Research
Courtillot favors the hypothesis that major mass extinctions are caused by massive episodes of vulcanism: that the Permian-Triassic (P/T) extinction that ended the Paleozoic Era was caused by the Siberian Traps eruption, and the Cretaceous–Paleogene extinction event that ended the Mesozoic Era was caused by the Deccan Traps vulcanism in India. His position is generally in opposition to the hypothesis famously championed by Luis Alvarez and Walter Alvarez, that the K/T extinction that saw the end of the dinosaurs was primarily due to the asteroid impact at Chicxulub on the Yucatan Peninsula. However, Courtillot does not dispute the scientifically-determined facts of the Chicxulub impact; rather, he argues that the totality of the available evidence supports a thesis that mass extinctions are generally caused by volcanic action.
Read more about this topic: Vincent Courtillot
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