Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada
Sharp-crested moraines, up to 120 m high and 9 km beyond Little Ice Age glacier limits, record a late Pleistocene advance of alpine glaciers in the Finlay River area in northern British Columbia. The moraines are regional in extent and record climatic deterioration near the end of the last glaciatio...
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Language: | English |
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Cambridge University Press (CUP)
2008
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Online Access: | http://dx.doi.org/10.1016/j.yqres.2008.01.002 http://api.elsevier.com/content/article/PII:S0033589408000112?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589408000112?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400014423 |
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crcambridgeupr:10.1016/j.yqres.2008.01.002 2024-06-23T07:53:46+00:00 Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada Lakeman, Thomas R. Clague, John J. Menounos, Brian 2008 http://dx.doi.org/10.1016/j.yqres.2008.01.002 http://api.elsevier.com/content/article/PII:S0033589408000112?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589408000112?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400014423 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 69, issue 2, page 188-200 ISSN 0033-5894 1096-0287 journal-article 2008 crcambridgeupr https://doi.org/10.1016/j.yqres.2008.01.002 2024-06-05T04:04:40Z Sharp-crested moraines, up to 120 m high and 9 km beyond Little Ice Age glacier limits, record a late Pleistocene advance of alpine glaciers in the Finlay River area in northern British Columbia. The moraines are regional in extent and record climatic deterioration near the end of the last glaciation. Several lateral moraines are crosscut by meltwater channels that record downwasting of trunk valley ice of the northern Cordilleran ice sheet. Other lateral moraines merge with ice-stagnation deposits in trunk valleys. These relationships confirm the interaction of advancing alpine glaciers with the regionally decaying Cordilleran ice sheet and verify a late-glacial age for the moraines. Sediment cores were collected from eight lakes dammed by the moraines. Two tephras occur in basal sediments of five lakes, demonstrating that the moraines are the same age. Plant macrofossils from sediment cores provide a minimum limiting age of 10,550–10,250 cal yr BP (9230±50 14 C yr BP) for abandonment of the moraines. The advance that left the moraines may date to the Younger Dryas period. The Finlay moraines demonstrate that the timing and style of regional deglaciation was important in determining the magnitude of late-glacial glacier advances. Article in Journal/Newspaper Ice Sheet Cambridge University Press Canada British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Finlay River ENVELOPE(-124.953,-124.953,56.900,56.900) Quaternary Research 69 2 188 200 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Sharp-crested moraines, up to 120 m high and 9 km beyond Little Ice Age glacier limits, record a late Pleistocene advance of alpine glaciers in the Finlay River area in northern British Columbia. The moraines are regional in extent and record climatic deterioration near the end of the last glaciation. Several lateral moraines are crosscut by meltwater channels that record downwasting of trunk valley ice of the northern Cordilleran ice sheet. Other lateral moraines merge with ice-stagnation deposits in trunk valleys. These relationships confirm the interaction of advancing alpine glaciers with the regionally decaying Cordilleran ice sheet and verify a late-glacial age for the moraines. Sediment cores were collected from eight lakes dammed by the moraines. Two tephras occur in basal sediments of five lakes, demonstrating that the moraines are the same age. Plant macrofossils from sediment cores provide a minimum limiting age of 10,550–10,250 cal yr BP (9230±50 14 C yr BP) for abandonment of the moraines. The advance that left the moraines may date to the Younger Dryas period. The Finlay moraines demonstrate that the timing and style of regional deglaciation was important in determining the magnitude of late-glacial glacier advances. |
format |
Article in Journal/Newspaper |
author |
Lakeman, Thomas R. Clague, John J. Menounos, Brian |
spellingShingle |
Lakeman, Thomas R. Clague, John J. Menounos, Brian Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada |
author_facet |
Lakeman, Thomas R. Clague, John J. Menounos, Brian |
author_sort |
Lakeman, Thomas R. |
title |
Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada |
title_short |
Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada |
title_full |
Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada |
title_fullStr |
Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada |
title_full_unstemmed |
Advance of alpine glaciers during final retreat of the Cordilleran ice sheet in the Finlay River area, northern British Columbia, Canada |
title_sort |
advance of alpine glaciers during final retreat of the cordilleran ice sheet in the finlay river area, northern british columbia, canada |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1016/j.yqres.2008.01.002 http://api.elsevier.com/content/article/PII:S0033589408000112?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589408000112?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400014423 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-124.953,-124.953,56.900,56.900) |
geographic |
Canada British Columbia Finlay River |
geographic_facet |
Canada British Columbia Finlay River |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Quaternary Research volume 69, issue 2, page 188-200 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2008.01.002 |
container_title |
Quaternary Research |
container_volume |
69 |
container_issue |
2 |
container_start_page |
188 |
op_container_end_page |
200 |
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1802645579932631040 |