Which of the Following is NOT One of the "Big

Question

Which of the following is NOT one of the "Big Five" mass extinctions?
A) End-Permian (251 Ma)
B) End-Triassic (200 Ma)
C) Late Devonian (about 360 Ma)
D) Eocene-Oligocene (33.9 Ma)
E) Terminal Ordovician (444 Ma)

Accepted Answer

The Eocene-Oligocene extinction event is not one of the "Big Five" mass extinctions, but rather a smaller extinction event that occurred about 33.9 million years ago. The "Big Five" extinctions refer to five major extinction events that had a significant impact on the Earth's biodiversity and ecosystem functioning.