Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica
Sedimentary sequences of the continental shelf of the eastern Amundsen Sea Embayment in West Antarctica represent records of past outlet glaciers and ice streams. The former flow of ice streams was channelled through glacial troughs, which now form large bathymetric depressions. We therefore selecte...
Published in: | Geological Society, London, Special Publications |
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2013
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Online Access: | https://epic.awi.de/id/eprint/30200/ http://sp.lyellcollection.org/content/381/1/233 https://hdl.handle.net/10013/epic.41866 |
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ftawi:oai:epic.awi.de:30200 2023-05-15T13:23:40+02:00 Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica Hochmuth, Katharina Gohl, Karsten Hambrey, M. J. Barker, P. F. Barrett, P. J. Bowman, V. Davies, B. Smellie, J. L. Tranter, M. 2013 https://epic.awi.de/id/eprint/30200/ http://sp.lyellcollection.org/content/381/1/233 https://hdl.handle.net/10013/epic.41866 unknown Geological Society of London Hochmuth, K. orcid:0000-0003-2789-2179 and Gohl, K. orcid:0000-0002-9558-2116 (2013) Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica / M. Hambrey , P. Barker , P. Barrett , V. Bowman , B. Davies , J. Smellie and M. Tranter (editors) , Geological Society, London, Special Publications 381, 381 , pp. 233-244 . doi:10.1144/SP381.21 <https://doi.org/10.1144/SP381.21> , hdl:10013/epic.41866 EPIC3Antarctic Palaeoenvironments and Earth-Surface Processes, Geological Society, London, Special Publications 381, London, Geological Society of London, 381, pp. 233-244, ISBN: 2041-4927 Article peerRev 2013 ftawi https://doi.org/10.1144/SP381.21 2021-12-24T15:37:38Z Sedimentary sequences of the continental shelf of the eastern Amundsen Sea Embayment in West Antarctica represent records of past outlet glaciers and ice streams. The former flow of ice streams was channelled through glacial troughs, which now form large bathymetric depressions. We therefore selected one of the largest troughs, the Abbot glacial trough in the outer shelf, to analyse its glacial depositional and erosional history, based on horizon-stratigraphy derived from seismic data. Several basement highs channellized the delivery of sediment and controlled the grounded ice sheet in early glacial periods. Both pre-glacial and full glacial seismic facies were identified. Glacially transported and deposited sediments extended the shelf break by 75 km from the pre-glacial shelf-edge. The main Abbot glacial trough contains sediment from confluent ice flows of the Pine Island/Thwaites, Cosgrove and Abbot Glacier systems, as well as smaller contributions from local ice streams emanating from Thurston Island. Sherman Island of Peacock Sound played an important role in the dynamics of the Abbot Glacier by dividing the ice flow into two ice streams, which interfered with the main glacial sediment transport paths from the south. This study contributes to an understanding of the formation of the Amundsen Sea shelf and the extent of past ice sheet advances. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Ice Sheet Pine Island Sherman Island Thurston Island West Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) West Antarctica Amundsen Sea Peacock ENVELOPE(169.450,169.450,-72.217,-72.217) Thurston ENVELOPE(-97.500,-97.500,-71.833,-71.833) Thurston Island ENVELOPE(-99.000,-99.000,-72.167,-72.167) Sherman Island ENVELOPE(-100.000,-100.000,-73.050,-73.050) Peacock Sound ENVELOPE(-102.000,-102.000,-72.500,-72.500) Geological Society, London, Special Publications 381 1 233 244 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Sedimentary sequences of the continental shelf of the eastern Amundsen Sea Embayment in West Antarctica represent records of past outlet glaciers and ice streams. The former flow of ice streams was channelled through glacial troughs, which now form large bathymetric depressions. We therefore selected one of the largest troughs, the Abbot glacial trough in the outer shelf, to analyse its glacial depositional and erosional history, based on horizon-stratigraphy derived from seismic data. Several basement highs channellized the delivery of sediment and controlled the grounded ice sheet in early glacial periods. Both pre-glacial and full glacial seismic facies were identified. Glacially transported and deposited sediments extended the shelf break by 75 km from the pre-glacial shelf-edge. The main Abbot glacial trough contains sediment from confluent ice flows of the Pine Island/Thwaites, Cosgrove and Abbot Glacier systems, as well as smaller contributions from local ice streams emanating from Thurston Island. Sherman Island of Peacock Sound played an important role in the dynamics of the Abbot Glacier by dividing the ice flow into two ice streams, which interfered with the main glacial sediment transport paths from the south. This study contributes to an understanding of the formation of the Amundsen Sea shelf and the extent of past ice sheet advances. |
author2 |
Hambrey, M. J. Barker, P. F. Barrett, P. J. Bowman, V. Davies, B. Smellie, J. L. Tranter, M. |
format |
Article in Journal/Newspaper |
author |
Hochmuth, Katharina Gohl, Karsten |
spellingShingle |
Hochmuth, Katharina Gohl, Karsten Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica |
author_facet |
Hochmuth, Katharina Gohl, Karsten |
author_sort |
Hochmuth, Katharina |
title |
Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica |
title_short |
Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica |
title_full |
Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica |
title_fullStr |
Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica |
title_full_unstemmed |
Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica |
title_sort |
glaciomarine sedimentation dynamics of the abbot glacial trough of the amundsen sea embayment shelf, west antarctica |
publisher |
Geological Society of London |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/30200/ http://sp.lyellcollection.org/content/381/1/233 https://hdl.handle.net/10013/epic.41866 |
long_lat |
ENVELOPE(169.450,169.450,-72.217,-72.217) ENVELOPE(-97.500,-97.500,-71.833,-71.833) ENVELOPE(-99.000,-99.000,-72.167,-72.167) ENVELOPE(-100.000,-100.000,-73.050,-73.050) ENVELOPE(-102.000,-102.000,-72.500,-72.500) |
geographic |
West Antarctica Amundsen Sea Peacock Thurston Thurston Island Sherman Island Peacock Sound |
geographic_facet |
West Antarctica Amundsen Sea Peacock Thurston Thurston Island Sherman Island Peacock Sound |
genre |
Amundsen Sea Antarc* Antarctica Ice Sheet Pine Island Sherman Island Thurston Island West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctica Ice Sheet Pine Island Sherman Island Thurston Island West Antarctica |
op_source |
EPIC3Antarctic Palaeoenvironments and Earth-Surface Processes, Geological Society, London, Special Publications 381, London, Geological Society of London, 381, pp. 233-244, ISBN: 2041-4927 |
op_relation |
Hochmuth, K. orcid:0000-0003-2789-2179 and Gohl, K. orcid:0000-0002-9558-2116 (2013) Glaciomarine sedimentation dynamics of the Abbot glacial trough of the Amundsen Sea Embayment shelf, West Antarctica / M. Hambrey , P. Barker , P. Barrett , V. Bowman , B. Davies , J. Smellie and M. Tranter (editors) , Geological Society, London, Special Publications 381, 381 , pp. 233-244 . doi:10.1144/SP381.21 <https://doi.org/10.1144/SP381.21> , hdl:10013/epic.41866 |
op_doi |
https://doi.org/10.1144/SP381.21 |
container_title |
Geological Society, London, Special Publications |
container_volume |
381 |
container_issue |
1 |
container_start_page |
233 |
op_container_end_page |
244 |
_version_ |
1766373868631490560 |