Late Cenozoic paleomagnetic record of Duck Hawk Bluffs, Banks Island, Canadian Arctic Archipelago
Detailed paleomagnetic investigations have been completed on unconsolidated sediments from Duck Hawk Bluffs on Banks Island, in the Canadian Arctic Archipelago, that record some of the oldest late Cenozoic glacial and nonglacial events in Canada. The preglacial Worth Point Formation, the overlying D...
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1990
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crcansciencepubl:10.1139/e90-010 2023-12-17T10:23:37+01:00 Late Cenozoic paleomagnetic record of Duck Hawk Bluffs, Banks Island, Canadian Arctic Archipelago Barendregt, R. W. Vincent, Jean-Serge 1990 http://dx.doi.org/10.1139/e90-010 http://www.nrcresearchpress.com/doi/pdf/10.1139/e90-010 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 27, issue 1, page 124-130 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1990 crcansciencepubl https://doi.org/10.1139/e90-010 2023-11-19T13:39:07Z Detailed paleomagnetic investigations have been completed on unconsolidated sediments from Duck Hawk Bluffs on Banks Island, in the Canadian Arctic Archipelago, that record some of the oldest late Cenozoic glacial and nonglacial events in Canada. The preglacial Worth Point Formation, the overlying Duck Hawk Bluffs Formation, including marine and glacial deposits laid down during the Banks Glaciation, and the lower part of the interglacial Morgan Bluffs Formation have magnetically reversed directions and therefore are of Matuyama age (>790 ka). Upper Morgan Bluffs Formation organic beds and deposits of the younger Thomsen Glaciation, Cape Collinson Interglaciation, and Amundsen Glaciation are normally magnetized and therefore of Brunhes age (<790 ka). The Brunhes–Matuyama boundary is recorded in the upper portion of the Morgan Bluffs Formation. Its precise position within the interglacial sequence can be identified, since the sediments document the gradual change from reversely inclined directions to normally inclined ones. These results confirm that the preglacial Worth Point Formation is at least Early Pleistocene in age and that the Banks Glaciation (the oldest and strongest continental glaciation recorded in the western Arctic) and a good part of the Morgan Bluffs Formation are of Early Pleistocene age. The study also documents a rare site in Canada where terrestrial sediments record the Brunhes–Matuyama transition and in doing so permits a precise correlation of part of the Banks Island stratigraphy with other key late Tertiary and Early to Middle Pleistocene arctic terrestrial and marine sequences. Article in Journal/Newspaper Arctic Archipelago Arctic Banks Island Canadian Arctic Archipelago Canadian Science Publishing (via Crossref) Arctic Canadian Arctic Archipelago Canada Thomsen ENVELOPE(-66.232,-66.232,-65.794,-65.794) Duck Hawk Bluffs ENVELOPE(-125.693,-125.693,71.965,71.965) Worth Point ENVELOPE(-125.656,-125.656,72.261,72.261) Morgan Bluffs ENVELOPE(-119.805,-119.805,72.227,72.227) Canadian Journal of Earth Sciences 27 1 124 130 |
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 Barendregt, R. W. Vincent, Jean-Serge Late Cenozoic paleomagnetic record of Duck Hawk Bluffs, Banks Island, Canadian Arctic Archipelago |
topic_facet |
General Earth and Planetary Sciences |
description |
Detailed paleomagnetic investigations have been completed on unconsolidated sediments from Duck Hawk Bluffs on Banks Island, in the Canadian Arctic Archipelago, that record some of the oldest late Cenozoic glacial and nonglacial events in Canada. The preglacial Worth Point Formation, the overlying Duck Hawk Bluffs Formation, including marine and glacial deposits laid down during the Banks Glaciation, and the lower part of the interglacial Morgan Bluffs Formation have magnetically reversed directions and therefore are of Matuyama age (>790 ka). Upper Morgan Bluffs Formation organic beds and deposits of the younger Thomsen Glaciation, Cape Collinson Interglaciation, and Amundsen Glaciation are normally magnetized and therefore of Brunhes age (<790 ka). The Brunhes–Matuyama boundary is recorded in the upper portion of the Morgan Bluffs Formation. Its precise position within the interglacial sequence can be identified, since the sediments document the gradual change from reversely inclined directions to normally inclined ones. These results confirm that the preglacial Worth Point Formation is at least Early Pleistocene in age and that the Banks Glaciation (the oldest and strongest continental glaciation recorded in the western Arctic) and a good part of the Morgan Bluffs Formation are of Early Pleistocene age. The study also documents a rare site in Canada where terrestrial sediments record the Brunhes–Matuyama transition and in doing so permits a precise correlation of part of the Banks Island stratigraphy with other key late Tertiary and Early to Middle Pleistocene arctic terrestrial and marine sequences. |
format |
Article in Journal/Newspaper |
author |
Barendregt, R. W. Vincent, Jean-Serge |
author_facet |
Barendregt, R. W. Vincent, Jean-Serge |
author_sort |
Barendregt, R. W. |
title |
Late Cenozoic paleomagnetic record of Duck Hawk Bluffs, Banks Island, Canadian Arctic Archipelago |
title_short |
Late Cenozoic paleomagnetic record of Duck Hawk Bluffs, Banks Island, Canadian Arctic Archipelago |
title_full |
Late Cenozoic paleomagnetic record of Duck Hawk Bluffs, Banks Island, Canadian Arctic Archipelago |
title_fullStr |
Late Cenozoic paleomagnetic record of Duck Hawk Bluffs, Banks Island, Canadian Arctic Archipelago |
title_full_unstemmed |
Late Cenozoic paleomagnetic record of Duck Hawk Bluffs, Banks Island, Canadian Arctic Archipelago |
title_sort |
late cenozoic paleomagnetic record of duck hawk bluffs, banks island, canadian arctic archipelago |
publisher |
Canadian Science Publishing |
publishDate |
1990 |
url |
http://dx.doi.org/10.1139/e90-010 http://www.nrcresearchpress.com/doi/pdf/10.1139/e90-010 |
long_lat |
ENVELOPE(-66.232,-66.232,-65.794,-65.794) ENVELOPE(-125.693,-125.693,71.965,71.965) ENVELOPE(-125.656,-125.656,72.261,72.261) ENVELOPE(-119.805,-119.805,72.227,72.227) |
geographic |
Arctic Canadian Arctic Archipelago Canada Thomsen Duck Hawk Bluffs Worth Point Morgan Bluffs |
geographic_facet |
Arctic Canadian Arctic Archipelago Canada Thomsen Duck Hawk Bluffs Worth Point Morgan Bluffs |
genre |
Arctic Archipelago Arctic Banks Island Canadian Arctic Archipelago |
genre_facet |
Arctic Archipelago Arctic Banks Island Canadian Arctic Archipelago |
op_source |
Canadian Journal of Earth Sciences volume 27, issue 1, page 124-130 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e90-010 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
27 |
container_issue |
1 |
container_start_page |
124 |
op_container_end_page |
130 |
_version_ |
1785559294171676672 |