Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay
The Ottawa Islands are in the northeastern part of Hudson Bay. Evidence from crossing striations suggests that the earliest recorded glacial movement was toward the northeast. With deglaciation of Hudson Strait and central Hudson Bay the ice movement shifted progressively in an anti-clockwise direct...
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1969
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Online Access: | http://dx.doi.org/10.1139/e69-126 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-126 |
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crcansciencepubl:10.1139/e69-126 2023-12-17T10:27:36+01:00 Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay Andrews, J. T. Falconer, G. 1969 http://dx.doi.org/10.1139/e69-126 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-126 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 6, issue 5, page 1263-1276 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1969 crcansciencepubl https://doi.org/10.1139/e69-126 2023-11-19T13:39:35Z The Ottawa Islands are in the northeastern part of Hudson Bay. Evidence from crossing striations suggests that the earliest recorded glacial movement was toward the northeast. With deglaciation of Hudson Strait and central Hudson Bay the ice movement shifted progressively in an anti-clockwise direction, with the final movement being toward the west–southwest. The islands were deglaciated between 7610 and 7250 radiocarbon years ago. The marine limit is 158 m above sea level. Deltaic deposits below the marine limit are grouped into sets that correlate with glacial advances in Labrador–Ungava and Baffin Island, and with palynological results from Keewatin, suggesting that they reflect climatically induced processes rather than a balance in eustatic–isostatic movements. Radiocarbon dates on marine molluscs enable postglacial uplift and emergence curves to be drawn, which agree closely with predicted curves. Rates of uplift were about 0.06 m yr −1 at 6500 yr B.P., whereas the present rate is about 0.008 m yr −1 . The deglaciation of Hudson Bay was marked by the splitting of the ice sheet along the submarine deep that trends southward between Mansel and Coats islands toward the southwest coast of the bay. Article in Journal/Newspaper Baffin Island Baffin Hudson Bay Hudson Strait Ice Sheet Keewatin Northwest Territories Ottawa Islands Canadian Science Publishing (via Crossref) Northwest Territories Hudson Bay Baffin Island Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Ottawa Islands ENVELOPE(-80.266,-80.266,59.584,59.584) Canadian Journal of Earth Sciences 6 5 1263 1276 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Andrews, J. T. Falconer, G. Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay |
topic_facet |
General Earth and Planetary Sciences |
description |
The Ottawa Islands are in the northeastern part of Hudson Bay. Evidence from crossing striations suggests that the earliest recorded glacial movement was toward the northeast. With deglaciation of Hudson Strait and central Hudson Bay the ice movement shifted progressively in an anti-clockwise direction, with the final movement being toward the west–southwest. The islands were deglaciated between 7610 and 7250 radiocarbon years ago. The marine limit is 158 m above sea level. Deltaic deposits below the marine limit are grouped into sets that correlate with glacial advances in Labrador–Ungava and Baffin Island, and with palynological results from Keewatin, suggesting that they reflect climatically induced processes rather than a balance in eustatic–isostatic movements. Radiocarbon dates on marine molluscs enable postglacial uplift and emergence curves to be drawn, which agree closely with predicted curves. Rates of uplift were about 0.06 m yr −1 at 6500 yr B.P., whereas the present rate is about 0.008 m yr −1 . The deglaciation of Hudson Bay was marked by the splitting of the ice sheet along the submarine deep that trends southward between Mansel and Coats islands toward the southwest coast of the bay. |
format |
Article in Journal/Newspaper |
author |
Andrews, J. T. Falconer, G. |
author_facet |
Andrews, J. T. Falconer, G. |
author_sort |
Andrews, J. T. |
title |
Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay |
title_short |
Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay |
title_full |
Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay |
title_fullStr |
Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay |
title_full_unstemmed |
Late glacial and post-glacial history and emergence of the Ottawa Islands, Hudson Bay, Northwest Territories: Evidence on the deglaciation of Hudson Bay |
title_sort |
late glacial and post-glacial history and emergence of the ottawa islands, hudson bay, northwest territories: evidence on the deglaciation of hudson bay |
publisher |
Canadian Science Publishing |
publishDate |
1969 |
url |
http://dx.doi.org/10.1139/e69-126 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-126 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) ENVELOPE(-80.266,-80.266,59.584,59.584) |
geographic |
Northwest Territories Hudson Bay Baffin Island Hudson Hudson Strait Ottawa Islands |
geographic_facet |
Northwest Territories Hudson Bay Baffin Island Hudson Hudson Strait Ottawa Islands |
genre |
Baffin Island Baffin Hudson Bay Hudson Strait Ice Sheet Keewatin Northwest Territories Ottawa Islands |
genre_facet |
Baffin Island Baffin Hudson Bay Hudson Strait Ice Sheet Keewatin Northwest Territories Ottawa Islands |
op_source |
Canadian Journal of Earth Sciences volume 6, issue 5, page 1263-1276 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e69-126 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
6 |
container_issue |
5 |
container_start_page |
1263 |
op_container_end_page |
1276 |
_version_ |
1785579485457809408 |