A lava flood in India may have helped finish off the dinosaurs

Around 66 million years ago, colossal eruptions in what is now western India buried an area the size of France under lava, with some flows piling up more than 2 km thick. The eruptions released huge pulses of carbon dioxide and sulfur that warmed and then cooled the climate in the few hundred thousand years surrounding the Chicxulub asteroid impact. Scientists still debate how much each event contributed to the extinction that ended the dinosaurs.

— Wikipedia contributors, Deccan Traps — Western India; main eruptions c. 66 million years ago