Question

Fossils in _______ layers of rock are generally estimated to be _______ than fossils found in the upper layers. older, younger newer, younger older, older newer, older

Answer 1

Fossils in lower layers of rock are generally estimated to be older than fossils found in the upper layers.

Answer 2

Answer is option (C) older, older.

Explanation about the topic:

Fossils found in the older layers of a rock (i.e) that are deposited in a deeper position of the Earth, are usually older when compared with the fossils seen in the upper layers of the rock.

Due to the fact that the fossils get accumulated layer upon layer, the older fossils are seen in the bottom layers of the rock.