University College, London | 2020 Jan 16
Volcanic activity did not play a direct role in the mass extinction event that killed the dinosaurs and about 75 per cent of Earth’s species 66 million years ago, according to a team involving UCL and University of Southampton researchers.
Two planetary-scale disturbances occurred within less than a million years of one another, leading scientists to question the role each played in driving the mass extinction event: An asteroid more than 10 km in diameter collided with the Yucatan Peninsula in Mexico creating the 200 km wide Chicxulub impact crater and around the same time about 500,000 km3 of lava flooded across much of India and into the deep sea forming the Deccan Traps, one of the largest volcanic features on Earth.
In a Yale-led study, published today in Science, analysis of marine fossils and climate models shows that the major release of volcanic gasses, thought by some to contribute to the extinction, happened about 200,000 years before the asteroid impact, making the asteroid the sole driver of the extinction event. ...
In death of dinosaurs, it was all about the asteroid — not volcanoes
Yale University | 2020 Jan 16
On impact and volcanism across the Cretaceous-Paleogene boundary ~ Pincelli M. Hull et al
- Science 367(6475):266 (17 Jan 2020) DOI: 10.1126/science.aay5055