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Scientific article
English

Correlating the end-Triassic mass extinction and flood basalt volcanism at the 100 ka level

Published inGeology, vol. 38, no. 5, p. 387-390
Publication date2010
Abstract

New high-precision U/Pb geochronology from volcanic ashes shows that the Triassic-Jurassic boundary and end-Triassic biological crisis from two independent marine stratigraphic sections correlate with the onset of terrestrial flood volcanism in the Central Atlantic Magmatic Province to <150 ka. This narrows the correlation between volcanism and mass extinction by an order of magnitude for any such catastrophe in Earth history. We also show that a concomitant drop and rise in sea level and negative delta(13)C spike in the very latest Triassic occurred locally in <290 ka. Such rapid sea-level fluctuations on a global scale require that global cooling and glaciation were closely associated with the end-Triassic extinction and potentially driven by Central Atlantic Magmatic Province volcanism

Keywords
  • Atlantic magmatic province
  • Carbon-isotope stratigraphy
  • Jurassic boundary
  • Triassic/jurassic boundary
  • Age constraints
  • Zircon
  • Record
  • Synchrony
  • Event
  • Differentiation
Citation (ISO format)
SCHOENE, B. et al. Correlating the end-Triassic mass extinction and flood basalt volcanism at the 100 ka level. In: Geology, 2010, vol. 38, n° 5, p. 387–390. doi: 10.1130/G30683.1
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ISSN of the journal1943-2682
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