Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula
A detailed record of late Pleistocene deglaciation followed by mid-Holocene ice shelf breakup and late Holocene re-growth is contained in continental shelf sediments in the northern Larsen area, northeast Antarctic Peninsula. The zero age of core tops is confirmed by new and published 210Pb profiles...
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ftnerc:oai:nora.nerc.ac.uk:104 2024-06-09T07:39:37+00:00 Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula Pudsey, Carol J. Murray, John W. Appleby, Peter Evans, Jeffrey 2006 http://nora.nerc.ac.uk/id/eprint/104/ https://doi.org/10.1016/j.quascirev.2006.01.029 unknown Elsevier Pudsey, Carol J.; Murray, John W.; Appleby, Peter; Evans, Jeffrey. 2006 Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula. Quaternary Science Reviews, 25 (17-18). 2357-2379. https://doi.org/10.1016/j.quascirev.2006.01.029 <https://doi.org/10.1016/j.quascirev.2006.01.029> Glaciology Earth Sciences Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1016/j.quascirev.2006.01.029 2024-05-15T08:39:04Z A detailed record of late Pleistocene deglaciation followed by mid-Holocene ice shelf breakup and late Holocene re-growth is contained in continental shelf sediments in the northern Larsen area, northeast Antarctic Peninsula. The zero age of core tops is confirmed by new and published 210Pb profiles, and 70 accelerator mass spectrometer (AMS) 14C dates on bulk organic carbon define sedimentation rates of 7.6–92 cm/ka. The varied geology in the local ice drainage basins facilitates the use of ice-rafted debris (IRD) provenance in determining the presence or absence of ice shelves. All inshore cores contain an interval of non-local IRD in the postglacial section, demonstrating widespread ice shelf breakup in the mid-Holocene. Both breakup and re-growth may have taken centuries and there are no widespread debris layers associated with breakup. Cores beyond and up to 30km inside the historical ice shelf limit exhibit a varied IRD provenance throughout the Holocene, suggesting the maximum ice shelf limit may date only from the Little Ice Age. Benthic foraminiferal assemblages are related to water masses and position on the continental shelf and have been modified by taphonomic processes. Nevertheless we discern a deglaciation signal in Prince Gustav Channel of a calcareous spike in predominantly agglutinated assemblages, and this is repeated at the time of mid-Holocene ice shelf breakup. The inferred mid-Holocene warm period occurred later in the northern Larsen area than on the west coast of the Antarctic Peninsula. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Prince Gustav Channel ENVELOPE(-58.250,-58.250,-63.833,-63.833) The Antarctic Quaternary Science Reviews 25 17-18 2357 2379 |
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 Pudsey, Carol J. Murray, John W. Appleby, Peter Evans, Jeffrey Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula |
topic_facet |
Glaciology Earth Sciences |
description |
A detailed record of late Pleistocene deglaciation followed by mid-Holocene ice shelf breakup and late Holocene re-growth is contained in continental shelf sediments in the northern Larsen area, northeast Antarctic Peninsula. The zero age of core tops is confirmed by new and published 210Pb profiles, and 70 accelerator mass spectrometer (AMS) 14C dates on bulk organic carbon define sedimentation rates of 7.6–92 cm/ka. The varied geology in the local ice drainage basins facilitates the use of ice-rafted debris (IRD) provenance in determining the presence or absence of ice shelves. All inshore cores contain an interval of non-local IRD in the postglacial section, demonstrating widespread ice shelf breakup in the mid-Holocene. Both breakup and re-growth may have taken centuries and there are no widespread debris layers associated with breakup. Cores beyond and up to 30km inside the historical ice shelf limit exhibit a varied IRD provenance throughout the Holocene, suggesting the maximum ice shelf limit may date only from the Little Ice Age. Benthic foraminiferal assemblages are related to water masses and position on the continental shelf and have been modified by taphonomic processes. Nevertheless we discern a deglaciation signal in Prince Gustav Channel of a calcareous spike in predominantly agglutinated assemblages, and this is repeated at the time of mid-Holocene ice shelf breakup. The inferred mid-Holocene warm period occurred later in the northern Larsen area than on the west coast of the Antarctic Peninsula. |
format |
Article in Journal/Newspaper |
author |
Pudsey, Carol J. Murray, John W. Appleby, Peter Evans, Jeffrey |
author_facet |
Pudsey, Carol J. Murray, John W. Appleby, Peter Evans, Jeffrey |
author_sort |
Pudsey, Carol J. |
title |
Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula |
title_short |
Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula |
title_full |
Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula |
title_fullStr |
Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula |
title_full_unstemmed |
Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula |
title_sort |
ice shelf history from petrographic and foraminiferal evidence, northeast antarctic peninsula |
publisher |
Elsevier |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/104/ https://doi.org/10.1016/j.quascirev.2006.01.029 |
long_lat |
ENVELOPE(-58.250,-58.250,-63.833,-63.833) |
geographic |
Antarctic Antarctic Peninsula Prince Gustav Channel The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Prince Gustav Channel The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Ice Shelves |
op_relation |
Pudsey, Carol J.; Murray, John W.; Appleby, Peter; Evans, Jeffrey. 2006 Ice shelf history from petrographic and foraminiferal evidence, northeast Antarctic Peninsula. Quaternary Science Reviews, 25 (17-18). 2357-2379. https://doi.org/10.1016/j.quascirev.2006.01.029 <https://doi.org/10.1016/j.quascirev.2006.01.029> |
op_doi |
https://doi.org/10.1016/j.quascirev.2006.01.029 |
container_title |
Quaternary Science Reviews |
container_volume |
25 |
container_issue |
17-18 |
container_start_page |
2357 |
op_container_end_page |
2379 |
_version_ |
1801380724870217728 |