In the past, researchers have disagreed over the maximum extent of the Cordilleran Ice Sheet in the Peace River valley during the Late Wisconsinan. Some workers argued that Cordilleran ice reached beyond the Rocky Mountains and briefly coalesced with the Laurentide Ice Sheet on the westernmost Interior Plains. In contrast, others asserted that Cordilleran ice did not reach beyond the eastern front of the Rocky Mountains. Stratigraphic interpretation of three sections within a Middle Wisconsinan paleovalley and re-examination of a previously published regional stratigraphic framework show that western-sourced ice (likely the Cordilleran Ice Sheet) extended east of the mountain front during the Late Wisconsinan, prior to the incursion of the Laurentide Ice Sheet into the area. This conclusion has implications for Cordilleran Ice Sheet reconstruction and modelling, and provides insight into the interactions between the Cordilleran and Laurentide ice sheets during the last glaciation.
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Research Article|
August 08, 2018
Late Wisconsinan Cordilleran and Laurentide glaciation of the Peace River Valley east of the Rocky Mountains, British Columbia
Gregory M.D. Hartman;
Alberta Geological Survey, 4th Floor Twin Atria Building, 4999-98 Ave. Edmonton, AB T6B 2X3, Canada.
Corresponding author: Gregory M.D. Hartman (email: greg.hartman@aer.ca).
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John J. Clague;
John J. Clague
Department of Earth Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
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René W. Barendregt;
René W. Barendregt
Department of Geography, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada.
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Alberto V. Reyes
Alberto V. Reyes
Department of Earth and Atmospheric Sciences, 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB T6G 2E3, Canada.
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Canadian Journal of Earth Sciences (2018) 55 (12): 1324–1338.
Article history
received:
15 Jan 2018
accepted:
01 Aug 2018
first online:
17 Dec 2018
Citation
Gregory M.D. Hartman, John J. Clague, René W. Barendregt, Alberto V. Reyes; Late Wisconsinan Cordilleran and Laurentide glaciation of the Peace River Valley east of the Rocky Mountains, British Columbia. Canadian Journal of Earth Sciences 2018;; 55 (12): 1324–1338. doi: https://doi.org/10.1139/cjes-2018-0015
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Index Terms/Descriptors
- British Columbia
- Canada
- Canadian Rocky Mountains
- Cenozoic
- Cordilleran ice sheet
- correlation
- glacial environment
- glaciation
- ice sheets
- Laurentide ice sheet
- lithostratigraphy
- North America
- paleoenvironment
- paleomagnetism
- Pleistocene
- Quaternary
- Rocky Mountains
- upper Pleistocene
- upper Wisconsinan
- Western Canada
- Wisconsinan
- Dry Creek
- Peace River valley
- Halfway River
- Lynx Creek
Latitude & Longitude
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