A reinterpretation of glacial and marine limits around the northwestern Laurentide Ice Sheet
Seven new radiocarbon dates pertaining to deglaciation of northern Prince of Wales Island place the margin of the Laurentide Ice Sheet on the island by 11 000 BP. This requires a revision of the proposed age for the Viscount Melville Sound Ice Shelf of 10 300 – 9880 BP. A revised age of 11 300 – 11...
Published in: | Canadian Journal of Earth Sciences |
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Language: | English |
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/e87-058 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-058 |
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crcansciencepubl:10.1139/e87-058 2023-12-17T10:27:46+01:00 A reinterpretation of glacial and marine limits around the northwestern Laurentide Ice Sheet Dyke, Arthur S. 1987 http://dx.doi.org/10.1139/e87-058 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-058 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 24, issue 4, page 591-601 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1987 crcansciencepubl https://doi.org/10.1139/e87-058 2023-11-19T13:38:19Z Seven new radiocarbon dates pertaining to deglaciation of northern Prince of Wales Island place the margin of the Laurentide Ice Sheet on the island by 11 000 BP. This requires a revision of the proposed age for the Viscount Melville Sound Ice Shelf of 10 300 – 9880 BP. A revised age of 11 300 – 11 000 BP is suggested.The new dates also require revisions of the proposed Wisconsinan and Holocene history of Banks Island. Shells thought to have been thrust onshore to an elevation of 88 m by the ice shelf on northern Banks Island after 10 600 BP are reinterpreted as undisturbed postglacial marine shells recording a relative sea level of 88 m or more. This, in turn, suggests that the East Coast Sea and Jesse Till are of Late Wisconsinan rather than Early Wisconsinan age and that the Late Wisconsinan glacial limit on Banks Island as figured on the 1968 Glacial Map of Canada, rather than on recent revisions, is essentially correct. Article in Journal/Newspaper Banks Island Ice Sheet Ice Shelf Prince of Wales Island Viscount Melville Sound Canadian Science Publishing (via Crossref) Canada Prince of Wales Island ENVELOPE(-99.001,-99.001,72.668,72.668) Melville Sound ENVELOPE(-107.002,-107.002,68.168,68.168) Viscount Melville Sound ENVELOPE(-109.836,-109.836,74.046,74.046) Canadian Journal of Earth Sciences 24 4 591 601 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Dyke, Arthur S. A reinterpretation of glacial and marine limits around the northwestern Laurentide Ice Sheet |
topic_facet |
General Earth and Planetary Sciences |
description |
Seven new radiocarbon dates pertaining to deglaciation of northern Prince of Wales Island place the margin of the Laurentide Ice Sheet on the island by 11 000 BP. This requires a revision of the proposed age for the Viscount Melville Sound Ice Shelf of 10 300 – 9880 BP. A revised age of 11 300 – 11 000 BP is suggested.The new dates also require revisions of the proposed Wisconsinan and Holocene history of Banks Island. Shells thought to have been thrust onshore to an elevation of 88 m by the ice shelf on northern Banks Island after 10 600 BP are reinterpreted as undisturbed postglacial marine shells recording a relative sea level of 88 m or more. This, in turn, suggests that the East Coast Sea and Jesse Till are of Late Wisconsinan rather than Early Wisconsinan age and that the Late Wisconsinan glacial limit on Banks Island as figured on the 1968 Glacial Map of Canada, rather than on recent revisions, is essentially correct. |
format |
Article in Journal/Newspaper |
author |
Dyke, Arthur S. |
author_facet |
Dyke, Arthur S. |
author_sort |
Dyke, Arthur S. |
title |
A reinterpretation of glacial and marine limits around the northwestern Laurentide Ice Sheet |
title_short |
A reinterpretation of glacial and marine limits around the northwestern Laurentide Ice Sheet |
title_full |
A reinterpretation of glacial and marine limits around the northwestern Laurentide Ice Sheet |
title_fullStr |
A reinterpretation of glacial and marine limits around the northwestern Laurentide Ice Sheet |
title_full_unstemmed |
A reinterpretation of glacial and marine limits around the northwestern Laurentide Ice Sheet |
title_sort |
reinterpretation of glacial and marine limits around the northwestern laurentide ice sheet |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/e87-058 http://www.nrcresearchpress.com/doi/pdf/10.1139/e87-058 |
long_lat |
ENVELOPE(-99.001,-99.001,72.668,72.668) ENVELOPE(-107.002,-107.002,68.168,68.168) ENVELOPE(-109.836,-109.836,74.046,74.046) |
geographic |
Canada Prince of Wales Island Melville Sound Viscount Melville Sound |
geographic_facet |
Canada Prince of Wales Island Melville Sound Viscount Melville Sound |
genre |
Banks Island Ice Sheet Ice Shelf Prince of Wales Island Viscount Melville Sound |
genre_facet |
Banks Island Ice Sheet Ice Shelf Prince of Wales Island Viscount Melville Sound |
op_source |
Canadian Journal of Earth Sciences volume 24, issue 4, page 591-601 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e87-058 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
24 |
container_issue |
4 |
container_start_page |
591 |
op_container_end_page |
601 |
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1785579688506163200 |