Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories
South Nahanni National Park transects the southern Mackenzie Mountains from a position close to the continental divide to their eastern limit. In the context of glaciation it displays three distinct zones: I, in the west, a cordilleran glacial zone with evidence of two or more phases of valley glaci...
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1976
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crcansciencepubl:10.1139/e76-147 2024-09-15T18:18:10+00:00 Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories Ford, D. C. 1976 http://dx.doi.org/10.1139/e76-147 http://www.nrcresearchpress.com/doi/pdf/10.1139/e76-147 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 13, issue 10, page 1433-1445 ISSN 0008-4077 1480-3313 journal-article 1976 crcansciencepubl https://doi.org/10.1139/e76-147 2024-07-18T04:13:36Z South Nahanni National Park transects the southern Mackenzie Mountains from a position close to the continental divide to their eastern limit. In the context of glaciation it displays three distinct zones: I, in the west, a cordilleran glacial zone with evidence of two or more phases of valley glaciation; II, in the east, a Laurentide glacial zone with evidence of invasion by three successive Laurentide ice sheets; III, a central unglaciated zone. Lacustrine deposits of two distinct phases extend into all three zones and are attributed to ice damming during the last two Laurentide glacial incursions.Stratigraphic studies of caves of the area, incorporating 230 Th/ 234 U age determinations of calcite speleothems, indicate that the earliest Laurentide incursion occurred before (350) 320 000 y BP, the others after 190 000 y BP. Events of the two glacial zones are correlated and it is suggested that there was only one major glacial event in each zone during the Illinoisan Glacial and Wisconsinan Glacial. Article in Journal/Newspaper Mackenzie mountains Nahanni National Park Northwest Territories Canadian Science Publishing Canadian Journal of Earth Sciences 13 10 1433 1445 |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
South Nahanni National Park transects the southern Mackenzie Mountains from a position close to the continental divide to their eastern limit. In the context of glaciation it displays three distinct zones: I, in the west, a cordilleran glacial zone with evidence of two or more phases of valley glaciation; II, in the east, a Laurentide glacial zone with evidence of invasion by three successive Laurentide ice sheets; III, a central unglaciated zone. Lacustrine deposits of two distinct phases extend into all three zones and are attributed to ice damming during the last two Laurentide glacial incursions.Stratigraphic studies of caves of the area, incorporating 230 Th/ 234 U age determinations of calcite speleothems, indicate that the earliest Laurentide incursion occurred before (350) 320 000 y BP, the others after 190 000 y BP. Events of the two glacial zones are correlated and it is suggested that there was only one major glacial event in each zone during the Illinoisan Glacial and Wisconsinan Glacial. |
format |
Article in Journal/Newspaper |
author |
Ford, D. C. |
spellingShingle |
Ford, D. C. Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories |
author_facet |
Ford, D. C. |
author_sort |
Ford, D. C. |
title |
Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories |
title_short |
Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories |
title_full |
Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories |
title_fullStr |
Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories |
title_full_unstemmed |
Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories |
title_sort |
evidences of multiple glaciation in south nahanni national park, mackenzie mountains, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1976 |
url |
http://dx.doi.org/10.1139/e76-147 http://www.nrcresearchpress.com/doi/pdf/10.1139/e76-147 |
genre |
Mackenzie mountains Nahanni National Park Northwest Territories |
genre_facet |
Mackenzie mountains Nahanni National Park Northwest Territories |
op_source |
Canadian Journal of Earth Sciences volume 13, issue 10, page 1433-1445 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e76-147 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
13 |
container_issue |
10 |
container_start_page |
1433 |
op_container_end_page |
1445 |
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1810456288997408768 |