A Reassessment of U-Th and 14 C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California
U-Th isochron ages of tufas formed on shorelines suggest that the last pluvial event in Lake Lahontan and Searles Lake was synchronous at about 16,500 cal yr B.P. (equivalent to a radiocarbon age of between 14,000 and 13,500 yr B.P.), whereas the timing of this pluvial event determined by radiocarbo...
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Cambridge University Press (CUP)
1998
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crcambridgeupr:10.1006/qres.1997.1949 2024-06-09T07:45:33+00:00 A Reassessment of U-Th and 14 C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California Lin, Jo C. Broecker, Wallace S. Hemming, Sidney R. Hajdas, Irena Anderson, Robert F. Smith, George I. Kelley, Maxwell Bonani, Georges 1998 http://dx.doi.org/10.1006/qres.1997.1949 http://api.elsevier.com/content/article/PII:S0033589497919499?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589497919499?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400038783 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 49, issue 1, page 11-23 ISSN 0033-5894 1096-0287 journal-article 1998 crcambridgeupr https://doi.org/10.1006/qres.1997.1949 2024-05-15T13:08:05Z U-Th isochron ages of tufas formed on shorelines suggest that the last pluvial event in Lake Lahontan and Searles Lake was synchronous at about 16,500 cal yr B.P. (equivalent to a radiocarbon age of between 14,000 and 13,500 yr B.P.), whereas the timing of this pluvial event determined by radiocarbon dating is on the order of 1000 yr younger. The timing of seven distinct periods of near desiccation in Searles Lake during late-glacial time has been reinvestigated for U-Th age determination by mass spectrometry. U-Th dating of evaporite layers in the interbedded mud and salt unit called the Lower Salt in Searles Lake was hampered by the uncertainty in assessing the initial 230 Th/ 232 Th of the samples. The resulting ages, corrected by a conservative range of initial 230 Th/ 232 Th ratios, suggest close correlation of the abrupt changes recorded in Greenland ice cores (Dansgaard-Oeschger events) and wet–dry conditions in Searles Lake between 35,000 and 24,000 cal yr B.P. Article in Journal/Newspaper Dansgaard-Oeschger events Greenland Greenland ice cores Cambridge University Press Greenland Quaternary Research 49 1 11 23 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
U-Th isochron ages of tufas formed on shorelines suggest that the last pluvial event in Lake Lahontan and Searles Lake was synchronous at about 16,500 cal yr B.P. (equivalent to a radiocarbon age of between 14,000 and 13,500 yr B.P.), whereas the timing of this pluvial event determined by radiocarbon dating is on the order of 1000 yr younger. The timing of seven distinct periods of near desiccation in Searles Lake during late-glacial time has been reinvestigated for U-Th age determination by mass spectrometry. U-Th dating of evaporite layers in the interbedded mud and salt unit called the Lower Salt in Searles Lake was hampered by the uncertainty in assessing the initial 230 Th/ 232 Th of the samples. The resulting ages, corrected by a conservative range of initial 230 Th/ 232 Th ratios, suggest close correlation of the abrupt changes recorded in Greenland ice cores (Dansgaard-Oeschger events) and wet–dry conditions in Searles Lake between 35,000 and 24,000 cal yr B.P. |
format |
Article in Journal/Newspaper |
author |
Lin, Jo C. Broecker, Wallace S. Hemming, Sidney R. Hajdas, Irena Anderson, Robert F. Smith, George I. Kelley, Maxwell Bonani, Georges |
spellingShingle |
Lin, Jo C. Broecker, Wallace S. Hemming, Sidney R. Hajdas, Irena Anderson, Robert F. Smith, George I. Kelley, Maxwell Bonani, Georges A Reassessment of U-Th and 14 C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California |
author_facet |
Lin, Jo C. Broecker, Wallace S. Hemming, Sidney R. Hajdas, Irena Anderson, Robert F. Smith, George I. Kelley, Maxwell Bonani, Georges |
author_sort |
Lin, Jo C. |
title |
A Reassessment of U-Th and 14 C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California |
title_short |
A Reassessment of U-Th and 14 C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California |
title_full |
A Reassessment of U-Th and 14 C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California |
title_fullStr |
A Reassessment of U-Th and 14 C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California |
title_full_unstemmed |
A Reassessment of U-Th and 14 C Ages for Late-Glacial High-Frequency Hydrological Events at Searles Lake, California |
title_sort |
reassessment of u-th and 14 c ages for late-glacial high-frequency hydrological events at searles lake, california |
publisher |
Cambridge University Press (CUP) |
publishDate |
1998 |
url |
http://dx.doi.org/10.1006/qres.1997.1949 http://api.elsevier.com/content/article/PII:S0033589497919499?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589497919499?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400038783 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Dansgaard-Oeschger events Greenland Greenland ice cores |
genre_facet |
Dansgaard-Oeschger events Greenland Greenland ice cores |
op_source |
Quaternary Research volume 49, issue 1, page 11-23 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1006/qres.1997.1949 |
container_title |
Quaternary Research |
container_volume |
49 |
container_issue |
1 |
container_start_page |
11 |
op_container_end_page |
23 |
_version_ |
1801374970379501568 |