The largest mass extinction in the Phanerozoic occurred in the ________.
A)Jurassic
B)Devonian
C)Permian
D)Cambrian
E)Miocene

Question

Quizplus · Accepted Answer

The Permian-Triassic extinction event, which occurred approximately 252 million years ago, is considered to be the largest mass extinction event in the Phanerozoic eon, with an estimated 96% of all marine species and 70% of terrestrial vertebrate species going extinct.

The Largest Mass Extinction in the Phanerozoic Occurred in the ________