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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Published in:Quaternary Research
Other Authors: 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
Language:English
Published: 2016
Subjects:
Ice Sheet
Online Access:https://arcabc.ca/islandora/object/ufv%3A179
https://doi.org/10.1016/j.yqres.2016.02.005
http://linkinghub.elsevier.com/retrieve/pii/S0033589416000193
id ftarcabc:oai:arcabc.ca:ufv_179
record_format openpolar
spelling ftarcabc:oai: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 2016-05 https://arcabc.ca/islandora/object/ufv%3A179 https://doi.org/10.1016/j.yqres.2016.02.005 http://linkinghub.elsevier.com/retrieve/pii/S0033589416000193 English eng Quaternary Research--Quaternary Research--00335894 https://arcabc.ca/islandora/object/ufv%3A179 ufv:179 doi:10.1016/j.yqres.2016.02.005 http://linkinghub.elsevier.com/retrieve/pii/S0033589416000193 issn: 0033-5894 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 2016 ftarcabc https://doi.org/10.1016/j.yqres.2016.02.005 2023-10-01T17:59:07Z 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 Arca (BC's Digital Treasures) Quaternary Research 85 3 409 429
institution Open Polar
collection Arca (BC's Digital Treasures)
op_collection_id ftarcabc
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
publishDate 2016
url https://arcabc.ca/islandora/object/ufv%3A179
https://doi.org/10.1016/j.yqres.2016.02.005
http://linkinghub.elsevier.com/retrieve/pii/S0033589416000193
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
https://arcabc.ca/islandora/object/ufv%3A179
ufv:179
doi:10.1016/j.yqres.2016.02.005
http://linkinghub.elsevier.com/retrieve/pii/S0033589416000193
issn: 0033-5894
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
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