Massive perturbations to atmospheric sulfur in the aftermath of the Chicxulub impact

Christopher K. Junium, Aubrey L. Zerkle, James D. Witts, Linda C. Ivany, Thomas E. Yancey, Chengjie Liu, Mark W. Claire

Research output: Contribution to journalArticlepeer-review

Abstract

SignificanceSulfur isotopes confirm a key role for atmospheric sulfur gases in climatic cooling, mass extinction, and the demise of dinosaurs and other global biota after the Chicxulub bolide impact at the Cretaceous-Paleogene boundary. The sulfur isotope anomalies are confined to beds containing ejecta and, in the immediately overlying sediments, are temporally unrelated to known episodes of volcanism that also bracket this event, further addressing the controversial role of the Deccan Traps in the extinction.

Original languageEnglish (US)
Pages (from-to)e2119194119
JournalProceedings of the National Academy of Sciences of the United States of America
Volume119
Issue number14
DOIs
StatePublished - Apr 5 2022

Keywords

  • K-Pg extinction
  • mass extinction
  • mass-independent fractionation
  • sulfur cycle
  • sulfur isotopes

ASJC Scopus subject areas

  • General

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