Lithalsa Formation and Holocene Lake‐Level Recession, Great Slave Lowland, Northwest Territories
Abstract Lithalsas (ice‐cored permafrost mounds) are common within silty clay sediments of the Great Slave Lowland, a low‐relief bedrock plain extending to about 50 m above Great Slave Lake, Northwest Territories. Following retreat of the Laurentide Ice Sheet, sediment deposition in the lowland acco...
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crwiley:10.1002/ppp.1901 2024-06-02T08:07:10+00:00 Lithalsa Formation and Holocene Lake‐Level Recession, Great Slave Lowland, Northwest Territories Wolfe, S. A. Morse, P. D. 2016 http://dx.doi.org/10.1002/ppp.1901 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1901 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1901 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 28, issue 3, page 573-579 ISSN 1045-6740 1099-1530 journal-article 2016 crwiley https://doi.org/10.1002/ppp.1901 2024-05-03T10:54:18Z Abstract Lithalsas (ice‐cored permafrost mounds) are common within silty clay sediments of the Great Slave Lowland, a low‐relief bedrock plain extending to about 50 m above Great Slave Lake, Northwest Territories. Following retreat of the Laurentide Ice Sheet, sediment deposition in the lowland accompanied inundation by glacial Lake McConnell between about 12 700 and 9300 cal BP, and continued subsequently in ancestral Great Slave Lake. Lake‐level recession has occurred locally at about 5 mm · a −1 for the last 8000 years, due primarily to isostatic rebound. Maximum limiting ages of permafrost and lithalsas in the lowland are elevation‐dependent, being least near the modern shoreline and greater at higher elevations. Many lithalsas, which are up to 8 m high and several hundred metres wide, are less than 3000 years old. They are abundant in alluvium of the Yellowknife River deposited within the last 2000 years, with permafrost aggradation and lithalsa formation continuing in historical time. Copyright © 2016 John Wiley & Sons, Ltd. Article in Journal/Newspaper Great Slave Lake Ice Ice Sheet Northwest Territories permafrost Permafrost and Periglacial Processes Yellowknife Wiley Online Library Northwest Territories Yellowknife Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Great Slave Lake ENVELOPE(-114.001,-114.001,61.500,61.500) Yellowknife River ENVELOPE(-114.319,-114.319,62.519,62.519) Permafrost and Periglacial Processes 28 3 573 579 |
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Open Polar |
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Wiley Online Library |
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English |
description |
Abstract Lithalsas (ice‐cored permafrost mounds) are common within silty clay sediments of the Great Slave Lowland, a low‐relief bedrock plain extending to about 50 m above Great Slave Lake, Northwest Territories. Following retreat of the Laurentide Ice Sheet, sediment deposition in the lowland accompanied inundation by glacial Lake McConnell between about 12 700 and 9300 cal BP, and continued subsequently in ancestral Great Slave Lake. Lake‐level recession has occurred locally at about 5 mm · a −1 for the last 8000 years, due primarily to isostatic rebound. Maximum limiting ages of permafrost and lithalsas in the lowland are elevation‐dependent, being least near the modern shoreline and greater at higher elevations. Many lithalsas, which are up to 8 m high and several hundred metres wide, are less than 3000 years old. They are abundant in alluvium of the Yellowknife River deposited within the last 2000 years, with permafrost aggradation and lithalsa formation continuing in historical time. Copyright © 2016 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Wolfe, S. A. Morse, P. D. |
spellingShingle |
Wolfe, S. A. Morse, P. D. Lithalsa Formation and Holocene Lake‐Level Recession, Great Slave Lowland, Northwest Territories |
author_facet |
Wolfe, S. A. Morse, P. D. |
author_sort |
Wolfe, S. A. |
title |
Lithalsa Formation and Holocene Lake‐Level Recession, Great Slave Lowland, Northwest Territories |
title_short |
Lithalsa Formation and Holocene Lake‐Level Recession, Great Slave Lowland, Northwest Territories |
title_full |
Lithalsa Formation and Holocene Lake‐Level Recession, Great Slave Lowland, Northwest Territories |
title_fullStr |
Lithalsa Formation and Holocene Lake‐Level Recession, Great Slave Lowland, Northwest Territories |
title_full_unstemmed |
Lithalsa Formation and Holocene Lake‐Level Recession, Great Slave Lowland, Northwest Territories |
title_sort |
lithalsa formation and holocene lake‐level recession, great slave lowland, northwest territories |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/ppp.1901 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.1901 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.1901 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(-114.001,-114.001,61.500,61.500) ENVELOPE(-114.319,-114.319,62.519,62.519) |
geographic |
Northwest Territories Yellowknife Glacial Lake Great Slave Lake Yellowknife River |
geographic_facet |
Northwest Territories Yellowknife Glacial Lake Great Slave Lake Yellowknife River |
genre |
Great Slave Lake Ice Ice Sheet Northwest Territories permafrost Permafrost and Periglacial Processes Yellowknife |
genre_facet |
Great Slave Lake Ice Ice Sheet Northwest Territories permafrost Permafrost and Periglacial Processes Yellowknife |
op_source |
Permafrost and Periglacial Processes volume 28, issue 3, page 573-579 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.1901 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
28 |
container_issue |
3 |
container_start_page |
573 |
op_container_end_page |
579 |
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1800752174919057408 |