Which of the four numbered features on this figure is the youngest?
A)1
B)2
C)3

Name: Which of the four numbered features on this figure is the youngest? A)1 B)2 C)3
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Question

Which of the four numbered features on this figure is the youngest? 
A)1 
B)2 
C)3

Quizplus · Accepted Answer

The principle of superposition states that in any undisturbed sequence of rocks, the youngest layer is always on top and the oldest layer is always on the bottom. Looking at the figure, we see that layer 4 is on top of all the other layers, so it must be the youngest. Therefore, the answer is D.

Which of the Four Numbered Features on This Figure Is