Stratigraphy of Pleistocene glaciations in the St Elias Mountains, southwest Yukon, Canada
At least five Middle to Late Pleistocene advances of the northern Cordilleran Ice Sheet are preserved at Silver Creek, on the northeastern edge of the St Elias Mountains in southwest Yukon, Canada. Silver Creek is located 100 km up-ice of the Marine Isotope Stage (MIS) 2 McConnell glacial limit of t...
Published in: | Boreas |
---|---|
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley (Boreas Collegium)
2016
|
Subjects: | |
Online Access: | https://arcabc.ca/islandora/object/dc%3A45351 https://search.ebscohost.com/login.aspx?direct=true&AuthType=ip,sso&db=geh&AN=2016-074599&site=eds-live&scope=site&custid=s5672421 https://doi.org/10.1111/bor.12172 https://onlinelibrary.wiley.com/doi/full/10.1111/bor.12172 |
id |
ftarcabc:oai:arcabc.ca:dc_45351 |
---|---|
record_format |
openpolar |
spelling |
ftarcabc:oai:arcabc.ca:dc_45351 2024-06-02T08:08:20+00:00 Stratigraphy of Pleistocene glaciations in the St Elias Mountains, southwest Yukon, Canada Turner, Derek G. (turnerd) (Author) Ward, Brent C. (Author) Froese, Duane G. (Author) Lamothe, Michel (Author) Bond, Jeffrey D. (Author) Bigelow, Nancy H. (Author) 2016 https://arcabc.ca/islandora/object/dc%3A45351 https://search.ebscohost.com/login.aspx?direct=true&AuthType=ip,sso&db=geh&AN=2016-074599&site=eds-live&scope=site&custid=s5672421 https://doi.org/10.1111/bor.12172 https://onlinelibrary.wiley.com/doi/full/10.1111/bor.12172 English eng Wiley (Boreas Collegium) Boreas https://arcabc.ca/islandora/object/dc%3A45351 dc:45351 https://search.ebscohost.com/login.aspx?direct=true&AuthType=ip,sso&db=geh&AN=2016-074599&site=eds-live&scope=site&custid=s5672421 issn: 0300-9483 eissn: 1502-3885 doi:10.1111/bor.12172 https://onlinelibrary.wiley.com/doi/full/10.1111/bor.12172 http://rightsstatements.org/vocab/InC-EDU/1.0/ ©2016. Collegium Boreas. John Wiley & Sons Ltd. article Text 2016 ftarcabc https://doi.org/10.1111/bor.12172 2024-05-06T00:30:44Z At least five Middle to Late Pleistocene advances of the northern Cordilleran Ice Sheet are preserved at Silver Creek, on the northeastern edge of the St Elias Mountains in southwest Yukon, Canada. Silver Creek is located 100 km up-ice of the Marine Isotope Stage (MIS) 2 McConnell glacial limit of the St Elias lobe. This site contains approximately 3 km of nearly continuous lateral exposure of glacial and non-glacial sediments, including multiple tills separated by thick gravel, loess and tilted lake beds. Infrared-stimulated luminescence (IRSL) and AMS radiocarbon dating constrain the glacial deposits to MIS 2, 4, either MIS 6 or mid-MIS 7, and two older Middle Pleistocene advances. This chronology and the tilt of the lake beds suggest Pleistocene uplift rates of up to 1.9 mm a (super -1) along the Denali Fault since MIS 7. The non-glacial sediment consists of sand, gravel, loess and organic beds from MIS 7, MIS 3 and the early Holocene. The MIS 3 deposits date to between 30-36 (super 14) C ka BP, making Silver Creek one of the few well-constrained MIS 3-aged sites in Yukon. This confirms that ice receded close to modern limits in MIS 3. Pollen and macrofossil analyses show that a meadow-tundra to steppe-tundra mosaic with abundant herbs and forbs and few shrubs or trees, dominated the environment at this time. The stratigraphy at Silver Creek provides a palaeoclimatic record since at least MIS 8 and comprises the oldest direct record of Pleistocene glaciation in southwest Yukon. Abstract Copyright (2016), John Wiley & Sons, Ltd. Peer reviewed Final article published Article in Journal/Newspaper Ice Sheet Tundra Yukon Arca (BC's Digital Treasures) Yukon Canada Silver Creek ENVELOPE(-138.401,-138.401,61.040,61.040) Boreas 45 3 521 536 |
institution |
Open Polar |
collection |
Arca (BC's Digital Treasures) |
