Question

the diagram shows cross - cutting relationships among rocks. which statement accurately describes the geologic features? d occurred after b. d occurred before a. a formed after the horizontal layer above was deposited. f formed before the horizontal layer above was deposited.

Explanation:

According to the principle of cross - cutting relationships in geology, a feature that cuts across another is younger. Feature D cuts across B, so D is younger than B. Feature D also cuts across A, so D is younger than A. Feature A is deformed and the horizontal layer above is not deformed, so A formed before the horizontal layer. Feature F is deformed and the horizontal layer above is not, so F formed before the horizontal layer above was deposited.

Answer:

D. F formed before the horizontal layer above was deposited.