Wisconsin Glaciation of the Sierra Nevada (79,000–15,000 yr B.P.) as Recorded by Rock Flour in Sediments of Owens Lake, California
Abstract Chemical analyses of the clay-sized fractions of 564 continuous sediment samples (200-yr resolution) from composite core OL90/92 allow quantification of an abundance of glacial rock flour. Rock flour produced during glacier advances is represented by clay-sized plagioclase, K-feldspar, and...
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Cambridge University Press (CUP)
2001
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Online Access: | http://dx.doi.org/10.1006/qres.2000.2183 http://api.elsevier.com/content/article/PII:S0033589400921835?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589400921835?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400028131 |
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crcambridgeupr:10.1006/qres.2000.2183 2024-06-09T07:48:04+00:00 Wisconsin Glaciation of the Sierra Nevada (79,000–15,000 yr B.P.) as Recorded by Rock Flour in Sediments of Owens Lake, California Bischoff, James L. Cummins, Kathleen 2001 http://dx.doi.org/10.1006/qres.2000.2183 http://api.elsevier.com/content/article/PII:S0033589400921835?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589400921835?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400028131 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 55, issue 1, page 14-24 ISSN 0033-5894 1096-0287 journal-article 2001 crcambridgeupr https://doi.org/10.1006/qres.2000.2183 2024-05-15T13:13:46Z Abstract Chemical analyses of the clay-sized fractions of 564 continuous sediment samples (200-yr resolution) from composite core OL90/92 allow quantification of an abundance of glacial rock flour. Rock flour produced during glacier advances is represented by clay-sized plagioclase, K-feldspar, and biotite in homogeneous internal composition. The abundance of rock flour is deemed proportional to the intensity of glacies advances. Age control for the composite section is provided by combining previously published radiocarbon dates on organics, U/Th dates on ostracode shells, and U/Th dates on saline minerals from nearby Searles Lake correlated to OL92 by pollen. The rock flour record displays three levels of variability: (1) a dominant one of about 20,000 yr related to summer insolation and precipitation; (2) an intermediate one of 3000–5000 yr, perhaps related to North Atlantic Heinrich events; and (3) a minor one of 1000–2000 yr, perhaps related to North Atlantic thermohaline-driven air-temperature variation. Article in Journal/Newspaper North Atlantic Cambridge University Press Quaternary Research 55 1 14 24 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Chemical analyses of the clay-sized fractions of 564 continuous sediment samples (200-yr resolution) from composite core OL90/92 allow quantification of an abundance of glacial rock flour. Rock flour produced during glacier advances is represented by clay-sized plagioclase, K-feldspar, and biotite in homogeneous internal composition. The abundance of rock flour is deemed proportional to the intensity of glacies advances. Age control for the composite section is provided by combining previously published radiocarbon dates on organics, U/Th dates on ostracode shells, and U/Th dates on saline minerals from nearby Searles Lake correlated to OL92 by pollen. The rock flour record displays three levels of variability: (1) a dominant one of about 20,000 yr related to summer insolation and precipitation; (2) an intermediate one of 3000–5000 yr, perhaps related to North Atlantic Heinrich events; and (3) a minor one of 1000–2000 yr, perhaps related to North Atlantic thermohaline-driven air-temperature variation. |
format |
Article in Journal/Newspaper |
author |
Bischoff, James L. Cummins, Kathleen |
spellingShingle |
Bischoff, James L. Cummins, Kathleen Wisconsin Glaciation of the Sierra Nevada (79,000–15,000 yr B.P.) as Recorded by Rock Flour in Sediments of Owens Lake, California |
author_facet |
Bischoff, James L. Cummins, Kathleen |
author_sort |
Bischoff, James L. |
title |
Wisconsin Glaciation of the Sierra Nevada (79,000–15,000 yr B.P.) as Recorded by Rock Flour in Sediments of Owens Lake, California |
title_short |
Wisconsin Glaciation of the Sierra Nevada (79,000–15,000 yr B.P.) as Recorded by Rock Flour in Sediments of Owens Lake, California |
title_full |
Wisconsin Glaciation of the Sierra Nevada (79,000–15,000 yr B.P.) as Recorded by Rock Flour in Sediments of Owens Lake, California |
title_fullStr |
Wisconsin Glaciation of the Sierra Nevada (79,000–15,000 yr B.P.) as Recorded by Rock Flour in Sediments of Owens Lake, California |
title_full_unstemmed |
Wisconsin Glaciation of the Sierra Nevada (79,000–15,000 yr B.P.) as Recorded by Rock Flour in Sediments of Owens Lake, California |
title_sort |
wisconsin glaciation of the sierra nevada (79,000–15,000 yr b.p.) as recorded by rock flour in sediments of owens lake, california |
publisher |
Cambridge University Press (CUP) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1006/qres.2000.2183 http://api.elsevier.com/content/article/PII:S0033589400921835?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589400921835?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400028131 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Quaternary Research volume 55, issue 1, page 14-24 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1006/qres.2000.2183 |
container_title |
Quaternary Research |
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55 |
container_issue |
1 |
container_start_page |
14 |
op_container_end_page |
24 |
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1801379636905508864 |