Impact event at the permian-triassic boundary: Evidence from extraterrestrial noble gases in fullerenes

L. Becker, R. J. Poreda, A. G. Hunt, T. E. Bunch, M. Rampino

Research output: Contribution to journalArticle

Abstract

The Permian-Triassic boundary (PTB) event, which occurred about 251.4 million years ago, is marked by the most severe mass extinction in the geologic record. Recent studies of some PTB sites indicate that the extinctions occurred very abruptly, consistent with a catastrophic, possibly extraterrestrial, cause. Fullerenes (C60 to C200) from sediments at the PTB contain trapped helium and argon with isotope ratios similar to the planetary component of carbonaceous chondrites. These data imply that an impact event (asteroidal or cometary) accompanied the extinction, as was the case for the Cretaceous-Tertiary extinction event about 65 million years ago.

Original languageEnglish (US)
Pages (from-to)1530-1533
Number of pages4
JournalScience
Volume291
Issue number5508
DOIs
StatePublished - Feb 23 2001

ASJC Scopus subject areas

  • General

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