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: | http://dx.doi.org/10.1016/j.yqres.2016.02.005 http://api.elsevier.com/content/article/PII:S0033589416000193?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589416000193?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400000168 |
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crcambridgeupr:10.1016/j.yqres.2016.02.005 2024-09-15T18:12:19+00:00 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 Lian, Olav B. Levson, Victor M. Natural Sciences and Engineering Research Council (NSERC) British Columbia Pacific Leaders Scholarship 2016 http://dx.doi.org/10.1016/j.yqres.2016.02.005 http://api.elsevier.com/content/article/PII:S0033589416000193?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589416000193?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400000168 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms http://www.elsevier.com/tdm/userlicense/1.0/ Quaternary Research volume 85, issue 3, page 409-429 ISSN 0033-5894 1096-0287 journal-article 2016 crcambridgeupr https://doi.org/10.1016/j.yqres.2016.02.005 2024-06-26T04:03:49Z 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. Article in Journal/Newspaper Ice Sheet Cambridge University Press Quaternary Research 85 3 409 429 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
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. |
author2 |
Natural Sciences and Engineering Research Council (NSERC) British Columbia Pacific Leaders Scholarship |
format |
Article in Journal/Newspaper |
author |
Hickin, Adrian Scott Lian, Olav B. Levson, Victor M. |
spellingShingle |
Hickin, Adrian Scott Lian, Olav B. Levson, Victor M. Coalescence of late Wisconsinan Cordilleran and Laurentide ice sheets east of the Rocky Mountain Foothills in the Dawson Creek region, northeast British Columbia, Canada |
author_facet |
Hickin, Adrian Scott Lian, Olav B. Levson, Victor M. |
author_sort |
Hickin, Adrian Scott |
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 |
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 |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1016/j.yqres.2016.02.005 http://api.elsevier.com/content/article/PII:S0033589416000193?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589416000193?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400000168 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Quaternary Research volume 85, issue 3, page 409-429 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms http://www.elsevier.com/tdm/userlicense/1.0/ |
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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1810449901912326144 |