Blair Schoene, Jean Guex, Annachiara Bartolini, Urs Schaltegger, Terrence J. Blackburn; Correlating the end-Triassic mass extinction and flood basalt volcanism at the 100 ka level. Geology 2010; 38 (5): 387-390. doi: 10.1130/G30683.1
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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 δ13C 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.