Question

In a series of rock layers, a geologist finds fossils of a lizard-like dinosaur and a fern-like tree in layers that are 1.0 m and 1.5 m deep. However, in a layer that is 2.0 m deep, he finds fossils of bony fish and shellfish.

Which explains his findings?

A.
The ancient sea dried up and became land.

B.
The ancient land area was invaded by a sea.

C.
An asteroid hit the area, causing the dinosaur to become extinct.

D.
The continent shifted to a polar region.