Bayesian Chronological Analyses Consistent with Synchronous Age of 12,835-12,735 cal B.P. for Younger Dryas Boundary on Four Continents
The Younger Dryas impact hypothesis posits that a cosmic impact across much of the Northern Hemisphere deposited the Younger Dryas boundary (YDB) layer, containing peak abundances in a variable assemblage of proxies, including magnetic and glassy impact-related spherules, high-temperature minerals a...
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ftmissouristuniv:oai:bearworks.missouristate.edu:articles-chpa-1012 2024-09-15T18:09:51+00:00 Bayesian Chronological Analyses Consistent with Synchronous Age of 12,835-12,735 cal B.P. for Younger Dryas Boundary on Four Continents Kennett, James P Kennett, Douglas J. Culleton, Brendan J. Tortosa, J. Emil Aura Bischoff, James L. Daniel, Randolph Lopinot, Neal H. Ray, Jack H. For complete list of authors, see publisher's website. 2015-01-01T08:00:00Z https://bearworks.missouristate.edu/articles-chpa/13 https://doi.org/10.1073/pnas.1507146112 unknown BearWorks https://bearworks.missouristate.edu/articles-chpa/13 doi:10.1073/pnas.1507146112 https://doi.org/10.1073/pnas.1507146112 College of Humanities and Public Affairs younger dryas comet bayesian radiocarbon synchroneity text 2015 ftmissouristuniv https://doi.org/10.1073/pnas.1507146112 2024-07-19T03:16:33Z The Younger Dryas impact hypothesis posits that a cosmic impact across much of the Northern Hemisphere deposited the Younger Dryas boundary (YDB) layer, containing peak abundances in a variable assemblage of proxies, including magnetic and glassy impact-related spherules, high-temperature minerals and melt glass, nanodiamonds, carbon spherules, aciniform carbon, platinum, and osmium. Bayesian chronological modeling was applied to 354 dates from 23 stratigraphic sections in 12 countries on four continents to establish a modeled YDB age range for this event of 12,835 Cal B.P. - 12,735 Cal B.P. at 95% probability. This range overlaps that of a peak in extraterrestrial platinum in the Greenland Ice Sheet and of the earliest age of the Younger Dryas climate episode in six proxy records, suggesting a causal connection between the YDB impact event and the Younger Dryas. Two statistical tests indicate that both modeled and unmodeled ages in the 30 records are consistent with synchronous deposition of the YDB layer within the limits of dating uncertainty (~ 100 y). The widespread distribution of the YDB layer suggests that it may serve as a datum layer. Text Greenland Ice Sheet Missouri State University: BearWorks Proceedings of the National Academy of Sciences 112 32 E4344 E4353 |
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Missouri State University: BearWorks |
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topic |
younger dryas comet bayesian radiocarbon synchroneity |
spellingShingle |
younger dryas comet bayesian radiocarbon synchroneity Kennett, James P Kennett, Douglas J. Culleton, Brendan J. Tortosa, J. Emil Aura Bischoff, James L. Daniel, Randolph Lopinot, Neal H. Ray, Jack H. For complete list of authors, see publisher's website. Bayesian Chronological Analyses Consistent with Synchronous Age of 12,835-12,735 cal B.P. for Younger Dryas Boundary on Four Continents |
topic_facet |
younger dryas comet bayesian radiocarbon synchroneity |
description |
The Younger Dryas impact hypothesis posits that a cosmic impact across much of the Northern Hemisphere deposited the Younger Dryas boundary (YDB) layer, containing peak abundances in a variable assemblage of proxies, including magnetic and glassy impact-related spherules, high-temperature minerals and melt glass, nanodiamonds, carbon spherules, aciniform carbon, platinum, and osmium. Bayesian chronological modeling was applied to 354 dates from 23 stratigraphic sections in 12 countries on four continents to establish a modeled YDB age range for this event of 12,835 Cal B.P. - 12,735 Cal B.P. at 95% probability. This range overlaps that of a peak in extraterrestrial platinum in the Greenland Ice Sheet and of the earliest age of the Younger Dryas climate episode in six proxy records, suggesting a causal connection between the YDB impact event and the Younger Dryas. Two statistical tests indicate that both modeled and unmodeled ages in the 30 records are consistent with synchronous deposition of the YDB layer within the limits of dating uncertainty (~ 100 y). The widespread distribution of the YDB layer suggests that it may serve as a datum layer. |
format |
Text |
author |
Kennett, James P Kennett, Douglas J. Culleton, Brendan J. Tortosa, J. Emil Aura Bischoff, James L. Daniel, Randolph Lopinot, Neal H. Ray, Jack H. For complete list of authors, see publisher's website. |
author_facet |
Kennett, James P Kennett, Douglas J. Culleton, Brendan J. Tortosa, J. Emil Aura Bischoff, James L. Daniel, Randolph Lopinot, Neal H. Ray, Jack H. For complete list of authors, see publisher's website. |
author_sort |
Kennett, James P |
title |
Bayesian Chronological Analyses Consistent with Synchronous Age of 12,835-12,735 cal B.P. for Younger Dryas Boundary on Four Continents |
title_short |
Bayesian Chronological Analyses Consistent with Synchronous Age of 12,835-12,735 cal B.P. for Younger Dryas Boundary on Four Continents |
title_full |
Bayesian Chronological Analyses Consistent with Synchronous Age of 12,835-12,735 cal B.P. for Younger Dryas Boundary on Four Continents |
title_fullStr |
Bayesian Chronological Analyses Consistent with Synchronous Age of 12,835-12,735 cal B.P. for Younger Dryas Boundary on Four Continents |
title_full_unstemmed |
Bayesian Chronological Analyses Consistent with Synchronous Age of 12,835-12,735 cal B.P. for Younger Dryas Boundary on Four Continents |
title_sort |
bayesian chronological analyses consistent with synchronous age of 12,835-12,735 cal b.p. for younger dryas boundary on four continents |
publisher |
BearWorks |
publishDate |
2015 |
url |
https://bearworks.missouristate.edu/articles-chpa/13 https://doi.org/10.1073/pnas.1507146112 |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
College of Humanities and Public Affairs |
op_relation |
https://bearworks.missouristate.edu/articles-chpa/13 doi:10.1073/pnas.1507146112 https://doi.org/10.1073/pnas.1507146112 |
op_doi |
https://doi.org/10.1073/pnas.1507146112 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
112 |
container_issue |
32 |
container_start_page |
E4344 |
op_container_end_page |
E4353 |
_version_ |
1810447439394504704 |