The Maximum Ice Extent on Island Groups in the Scotia Sea, Antarctica
Evidence is presented for a more extensive ice cover over South Georgia, the South Orkney Islands, the South Shetland Islands, and the tip of the Antarctic Peninsula. Ice extended across the adjacent submarine shelves to a depth of 200 m below present sea level. Troughs cut into the submarine shelve...
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Cambridge University Press (CUP)
1977
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Online Access: | http://dx.doi.org/10.1016/0033-5894(77)90041-2 http://api.elsevier.com/content/article/PII:0033589477900412?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589477900412?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400031884 |
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crcambridgeupr:10.1016/0033-5894(77)90041-2 2024-06-09T07:39:22+00:00 The Maximum Ice Extent on Island Groups in the Scotia Sea, Antarctica Sugden, D.E. Clapperton, C.M. 1977 http://dx.doi.org/10.1016/0033-5894(77)90041-2 http://api.elsevier.com/content/article/PII:0033589477900412?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589477900412?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400031884 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 7, issue 2, page 268-282 ISSN 0033-5894 1096-0287 journal-article 1977 crcambridgeupr https://doi.org/10.1016/0033-5894(77)90041-2 2024-05-15T13:14:44Z Evidence is presented for a more extensive ice cover over South Georgia, the South Orkney Islands, the South Shetland Islands, and the tip of the Antarctic Peninsula. Ice extended across the adjacent submarine shelves to a depth of 200 m below present sea level. Troughs cut into the submarine shelves by ice streams or outlet glaciers and ice-scoured features on the shelf areas suggest that the ice caps were warm-based. The South Shetland Islands appear not to have been overrun by continental ice. Geomorphological evidence in two island groups suggests that the maximum ice cover, which was responsible for the bulk of glacial erosion, predates at least one full glaciation. Subsequently there was a marine interval and then a glaciation which overran all of the lowlying peninsulas. The Falkland Islands, only 2° of latitude north of South Georgia, were never covered by an ice cap and supported only a few slightly enlarged cirque glaciers. This suggests that the major oceanographic and atmospheric boundary represented by the Antarctic Convergence, which is presently situated between the Falkland Islands and South Georgia, has remained in a similar position throughout the glacial age. Its position is probably bathymetrically controlled. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice cap Scotia Sea South Orkney Islands South Shetland Islands Cambridge University Press Antarctic Antarctic Peninsula Scotia Sea South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) South Shetland Islands The Antarctic Quaternary Research 7 2 268 282 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Evidence is presented for a more extensive ice cover over South Georgia, the South Orkney Islands, the South Shetland Islands, and the tip of the Antarctic Peninsula. Ice extended across the adjacent submarine shelves to a depth of 200 m below present sea level. Troughs cut into the submarine shelves by ice streams or outlet glaciers and ice-scoured features on the shelf areas suggest that the ice caps were warm-based. The South Shetland Islands appear not to have been overrun by continental ice. Geomorphological evidence in two island groups suggests that the maximum ice cover, which was responsible for the bulk of glacial erosion, predates at least one full glaciation. Subsequently there was a marine interval and then a glaciation which overran all of the lowlying peninsulas. The Falkland Islands, only 2° of latitude north of South Georgia, were never covered by an ice cap and supported only a few slightly enlarged cirque glaciers. This suggests that the major oceanographic and atmospheric boundary represented by the Antarctic Convergence, which is presently situated between the Falkland Islands and South Georgia, has remained in a similar position throughout the glacial age. Its position is probably bathymetrically controlled. |
format |
Article in Journal/Newspaper |
author |
Sugden, D.E. Clapperton, C.M. |
spellingShingle |
Sugden, D.E. Clapperton, C.M. The Maximum Ice Extent on Island Groups in the Scotia Sea, Antarctica |
author_facet |
Sugden, D.E. Clapperton, C.M. |
author_sort |
Sugden, D.E. |
title |
The Maximum Ice Extent on Island Groups in the Scotia Sea, Antarctica |
title_short |
The Maximum Ice Extent on Island Groups in the Scotia Sea, Antarctica |
title_full |
The Maximum Ice Extent on Island Groups in the Scotia Sea, Antarctica |
title_fullStr |
The Maximum Ice Extent on Island Groups in the Scotia Sea, Antarctica |
title_full_unstemmed |
The Maximum Ice Extent on Island Groups in the Scotia Sea, Antarctica |
title_sort |
maximum ice extent on island groups in the scotia sea, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1977 |
url |
http://dx.doi.org/10.1016/0033-5894(77)90041-2 http://api.elsevier.com/content/article/PII:0033589477900412?httpAccept=text/xml http://api.elsevier.com/content/article/PII:0033589477900412?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400031884 |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Antarctic Peninsula Scotia Sea South Orkney Islands South Shetland Islands The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Scotia Sea South Orkney Islands South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice cap Scotia Sea South Orkney Islands South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice cap Scotia Sea South Orkney Islands South Shetland Islands |
op_source |
Quaternary Research volume 7, issue 2, page 268-282 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/0033-5894(77)90041-2 |
container_title |
Quaternary Research |
container_volume |
7 |
container_issue |
2 |
container_start_page |
268 |
op_container_end_page |
282 |
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1801379074491285504 |