op_collection_id |
ftarcabc |
language |
English |
description |
At least five Middle to Late Pleistocene advances of the northern Cordilleran Ice Sheet are preserved at Silver Creek, on the northeastern edge of the St Elias Mountains in southwest Yukon, Canada. Silver Creek is located 100 km up-ice of the Marine Isotope Stage (MIS) 2 McConnell glacial limit of the St Elias lobe. This site contains approximately 3 km of nearly continuous lateral exposure of glacial and non-glacial sediments, including multiple tills separated by thick gravel, loess and tilted lake beds. Infrared-stimulated luminescence (IRSL) and AMS radiocarbon dating constrain the glacial deposits to MIS 2, 4, either MIS 6 or mid-MIS 7, and two older Middle Pleistocene advances. This chronology and the tilt of the lake beds suggest Pleistocene uplift rates of up to 1.9 mm a (super -1) along the Denali Fault since MIS 7. The non-glacial sediment consists of sand, gravel, loess and organic beds from MIS 7, MIS 3 and the early Holocene. The MIS 3 deposits date to between 30-36 (super 14) C ka BP, making Silver Creek one of the few well-constrained MIS 3-aged sites in Yukon. This confirms that ice receded close to modern limits in MIS 3. Pollen and macrofossil analyses show that a meadow-tundra to steppe-tundra mosaic with abundant herbs and forbs and few shrubs or trees, dominated the environment at this time. The stratigraphy at Silver Creek provides a palaeoclimatic record since at least MIS 8 and comprises the oldest direct record of Pleistocene glaciation in southwest Yukon. Abstract Copyright (2016), John Wiley & Sons, Ltd. Peer reviewed Final article published |
author2 |
Turner, Derek G. (turnerd) (Author) Ward, Brent C. (Author) Froese, Duane G. (Author) Lamothe, Michel (Author) Bond, Jeffrey D. (Author) Bigelow, Nancy H. (Author) |
format |
Article in Journal/Newspaper |
title |
Stratigraphy of Pleistocene glaciations in the St Elias Mountains, southwest Yukon, Canada |
spellingShingle |
Stratigraphy of Pleistocene glaciations in the St Elias Mountains, southwest Yukon, Canada |
title_short |
Stratigraphy of Pleistocene glaciations in the St Elias Mountains, southwest Yukon, Canada |
title_full |
Stratigraphy of Pleistocene glaciations in the St Elias Mountains, southwest Yukon, Canada |
title_fullStr |
Stratigraphy of Pleistocene glaciations in the St Elias Mountains, southwest Yukon, Canada |
title_full_unstemmed |
Stratigraphy of Pleistocene glaciations in the St Elias Mountains, southwest Yukon, Canada |
title_sort |
stratigraphy of pleistocene glaciations in the st elias mountains, southwest yukon, canada |
publisher |
Wiley (Boreas Collegium) |
publishDate |
2016 |
url |
https://arcabc.ca/islandora/object/dc%3A45351 https://search.ebscohost.com/login.aspx?direct=true&AuthType=ip,sso&db=geh&AN=2016-074599&site=eds-live&scope=site&custid=s5672421 https://doi.org/10.1111/bor.12172 https://onlinelibrary.wiley.com/doi/full/10.1111/bor.12172 |
long_lat |
ENVELOPE(-138.401,-138.401,61.040,61.040) |
geographic |
Yukon Canada Silver Creek |
geographic_facet |
Yukon Canada Silver Creek |
genre |
Ice Sheet Tundra Yukon |
genre_facet |
Ice Sheet Tundra Yukon |
op_relation |
Boreas https://arcabc.ca/islandora/object/dc%3A45351 dc:45351 https://search.ebscohost.com/login.aspx?direct=true&AuthType=ip,sso&db=geh&AN=2016-074599&site=eds-live&scope=site&custid=s5672421 issn: 0300-9483 eissn: 1502-3885 doi:10.1111/bor.12172 https://onlinelibrary.wiley.com/doi/full/10.1111/bor.12172 |
op_rights |
http://rightsstatements.org/vocab/InC-EDU/1.0/ ©2016. Collegium Boreas. John Wiley & Sons Ltd. |
op_doi |
https://doi.org/10.1111/bor.12172 |
container_title |
Boreas |
container_volume |
45 |
container_issue |
3 |
container_start_page |
521 |
op_container_end_page |
536 |
_version_ |
1800753542536888320 |