Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT
This study presents new ages for the northwest section of the Laurentide Ice Sheet (LIS) glacial chronology from material recovered from two retrogressive thaw slumps exposed in the Richardson Mountains, Northwest Territories, Canada. One study site, located at the maximum glacial limit of the LIS i...
Published in: | Quaternary Research |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2013
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1016/j.yqres.2013.06.001 http://api.elsevier.com/content/article/PII:S0033589413000586?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589413000586?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400005962 |
id |
crcambridgeupr:10.1016/j.yqres.2013.06.001 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1016/j.yqres.2013.06.001 2024-06-23T07:50:30+00:00 Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT Lacelle, Denis Lauriol, Bernard Zazula, Grant Ghaleb, Bassam Utting, Nicholas Clark, Ian D. 2013 http://dx.doi.org/10.1016/j.yqres.2013.06.001 http://api.elsevier.com/content/article/PII:S0033589413000586?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589413000586?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400005962 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 80, issue 2, page 274-283 ISSN 0033-5894 1096-0287 journal-article 2013 crcambridgeupr https://doi.org/10.1016/j.yqres.2013.06.001 2024-05-29T08:08:34Z This study presents new ages for the northwest section of the Laurentide Ice Sheet (LIS) glacial chronology from material recovered from two retrogressive thaw slumps exposed in the Richardson Mountains, Northwest Territories, Canada. One study site, located at the maximum glacial limit of the LIS in the Richardson Mountains, had calcite concretions recovered from aufeis buried by glacial till that were dated by U/Th disequilibrium to 18,500 cal yr BP. The second site, located on the Peel Plateau to the east yielded a fossil horse ( Equus ) mandible that was radiocarbon dated to ca. 19,700 cal yr BP. These ages indicate that the Peel Plateau on the eastern flanks of the Richardson Mountains was glaciated only after 18,500 cal yr BP, which is later than previous models for the global last glacial maximum (LGM). As the LIS retreated the Peel Plateau around 15,000 cal yr BP, following the age of the Tutsieta phase, we conclude that the presence of the northwestern margin of the LIS at its maximum limit was a very short event in the western Canadian Arctic. Article in Journal/Newspaper Arctic Ice Sheet Northwest Territories Cambridge University Press Arctic Canada Northwest Territories Richardson Mountains ENVELOPE(-136.171,-136.171,67.000,67.000) Quaternary Research 80 2 274 283 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
This study presents new ages for the northwest section of the Laurentide Ice Sheet (LIS) glacial chronology from material recovered from two retrogressive thaw slumps exposed in the Richardson Mountains, Northwest Territories, Canada. One study site, located at the maximum glacial limit of the LIS in the Richardson Mountains, had calcite concretions recovered from aufeis buried by glacial till that were dated by U/Th disequilibrium to 18,500 cal yr BP. The second site, located on the Peel Plateau to the east yielded a fossil horse ( Equus ) mandible that was radiocarbon dated to ca. 19,700 cal yr BP. These ages indicate that the Peel Plateau on the eastern flanks of the Richardson Mountains was glaciated only after 18,500 cal yr BP, which is later than previous models for the global last glacial maximum (LGM). As the LIS retreated the Peel Plateau around 15,000 cal yr BP, following the age of the Tutsieta phase, we conclude that the presence of the northwestern margin of the LIS at its maximum limit was a very short event in the western Canadian Arctic. |
format |
Article in Journal/Newspaper |
author |
Lacelle, Denis Lauriol, Bernard Zazula, Grant Ghaleb, Bassam Utting, Nicholas Clark, Ian D. |
spellingShingle |
Lacelle, Denis Lauriol, Bernard Zazula, Grant Ghaleb, Bassam Utting, Nicholas Clark, Ian D. Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT |
author_facet |
Lacelle, Denis Lauriol, Bernard Zazula, Grant Ghaleb, Bassam Utting, Nicholas Clark, Ian D. |
author_sort |
Lacelle, Denis |
title |
Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT |
title_short |
Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT |
title_full |
Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT |
title_fullStr |
Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT |
title_full_unstemmed |
Timing of advance and basal condition of the Laurentide Ice Sheet during the last glacial maximum in the Richardson Mountains, NWT |
title_sort |
timing of advance and basal condition of the laurentide ice sheet during the last glacial maximum in the richardson mountains, nwt |
publisher |
Cambridge University Press (CUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1016/j.yqres.2013.06.001 http://api.elsevier.com/content/article/PII:S0033589413000586?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589413000586?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400005962 |
long_lat |
ENVELOPE(-136.171,-136.171,67.000,67.000) |
geographic |
Arctic Canada Northwest Territories Richardson Mountains |
geographic_facet |
Arctic Canada Northwest Territories Richardson Mountains |
genre |
Arctic Ice Sheet Northwest Territories |
genre_facet |
Arctic Ice Sheet Northwest Territories |
op_source |
Quaternary Research volume 80, issue 2, page 274-283 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2013.06.001 |
container_title |
Quaternary Research |
container_volume |
80 |
container_issue |
2 |
container_start_page |
274 |
op_container_end_page |
283 |
_version_ |
1802641405033578496 |