<span>Mass extinctions when at least half of all species die out. The largest mass extinction event occurred around 250 million years ago, when perhaps 95 % of all species went extinct. Now new ones appeared.
It was during Cretaceous.
Hope this helps !
Photon</span>
C.sediments transported by wind,water, and ice
I’m going to need a map in order to answer this question.
Answer:
y contains the most rocks
