Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 Myr

The six largest known impact craters of the last 250 Myr (≥70 km in diameter), which are capable of causing significant environmental damage, coincide with four times of recognized extinction events at 36 (with 2 craters), 66, and 145 Myr ago, and possibly with two provisional extinction events at 1...

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Main Authors:	Michael R. Rampino, Ken Caldeira
Format:	Article
Language:	English
Published:	Elsevier 2017-11-01
Series:	Geoscience Frontiers
Subjects:	Extinctions Impact craters Ejecta layers
Online Access:	http://www.sciencedirect.com/science/article/pii/S167498711730049X

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spelling	doaj-d1561142145e4df7bf9eb8ea25f575112020-11-24T22:34:16ZengElsevierGeoscience Frontiers1674-98712017-11-01861241124510.1016/j.gsf.2017.03.002Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 MyrMichael R. Rampino0Ken Caldeira1Department of Biology, New York University, 100 Washington Square East, New York, NY 10003, USACarnegie Institute for Science, Department of Global Ecology, 260 Panama St., Stanford, CA 94305, USAThe six largest known impact craters of the last 250 Myr (≥70 km in diameter), which are capable of causing significant environmental damage, coincide with four times of recognized extinction events at 36 (with 2 craters), 66, and 145 Myr ago, and possibly with two provisional extinction events at 168 and 215 Myr ago. These impact cratering events are accompanied by layers in the geologic record interpreted as impact ejecta. Chance occurrences of impacts and extinctions can be rejected at confidence levels of 99.96% (for 4 impact/extinctions) to 99.99% (for 6 impact/extinctions). These results argue that several extinction events over the last 250 Myr may be related to the effects of large-body impacts.http://www.sciencedirect.com/science/article/pii/S167498711730049XExtinctionsImpact cratersEjecta layers
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Michael R. Rampino Ken Caldeira
spellingShingle	Michael R. Rampino Ken Caldeira Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 Myr Geoscience Frontiers Extinctions Impact craters Ejecta layers
author_facet	Michael R. Rampino Ken Caldeira
author_sort	Michael R. Rampino
title	Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 Myr
title_short	Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 Myr
title_full	Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 Myr
title_fullStr	Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 Myr
title_full_unstemmed	Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 Myr
title_sort	correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 myr
publisher	Elsevier
series	Geoscience Frontiers
issn	1674-9871
publishDate	2017-11-01
description	The six largest known impact craters of the last 250 Myr (≥70 km in diameter), which are capable of causing significant environmental damage, coincide with four times of recognized extinction events at 36 (with 2 craters), 66, and 145 Myr ago, and possibly with two provisional extinction events at 168 and 215 Myr ago. These impact cratering events are accompanied by layers in the geologic record interpreted as impact ejecta. Chance occurrences of impacts and extinctions can be rejected at confidence levels of 99.96% (for 4 impact/extinctions) to 99.99% (for 6 impact/extinctions). These results argue that several extinction events over the last 250 Myr may be related to the effects of large-body impacts.
topic	Extinctions Impact craters Ejecta layers
url	http://www.sciencedirect.com/science/article/pii/S167498711730049X
work_keys_str_mv	AT michaelrrampino correlationofthelargestcratersstratigraphicimpactsignaturesandextinctioneventsoverthepast250myr AT kencaldeira correlationofthelargestcratersstratigraphicimpactsignaturesandextinctioneventsoverthepast250myr
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Correlation of the largest craters, stratigraphic impact signatures, and extinction events over the past 250 Myr

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