Unveiling the Deccan Dilemma: Volcanic Eruption and the Mass Extinction Conundrum

New research uncovers the significant role of Deccan Plateau volcanic eruptions towards the end of the Maastrichtian era in environmental toxicity that led to a mass extinction event 66 million years ago. With 70% of lavas erupting before the Cretaceous-Paleogene boundary, these findings reshape the understanding of ancient volcanic impact.

Recent findings shed light on India's Deccan Plateau, where researchers have determined a substantial volcanic eruption near the end of the Maastrichtian era contributed immensely to the environmental changes 66 million years ago. This insight redefines past theories about this cataclysmic event's role in shaping the Earth's history.

Published in The Geological Society of America Bulletin, the study highlights that 70% of volcanic activity in this region occurred just before the Cretaceous-Paleogene boundary. This timeframe correlates with significant environmental toxicity leading to the mass extinction that eliminated non-avian dinosaurs, pterosaurs, and numerous marine organisms.

Collating paleomagnetic, geochronology, and paleontological data, scientists reveal these eruptions released hazardous gases over a span of 700,000 years, with a critical phase 300,000 years pre-dating the Cretaceous-Paleogene boundary. This work concludes the late Maastrichtian volcanism was a considerable factor in the terminal Cretaceous mass extinction event.

(With inputs from agencies.)