Cosmogenic 36 Cl dating of the maximum limit of the Laurentide Ice Sheet in southwestern Alberta
Cosmogenic 36 Cl ages were determined on 11 glacial erratics from the summits of Porcupine Hills and Cloudy Ridge, Waterton valley, and the Foothills south of Cardston, Alberta. These erratics were derived from the Canadian Shield and the Rocky Mountains of the Waterton area. They were laid down by...
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crcansciencepubl:10.1139/e99-038 2023-12-17T10:31:43+01:00 Cosmogenic 36 Cl dating of the maximum limit of the Laurentide Ice Sheet in southwestern Alberta Jackson, Jr., Lionel E Phillips, Fred M Little, Edward C 1999 http://dx.doi.org/10.1139/e99-038 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-038 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 36, issue 8, page 1347-1356 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1999 crcansciencepubl https://doi.org/10.1139/e99-038 2023-11-19T13:39:20Z Cosmogenic 36 Cl ages were determined on 11 glacial erratics from the summits of Porcupine Hills and Cloudy Ridge, Waterton valley, and the Foothills south of Cardston, Alberta. These erratics were derived from the Canadian Shield and the Rocky Mountains of the Waterton area. They were laid down by (1) the most extensive advance of a Canadian Shield centred continental ice sheet into this region (stratigraphically oldest glacial deposits); (2) a montane glacial advance from the Waterton valley (stratigraphically intermediate glacial deposits); and (3) an advance of continental glacial ice that overrode deposits of the intermediate-age montane advance. Zero erosion rate 36 Cl ages of the erratics, uncorrected for snow cover, range between about 12 and 18 ka. They support the hypothesis that the Laurentide Ice Sheet reached farther into the southwestern Foothills than did all the previous continental ice sheets. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing (via Crossref) Canadian Journal of Earth Sciences 36 8 1347 1356 |
institution |
Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Jackson, Jr., Lionel E Phillips, Fred M Little, Edward C Cosmogenic 36 Cl dating of the maximum limit of the Laurentide Ice Sheet in southwestern Alberta |
topic_facet |
General Earth and Planetary Sciences |
description |
Cosmogenic 36 Cl ages were determined on 11 glacial erratics from the summits of Porcupine Hills and Cloudy Ridge, Waterton valley, and the Foothills south of Cardston, Alberta. These erratics were derived from the Canadian Shield and the Rocky Mountains of the Waterton area. They were laid down by (1) the most extensive advance of a Canadian Shield centred continental ice sheet into this region (stratigraphically oldest glacial deposits); (2) a montane glacial advance from the Waterton valley (stratigraphically intermediate glacial deposits); and (3) an advance of continental glacial ice that overrode deposits of the intermediate-age montane advance. Zero erosion rate 36 Cl ages of the erratics, uncorrected for snow cover, range between about 12 and 18 ka. They support the hypothesis that the Laurentide Ice Sheet reached farther into the southwestern Foothills than did all the previous continental ice sheets. |
format |
Article in Journal/Newspaper |
author |
Jackson, Jr., Lionel E Phillips, Fred M Little, Edward C |
author_facet |
Jackson, Jr., Lionel E Phillips, Fred M Little, Edward C |
author_sort |
Jackson, Jr., Lionel E |
title |
Cosmogenic 36 Cl dating of the maximum limit of the Laurentide Ice Sheet in southwestern Alberta |
title_short |
Cosmogenic 36 Cl dating of the maximum limit of the Laurentide Ice Sheet in southwestern Alberta |
title_full |
Cosmogenic 36 Cl dating of the maximum limit of the Laurentide Ice Sheet in southwestern Alberta |
title_fullStr |
Cosmogenic 36 Cl dating of the maximum limit of the Laurentide Ice Sheet in southwestern Alberta |
title_full_unstemmed |
Cosmogenic 36 Cl dating of the maximum limit of the Laurentide Ice Sheet in southwestern Alberta |
title_sort |
cosmogenic 36 cl dating of the maximum limit of the laurentide ice sheet in southwestern alberta |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/e99-038 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-038 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 36, issue 8, page 1347-1356 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e99-038 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
36 |
container_issue |
8 |
container_start_page |
1347 |
op_container_end_page |
1356 |
_version_ |
1785585101256523776 |