Question

This law states that in an undisturbed rock sequence, the oldest layers are on the bottom and each successive layer is younger than the one underneath it. "Sedimentary layers are deposited in a time sequence, with the oldest on the bottom and the youngest on the top."

Answer 1

law of superposition, I believe.

Hope this helped even though you posted this two weeks ago!

Answer 2

This is the principle of superposition.

Step-by-step explanation:

This principle is used by the paleontologists to determine the age of fossils present in different layers of rock. The oldest fossil record is present in the bottom most layer of rock whereas the one present in the upper layers of sedimentary rock can be considered as near ancestor.