Optically stimulated luminescence ages from the Lake Agassiz basin in Manitoba
Abstract Geomorphic analysis and optically stimulated luminescence (OSL) ages from undated Lake Agassiz beaches and adjacent fluvial sediments on Riding Mountain in Manitoba provide insight into their early history. New OSL ages of 14.5±2.4 and 13.4±0.7 ka on the oldest (Herman to Norcross) beaches...
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crcambridgeupr:10.1017/qua.2017.107 2024-10-06T13:49:35+00:00 Optically stimulated luminescence ages from the Lake Agassiz basin in Manitoba Teller, James T. McGinn, Roderick A. Rajapara, Haresh M. Shukla, Anil D. Singhvi, Ashok K. 2018 http://dx.doi.org/10.1017/qua.2017.107 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589417001077 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 89, issue 2, page 478-493 ISSN 0033-5894 1096-0287 journal-article 2018 crcambridgeupr https://doi.org/10.1017/qua.2017.107 2024-09-25T04:02:04Z Abstract Geomorphic analysis and optically stimulated luminescence (OSL) ages from undated Lake Agassiz beaches and adjacent fluvial sediments on Riding Mountain in Manitoba provide insight into their early history. New OSL ages of 14.5±2.4 and 13.4±0.7 ka on the oldest (Herman to Norcross) beaches of Lake Agassiz near the Canada-U.S. border indicate that the Laurentide Ice Sheet (LIS) retreated from that part of the Agassiz basin by ~14.5 ka. To the north along Riding Mountain, the Herman strandlines are absent, and OSL ages on the oldest beach there average 12.9 ka, which links it to the younger Norcross-Tintah strandlines. In adjacent Riding Mountain, OSL ages and geomorphological relationships of a large abandoned glacial spillway >200 m above the oldest beaches of Lake Agassiz indicate that this channel predates retreat of the LIS and formation of beaches in this part of the Agassiz basin, with ice remaining in this area until after 14.5 ka. OSL ages on the Gimli beach 170 km to the east are >3000 yr older than conventional assignments, suggesting that it formed during the Moorhead low-water phase 12.8–10.6 ka. Luminescence ages support the conclusion that the Campbell beach formed ~10.9 ka near the end of the Moorhead low-water phase. Article in Journal/Newspaper Ice Sheet Cambridge University Press Canada Quaternary Research 89 2 478 493 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Geomorphic analysis and optically stimulated luminescence (OSL) ages from undated Lake Agassiz beaches and adjacent fluvial sediments on Riding Mountain in Manitoba provide insight into their early history. New OSL ages of 14.5±2.4 and 13.4±0.7 ka on the oldest (Herman to Norcross) beaches of Lake Agassiz near the Canada-U.S. border indicate that the Laurentide Ice Sheet (LIS) retreated from that part of the Agassiz basin by ~14.5 ka. To the north along Riding Mountain, the Herman strandlines are absent, and OSL ages on the oldest beach there average 12.9 ka, which links it to the younger Norcross-Tintah strandlines. In adjacent Riding Mountain, OSL ages and geomorphological relationships of a large abandoned glacial spillway >200 m above the oldest beaches of Lake Agassiz indicate that this channel predates retreat of the LIS and formation of beaches in this part of the Agassiz basin, with ice remaining in this area until after 14.5 ka. OSL ages on the Gimli beach 170 km to the east are >3000 yr older than conventional assignments, suggesting that it formed during the Moorhead low-water phase 12.8–10.6 ka. Luminescence ages support the conclusion that the Campbell beach formed ~10.9 ka near the end of the Moorhead low-water phase. |
format |
Article in Journal/Newspaper |
author |
Teller, James T. McGinn, Roderick A. Rajapara, Haresh M. Shukla, Anil D. Singhvi, Ashok K. |
spellingShingle |
Teller, James T. McGinn, Roderick A. Rajapara, Haresh M. Shukla, Anil D. Singhvi, Ashok K. Optically stimulated luminescence ages from the Lake Agassiz basin in Manitoba |
author_facet |
Teller, James T. McGinn, Roderick A. Rajapara, Haresh M. Shukla, Anil D. Singhvi, Ashok K. |
author_sort |
Teller, James T. |
title |
Optically stimulated luminescence ages from the Lake Agassiz basin in Manitoba |
title_short |
Optically stimulated luminescence ages from the Lake Agassiz basin in Manitoba |
title_full |
Optically stimulated luminescence ages from the Lake Agassiz basin in Manitoba |
title_fullStr |
Optically stimulated luminescence ages from the Lake Agassiz basin in Manitoba |
title_full_unstemmed |
Optically stimulated luminescence ages from the Lake Agassiz basin in Manitoba |
title_sort |
optically stimulated luminescence ages from the lake agassiz basin in manitoba |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1017/qua.2017.107 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589417001077 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Quaternary Research volume 89, issue 2, page 478-493 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/qua.2017.107 |
container_title |
Quaternary Research |
container_volume |
89 |
container_issue |
2 |
container_start_page |
478 |
op_container_end_page |
493 |
_version_ |
1812177656209211392 |