This photograph shows an upper unit with fragments and a lower unit with tilted layers. Which of the following statements is true?

A. The lower unit is older because it was tilted and eroded before deposition of the upper unit.
B. The upper unit is younger because it contains pieces of the underlying unit.
C. The upper unit is younger because it is on top.
D. All of these choices are correct.


Answer: D

Environmental & Atmospheric Sciences

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