How long can the recovery of biodiversity take following ancient mass extinctions?

Answer

10 to 50 million years

Evidence suggests that recovery periods following past catastrophes, such as the P-T or O-S events, often required deep time, spanning 10 to 50 million years for biodiversity to return to pre-extinction levels.

How long can the recovery of biodiversity take following ancient mass extinctions?
biologyextinctionGeologycause