Question

carefully examine the image below. using your knowledge of the law of superposition, identify which of the following statements is accurate. a layer a is younger than layer b, but older than layer d. b layer a is older than layer b, but younger than layer d. c layer b is older than layer c, but younger than layer a. d layer b is younger than layer c, but older than layer a.

Explanation:

Step1: Apply the Law of Superposition

The Law of Superposition states that in undisturbed sedimentary rock layers, the older layer is at the bottom and the younger layer is at the top. Layer A is below Layer D, so Layer A is older than Layer D.

Step2: Analyze intrusive rock (Layer B)

Intrusive rocks (like Layer B) form when magma intrudes into pre - existing rock layers. The intrusive rock (Layer B) is younger than the layers it intrudes into. Layer B intrudes into Layer A, so Layer B is younger than Layer A. But Layer D is a separate sedimentary layer above Layer A (assuming normal superposition where applicable, and no evidence of overturning).

Answer:

B. Layer A is older than Layer B, but younger than Layer D.