Worth reading When Life Almost Died, Michael Benton, to understand how hard it was for paleontologists to understand this. Also there's some evidence that the

Worth reading When Life Almost Died, Michael Benton, to understand how hard it was for paleontologists to understand this. Also there's some evidence that the Siberian Traps volcanism burned a coal deposit: https://www.nature.com/articles/ngeo1069 https://www.nature.com/articles/ngeo1069