Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada
Geomorphic, stratigraphic and geochronological evidence from northeast British Columbia (Canada) indicates that, during the late Wisconsinan (approximately equivalent to marine oxygen isotope stage [MIS] 2), a major lobe of western-sourced ice coalesced with the northeastern-sourced Laurentide Ice S...
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Online Access: | https://doi.org/10.1016/j.yqres.2016.02.005 https://ufv.arcabc.ca/islandora/object/ufv%3A179 |
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ftunfraservalley:oai:ufv.arcabc.ca:ufv_179 2023-10-29T02:37:06+01:00 Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada Hickin, Adrian Scott (Adrian Scott Hickin (ashickin)) (Author) Lian, Olav B. (Olav B. Lian (olian)) (Author) Levson, Victor M. (Victor M. Levson (vmlevson)) (Author) 55°26'29.1"N 120°42'39.7"W https://doi.org/10.1016/j.yqres.2016.02.005 https://ufv.arcabc.ca/islandora/object/ufv%3A179 English eng Quaternary Research--Quaternary Research--00335894 http://www.sherpa.ac.uk/romeo/issn/0033-5894/ http://rightsstatements.org/vocab/InC/1.0/ http://creativecommons.org/licenses/by-nc-nd/4.0/ article Text ftunfraservalley https://doi.org/10.1016/j.yqres.2016.02.005 2023-10-01T17:42:38Z Geomorphic, stratigraphic and geochronological evidence from northeast British Columbia (Canada) indicates that, during the late Wisconsinan (approximately equivalent to marine oxygen isotope stage [MIS] 2), a major lobe of western-sourced ice coalesced with the northeastern-sourced Laurentide Ice Sheet (LIS). High-resolution digital elevation models reveal a continuous 75 km-long field of streamlined landforms that indicate the ice flow direction of a major northeast-flowing lobe of the Cordilleran Ice Sheet (CIS) or a montane glacier (>200 km wide) was deflected to a north-northwest trajectory as it coalesced with the retreating LIS. The streamlined landforms are composed of till containing clasts of eastern provenance that imply that the LIS reached its maximum extent before the western-sourced ice flow crossed the area. Since the LIS only reached this region in the late Wisconsinan, the CIS/montane ice responsible for the streamlined landforms must have occupied the area after the LIS withdrew. Stratigraphy from the Murray and Pine river valleys supports a late Wisconsinan age for the surface landforms and records two glacial events separated by a non-glacial interval that was dated to be of middle Wisconsinan (MIS 3) age. Peer reviewed Cordilleran ice sheet; Laurentide ice sheet; Ice sheet coalescence; Ice free corridor; LiDAR; Stratigraphy; Optical dating; OSL; Ice flow; Till geochemistry Article in Journal/Newspaper Ice Sheet University of the Fraser Valley (UFV): HarvestIR Quaternary Research 85 3 409 429 |
institution |
Open Polar |
collection |
University of the Fraser Valley (UFV): HarvestIR |
op_collection_id |
ftunfraservalley |
language |
English |
description |
Geomorphic, stratigraphic and geochronological evidence from northeast British Columbia (Canada) indicates that, during the late Wisconsinan (approximately equivalent to marine oxygen isotope stage [MIS] 2), a major lobe of western-sourced ice coalesced with the northeastern-sourced Laurentide Ice Sheet (LIS). High-resolution digital elevation models reveal a continuous 75 km-long field of streamlined landforms that indicate the ice flow direction of a major northeast-flowing lobe of the Cordilleran Ice Sheet (CIS) or a montane glacier (>200 km wide) was deflected to a north-northwest trajectory as it coalesced with the retreating LIS. The streamlined landforms are composed of till containing clasts of eastern provenance that imply that the LIS reached its maximum extent before the western-sourced ice flow crossed the area. Since the LIS only reached this region in the late Wisconsinan, the CIS/montane ice responsible for the streamlined landforms must have occupied the area after the LIS withdrew. Stratigraphy from the Murray and Pine river valleys supports a late Wisconsinan age for the surface landforms and records two glacial events separated by a non-glacial interval that was dated to be of middle Wisconsinan (MIS 3) age. Peer reviewed Cordilleran ice sheet; Laurentide ice sheet; Ice sheet coalescence; Ice free corridor; LiDAR; Stratigraphy; Optical dating; OSL; Ice flow; Till geochemistry |
author2 |
Hickin, Adrian Scott (Adrian Scott Hickin (ashickin)) (Author) Lian, Olav B. (Olav B. Lian (olian)) (Author) Levson, Victor M. (Victor M. Levson (vmlevson)) (Author) |
format |
Article in Journal/Newspaper |
title |
Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada |
spellingShingle |
Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada |
title_short |
Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada |
title_full |
Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada |
title_fullStr |
Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada |
title_full_unstemmed |
Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada |
title_sort |
coalescence of late wisconsinan cordilleran and laurentide ice sheets east of the rocky mountain foothills in the dawson creek region, northeast british columbia, canada |
url |
https://doi.org/10.1016/j.yqres.2016.02.005 https://ufv.arcabc.ca/islandora/object/ufv%3A179 |
op_coverage |
55°26'29.1"N 120°42'39.7"W |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Quaternary Research--Quaternary Research--00335894 |
op_rights |
http://www.sherpa.ac.uk/romeo/issn/0033-5894/ http://rightsstatements.org/vocab/InC/1.0/ http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1016/j.yqres.2016.02.005 |
container_title |
Quaternary Research |
container_volume |
85 |
container_issue |
3 |
container_start_page |
409 |
op_container_end_page |
429 |
_version_ |
1781061471336136704 |