Extreme volcanism did not cause the massive extinction of species in the late Cretaceous

A new study rules out that extreme volcanic episodes had any influence on the massive extinction of species in the late Cretaceous. The results confirm the hypothesis that it was a giant meteorite impact what caused the great biological crisis that ended up with the non-avian dinosaur lineages and other marine and terrestrial organisms 66 million years ago.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/09/210920111404.htm