5
QuizMultiple Choice

Relative Dating

Question 5 • 26/27 EARTH & SPACE SCIENCE A

A geologist finds some tilted sedimentary rock layers.Which conclusion can the geologist draw by looking at the rock layers?

Answer
A
Their absolute age is 600 million years.
B
They were tilted before they were deposited.
C
They were originally deposited horizontally.
D
The youngest layer was originally deposited as the bottom layer.

Explanation

The principle of original horizontality says that sedimentary layers are generally deposited in horizontal or nearly horizontal layers. If they are tilted now, the tilting happened after deposition. The layers’ absolute age cannot be determined from their tilt alone, and tilt does not mean the youngest layer was originally on the bottom.

AI-written and checked against the verified answer.

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