Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon
Stratigraphic, paleomagnetic, and radioisotope investigations of the Selkirk Volcanic Group have identified a new eruptive period and constrained the age of the Reid Glaciation, the most extensive middle Pleistocene cordilleran advance recognized in central Yukon. Downstream from Fort Selkirk, a com...
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crcansciencepubl:10.1139/e03-098 2023-12-17T10:51:31+01:00 Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon Huscroft, Crystal A Ward, Brent C Barendregt, René W Jackson Jr., Lionel E Opdyke, Neil D 2004 http://dx.doi.org/10.1139/e03-098 http://www.nrcresearchpress.com/doi/pdf/10.1139/e03-098 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 41, issue 2, page 151-164 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2004 crcansciencepubl https://doi.org/10.1139/e03-098 2023-11-19T13:38:15Z Stratigraphic, paleomagnetic, and radioisotope investigations of the Selkirk Volcanic Group have identified a new eruptive period and constrained the age of the Reid Glaciation, the most extensive middle Pleistocene cordilleran advance recognized in central Yukon. Downstream from Fort Selkirk, a complex of valley-filling compound pahoehoe basalt flows and pillow basalt is exposed for 10 km along the Yukon River and is overlain by outwash deposited during the Reid Glaciation. The flows have an 40 Ar/ 39 Ar age of 311 ± 32 ka. This age is consistent with the normal magnetization of the flows and their termination below the level of the contemporary Yukon River flood plain. Taken with the ca. 190 ka Sheep Creek tephra, which overlies Reid drift elsewhere in Yukon Territory, the Reid Glaciation is constrained to oxygen isotope stage 8, not stage 6 as previously thought. The presence of thick foreset-bedded pillow breccia units intercalated with the subaerial flows indicates that this eruption caused damming of the Yukon River. Reevaluation of the stratigraphy of early Pleistocene basalt flows and pillow lavas in the Fort Selkirk area indicates that volcanic damming of the Yukon River has occurred at least once previously. Article in Journal/Newspaper Yukon river Yukon Canadian Science Publishing (via Crossref) Yukon Fort Selkirk ENVELOPE(-137.390,-137.390,62.775,62.775) Canadian Journal of Earth Sciences 41 2 151 164 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Huscroft, Crystal A Ward, Brent C Barendregt, René W Jackson Jr., Lionel E Opdyke, Neil D Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon |
topic_facet |
General Earth and Planetary Sciences |
description |
Stratigraphic, paleomagnetic, and radioisotope investigations of the Selkirk Volcanic Group have identified a new eruptive period and constrained the age of the Reid Glaciation, the most extensive middle Pleistocene cordilleran advance recognized in central Yukon. Downstream from Fort Selkirk, a complex of valley-filling compound pahoehoe basalt flows and pillow basalt is exposed for 10 km along the Yukon River and is overlain by outwash deposited during the Reid Glaciation. The flows have an 40 Ar/ 39 Ar age of 311 ± 32 ka. This age is consistent with the normal magnetization of the flows and their termination below the level of the contemporary Yukon River flood plain. Taken with the ca. 190 ka Sheep Creek tephra, which overlies Reid drift elsewhere in Yukon Territory, the Reid Glaciation is constrained to oxygen isotope stage 8, not stage 6 as previously thought. The presence of thick foreset-bedded pillow breccia units intercalated with the subaerial flows indicates that this eruption caused damming of the Yukon River. Reevaluation of the stratigraphy of early Pleistocene basalt flows and pillow lavas in the Fort Selkirk area indicates that volcanic damming of the Yukon River has occurred at least once previously. |
format |
Article in Journal/Newspaper |
author |
Huscroft, Crystal A Ward, Brent C Barendregt, René W Jackson Jr., Lionel E Opdyke, Neil D |
author_facet |
Huscroft, Crystal A Ward, Brent C Barendregt, René W Jackson Jr., Lionel E Opdyke, Neil D |
author_sort |
Huscroft, Crystal A |
title |
Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon |
title_short |
Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon |
title_full |
Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon |
title_fullStr |
Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon |
title_full_unstemmed |
Pleistocene volcanic damming of Yukon River and the maximum age of the Reid Glaciation, west-central Yukon |
title_sort |
pleistocene volcanic damming of yukon river and the maximum age of the reid glaciation, west-central yukon |
publisher |
Canadian Science Publishing |
publishDate |
2004 |
url |
http://dx.doi.org/10.1139/e03-098 http://www.nrcresearchpress.com/doi/pdf/10.1139/e03-098 |
long_lat |
ENVELOPE(-137.390,-137.390,62.775,62.775) |
geographic |
Yukon Fort Selkirk |
geographic_facet |
Yukon Fort Selkirk |
genre |
Yukon river Yukon |
genre_facet |
Yukon river Yukon |
op_source |
Canadian Journal of Earth Sciences volume 41, issue 2, page 151-164 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e03-098 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
41 |
container_issue |
2 |
container_start_page |
151 |
op_container_end_page |
164 |
_version_ |
1785576815486566400 |