Stratigraphy and Paleoecology of Pleistocene Interstadial Sediments, Central British Columbia
Abstract Two exposures of organic-rich interstadial sediments in central British Columbia provide information on middle Wisconsinan environments and climates near the center of the region subsequently covered by the late Wisconsinan Cordilleran Ice Sheet. Interstadial sediments at Bullion Pit overli...
Published in: | Quaternary Research |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1990
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1016/0033-5894(90)90032-g http://api.elsevier.com/content/article/PII:003358949090032G?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949090032G?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400020949 |
id |
crcambridgeupr:10.1016/0033-5894(90)90032-g |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1016/0033-5894(90)90032-g 2024-09-09T19:45:24+00:00 Stratigraphy and Paleoecology of Pleistocene Interstadial Sediments, Central British Columbia Clague, John J. Hebda, Richard J. Mathewes, Rolf W. 1990 http://dx.doi.org/10.1016/0033-5894(90)90032-g http://api.elsevier.com/content/article/PII:003358949090032G?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949090032G?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400020949 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 34, issue 2, page 208-226 ISSN 0033-5894 1096-0287 journal-article 1990 crcambridgeupr https://doi.org/10.1016/0033-5894(90)90032-g 2024-07-31T04:01:02Z Abstract Two exposures of organic-rich interstadial sediments in central British Columbia provide information on middle Wisconsinan environments and climates near the center of the region subsequently covered by the late Wisconsinan Cordilleran Ice Sheet. Interstadial sediments at Bullion Pit overlie drift of early Wisconsinan or older age and underlie thick drift of late Wisconsinan age. Alluvium (or colluvium) and peat were deposited on the floor of the ancestral Quesnel River valley 46,000–40,000 14 C yr ago when the vegetation consisted of spruce forest with dry openings and local fens and the climate was colder and perhaps drier than today. This is broadly consistent with paleoclimatic reconstructions for the same time interval for Babine Lake, 400 km to the northwest, and for Meadow Creek, 400 km to the southeast. Plant-rich pond sediments containing tephra layers and vertebrate remains are exposed between two drifts in a ravine at Mexican Hill, 30 km east of Quesnel. Although they may be contemporaneous with the Bullion Pit beds, the nonglacial sediments at Mexican Hill more likely were deposited sometime after the warmest part of the last interglaciation, but prior to 50,000 yr B.P. At that time, the vegetation at Mexican Hill probably was parkland. The present vegetation at Mexican Hill is boreal forest; thus, a drier and possibly cooler climate is indicated. Article in Journal/Newspaper Ice Sheet Cambridge University Press Parkland ENVELOPE(-120.570,-120.570,55.917,55.917) Babine Lake ENVELOPE(-126.014,-126.014,54.776,54.776) Quaternary Research 34 2 208 226 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Two exposures of organic-rich interstadial sediments in central British Columbia provide information on middle Wisconsinan environments and climates near the center of the region subsequently covered by the late Wisconsinan Cordilleran Ice Sheet. Interstadial sediments at Bullion Pit overlie drift of early Wisconsinan or older age and underlie thick drift of late Wisconsinan age. Alluvium (or colluvium) and peat were deposited on the floor of the ancestral Quesnel River valley 46,000–40,000 14 C yr ago when the vegetation consisted of spruce forest with dry openings and local fens and the climate was colder and perhaps drier than today. This is broadly consistent with paleoclimatic reconstructions for the same time interval for Babine Lake, 400 km to the northwest, and for Meadow Creek, 400 km to the southeast. Plant-rich pond sediments containing tephra layers and vertebrate remains are exposed between two drifts in a ravine at Mexican Hill, 30 km east of Quesnel. Although they may be contemporaneous with the Bullion Pit beds, the nonglacial sediments at Mexican Hill more likely were deposited sometime after the warmest part of the last interglaciation, but prior to 50,000 yr B.P. At that time, the vegetation at Mexican Hill probably was parkland. The present vegetation at Mexican Hill is boreal forest; thus, a drier and possibly cooler climate is indicated. |
format |
Article in Journal/Newspaper |
author |
Clague, John J. Hebda, Richard J. Mathewes, Rolf W. |
spellingShingle |
Clague, John J. Hebda, Richard J. Mathewes, Rolf W. Stratigraphy and Paleoecology of Pleistocene Interstadial Sediments, Central British Columbia |
author_facet |
Clague, John J. Hebda, Richard J. Mathewes, Rolf W. |
author_sort |
Clague, John J. |
title |
Stratigraphy and Paleoecology of Pleistocene Interstadial Sediments, Central British Columbia |
title_short |
Stratigraphy and Paleoecology of Pleistocene Interstadial Sediments, Central British Columbia |
title_full |
Stratigraphy and Paleoecology of Pleistocene Interstadial Sediments, Central British Columbia |
title_fullStr |
Stratigraphy and Paleoecology of Pleistocene Interstadial Sediments, Central British Columbia |
title_full_unstemmed |
Stratigraphy and Paleoecology of Pleistocene Interstadial Sediments, Central British Columbia |
title_sort |
stratigraphy and paleoecology of pleistocene interstadial sediments, central british columbia |
publisher |
Cambridge University Press (CUP) |
publishDate |
1990 |
url |
http://dx.doi.org/10.1016/0033-5894(90)90032-g http://api.elsevier.com/content/article/PII:003358949090032G?httpAccept=text/xml http://api.elsevier.com/content/article/PII:003358949090032G?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400020949 |
long_lat |
ENVELOPE(-120.570,-120.570,55.917,55.917) ENVELOPE(-126.014,-126.014,54.776,54.776) |
geographic |
Parkland Babine Lake |
geographic_facet |
Parkland Babine Lake |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Quaternary Research volume 34, issue 2, page 208-226 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/0033-5894(90)90032-g |
container_title |
Quaternary Research |
container_volume |
34 |
container_issue |
2 |
container_start_page |
208 |
op_container_end_page |
226 |
_version_ |
1809914999851712512 |