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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ftcdlib:oai:escholarship.org:ark:/13030/qt4r15q5r9 2023-09-05T13:19:53+02:00 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 Emili Aura Bischoff, James L Bunch, Ted E Daniel, I Randolph Erlandson, Jon M Ferraro, David Firestone, Richard B Goodyear, Albert C Israde-Alcántara, Isabel Johnson, John R Pardo, Jesús F Jordá Kimbel, David R LeCompte, Malcolm A Lopinot, Neal H Mahaney, William C Moore, Andrew MT Moore, Christopher R Ray, Jack H Stafford, Thomas W Tankersley, Kenneth Barnett Wittke, James H Wolbach, Wendy S West, Allen e4344 - e4353 2015-08-11 application/pdf https://escholarship.org/uc/item/4r15q5r9 unknown eScholarship, University of California qt4r15q5r9 https://escholarship.org/uc/item/4r15q5r9 public Proceedings of the National Academy of Sciences of the United States of America, vol 112, iss 32 Younger Dryas comet Bayesian radiocarbon synchroneity article 2015 ftcdlib 2023-08-21T18:05:17Z 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 12,835-12,735 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. Article in Journal/Newspaper Greenland Ice Sheet University of California: eScholarship Greenland |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
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 Emili Aura Bischoff, James L Bunch, Ted E Daniel, I Randolph Erlandson, Jon M Ferraro, David Firestone, Richard B Goodyear, Albert C Israde-Alcántara, Isabel Johnson, John R Pardo, Jesús F Jordá Kimbel, David R LeCompte, Malcolm A Lopinot, Neal H Mahaney, William C Moore, Andrew MT Moore, Christopher R Ray, Jack H Stafford, Thomas W Tankersley, Kenneth Barnett Wittke, James H Wolbach, Wendy S West, Allen 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 12,835-12,735 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 |
Article in Journal/Newspaper |
author |
Kennett, James P Kennett, Douglas J Culleton, Brendan J Tortosa, J Emili Aura Bischoff, James L Bunch, Ted E Daniel, I Randolph Erlandson, Jon M Ferraro, David Firestone, Richard B Goodyear, Albert C Israde-Alcántara, Isabel Johnson, John R Pardo, Jesús F Jordá Kimbel, David R LeCompte, Malcolm A Lopinot, Neal H Mahaney, William C Moore, Andrew MT Moore, Christopher R Ray, Jack H Stafford, Thomas W Tankersley, Kenneth Barnett Wittke, James H Wolbach, Wendy S West, Allen |
author_facet |
Kennett, James P Kennett, Douglas J Culleton, Brendan J Tortosa, J Emili Aura Bischoff, James L Bunch, Ted E Daniel, I Randolph Erlandson, Jon M Ferraro, David Firestone, Richard B Goodyear, Albert C Israde-Alcántara, Isabel Johnson, John R Pardo, Jesús F Jordá Kimbel, David R LeCompte, Malcolm A Lopinot, Neal H Mahaney, William C Moore, Andrew MT Moore, Christopher R Ray, Jack H Stafford, Thomas W Tankersley, Kenneth Barnett Wittke, James H Wolbach, Wendy S West, Allen |
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 |
eScholarship, University of California |
publishDate |
2015 |
url |
https://escholarship.org/uc/item/4r15q5r9 |
op_coverage |
e4344 - e4353 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Proceedings of the National Academy of Sciences of the United States of America, vol 112, iss 32 |
op_relation |
qt4r15q5r9 https://escholarship.org/uc/item/4r15q5r9 |
op_rights |
public |
_version_ |
1776200675806412800 |