Question

In a sequence of underformed sedimentary rock layers, the youngest rock layer would be?

1) On the bottom
2) On the top
3) In the middle
4) Anywhere with equal probability

Answer 1

In an undeformed sequence, the youngest sedimentary rock layer is at the top, based on the principle of superposition.

Step-by-step explanation:

In a sequence of undeformed sedimentary rock layers, the youngest rock layer would be on the top. This is due to the principle of superposition, which states that in a sequence of undisturbed sedimentary rock layers, the oldest layers are on the bottom and the youngest at the top, due to the way these layers accumulate over time. This principle is a fundamental concept in the field of geology for understanding the relative ages of rock layers.