larger neighbor, and suggest that the sedimentary basin identified here may contain information on the Neogene glacial history of this part of the East Antarctic Ice Sheet. |
format |
Article in Journal/Newspaper |
author |
Bamber, Jonathan L. Ferraccioli, Fausto Joughin, Ian Shepherd, Tony Rippin, David M. Siegert, Martin J. Vaughan, David G. |
author_facet |
Bamber, Jonathan L. Ferraccioli, Fausto Joughin, Ian Shepherd, Tony Rippin, David M. Siegert, Martin J. Vaughan, David G. |
author_sort |
Bamber, Jonathan L. |
title |
East Antarctic ice stream tributary underlain by major sedimentary basin |
title_short |
East Antarctic ice stream tributary underlain by major sedimentary basin |
title_full |
East Antarctic ice stream tributary underlain by major sedimentary basin |
title_fullStr |
East Antarctic ice stream tributary underlain by major sedimentary basin |
title_full_unstemmed |
East Antarctic ice stream tributary underlain by major sedimentary basin |
title_sort |
east antarctic ice stream tributary underlain by major sedimentary basin |
publisher |
Geological Society of America |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/11/ |
geographic |
Antarctic West Antarctic Ice Sheet East Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet East Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
Bamber, Jonathan L.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Joughin, Ian; Shepherd, Tony; Rippin, David M.; Siegert, Martin J.; Vaughan, David G. orcid:0000-0002-9065-0570 . 2006 East Antarctic ice stream tributary underlain by major sedimentary basin. Geology, 34 (1). 33-36. https://doi.org/10.1130/G22160.1 <https://doi.org/10.1130/G22160.1> |
op_doi |
https://doi.org/10.1130/G22160.1 |
container_title |
Geology |
container_volume |
34 |
container_issue |
1 |
container_start_page |
33 |
_version_ |
1790593347440607232 |