An event which may have caused the oceans to become shallower was
A) the rifting apart of Pangea in the Mesozoic.
B) the repeated volcanic eruptions of the Cenozoic.
C) the earthquakes of the Paleozoic.
D) the glaciation of the Mesozoic.

Question

Quizplus · Accepted Answer

The rifting apart of Pangea in the Mesozoic would have caused the oceanic crust to spread out and move apart, resulting in a decrease in oceanic depth. This is because the spreading of the crust would have caused the mantle beneath it to rise upwards, effectively pushing the overlying water up and decreasing the overall depth of the ocean basins.

An Event Which May Have Caused the Oceans to Become