作者: Peter Schulte , Laia Alegret , Ignacio Arenillas , José A Arz , Penny J Barton
关键词:
摘要: The Cretaceous-Paleogene boundary similar to 65.5 million years ago marks one of the three largest mass extinctions in past 500 years. extinction event coincided with a large asteroid impact at Chicxulub, Mexico, and occurred within time Deccan flood basalt volcanism India. Here, we synthesize records global stratigraphy across this assess proposed causes extinction. Notably, single ejecta-rich deposit compositionally linked Chicxulub is globally distributed boundary. temporal match between ejecta layer onset agreement ecological patterns fossil record modeled environmental perturbations (for example, darkness cooling) lead us conclude that triggered