Vashon Drift: definition of the formation in the Georgia Depression, southwest British Columbia
Vashon Drift was deposited during the Fraser Glaciation (late Wisconsinan) at the time of maximum expansion of the southwestern part of the Cordilleran ice sheet when it filled the Georgia Depression about 14 500 years ago. The drift is present throughout the depression and comprises till and glacio...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1985
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e85-079 http://www.nrcresearchpress.com/doi/pdf/10.1139/e85-079 |
id |
crcansciencepubl:10.1139/e85-079 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e85-079 2024-09-15T18:12:24+00:00 Vashon Drift: definition of the formation in the Georgia Depression, southwest British Columbia Hicock, Stephen R. Armstrong, John E. 1985 http://dx.doi.org/10.1139/e85-079 http://www.nrcresearchpress.com/doi/pdf/10.1139/e85-079 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 22, issue 5, page 748-757 ISSN 0008-4077 1480-3313 journal-article 1985 crcansciencepubl https://doi.org/10.1139/e85-079 2024-08-01T04:10:00Z Vashon Drift was deposited during the Fraser Glaciation (late Wisconsinan) at the time of maximum expansion of the southwestern part of the Cordilleran ice sheet when it filled the Georgia Depression about 14 500 years ago. The drift is present throughout the depression and comprises till and glaciofluvial and glaciolacustrine sediments derived from source areas surrounding the coastal trough. It is overlain by Capilano Sediments and underlain by Quadra Sand, also of Fraser age. Drift deposition was diachronous and complex, probably caused by alpine glaciers coalescing in the trough with the ice margin repeatedly grounding and floating in seawater. Studies of bedrock striae, till fabrics, and clast provenance reveal that Vashon ice movement was generally southward, although locally controlled by topography. A time–space diagram is presented that confirms the long-held hypothesis that advance and decay of Vashon ice were rapid. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing Canadian Journal of Earth Sciences 22 5 748 757 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Vashon Drift was deposited during the Fraser Glaciation (late Wisconsinan) at the time of maximum expansion of the southwestern part of the Cordilleran ice sheet when it filled the Georgia Depression about 14 500 years ago. The drift is present throughout the depression and comprises till and glaciofluvial and glaciolacustrine sediments derived from source areas surrounding the coastal trough. It is overlain by Capilano Sediments and underlain by Quadra Sand, also of Fraser age. Drift deposition was diachronous and complex, probably caused by alpine glaciers coalescing in the trough with the ice margin repeatedly grounding and floating in seawater. Studies of bedrock striae, till fabrics, and clast provenance reveal that Vashon ice movement was generally southward, although locally controlled by topography. A time–space diagram is presented that confirms the long-held hypothesis that advance and decay of Vashon ice were rapid. |
format |
Article in Journal/Newspaper |
author |
Hicock, Stephen R. Armstrong, John E. |
spellingShingle |
Hicock, Stephen R. Armstrong, John E. Vashon Drift: definition of the formation in the Georgia Depression, southwest British Columbia |
author_facet |
Hicock, Stephen R. Armstrong, John E. |
author_sort |
Hicock, Stephen R. |
title |
Vashon Drift: definition of the formation in the Georgia Depression, southwest British Columbia |
title_short |
Vashon Drift: definition of the formation in the Georgia Depression, southwest British Columbia |
title_full |
Vashon Drift: definition of the formation in the Georgia Depression, southwest British Columbia |
title_fullStr |
Vashon Drift: definition of the formation in the Georgia Depression, southwest British Columbia |
title_full_unstemmed |
Vashon Drift: definition of the formation in the Georgia Depression, southwest British Columbia |
title_sort |
vashon drift: definition of the formation in the georgia depression, southwest british columbia |
publisher |
Canadian Science Publishing |
publishDate |
1985 |
url |
http://dx.doi.org/10.1139/e85-079 http://www.nrcresearchpress.com/doi/pdf/10.1139/e85-079 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 22, issue 5, page 748-757 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e85-079 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
22 |
container_issue |
5 |
container_start_page |
748 |
op_container_end_page |
757 |
_version_ |
1810449978025312256 |