Based on the principle of superposition, which layer of sedimentary rock is the oldest?

A. Layer B
B. Layer D
C. Layer C
D. Layer A



Answer :

Final answer:

Layer A is the oldest based on the principle of superposition.


Explanation:

The oldest layer of sedimentary rock based on the principle of superposition is Layer A. According to the law of superposition, in an undisturbed sequence of sedimentary strata, the layers at the bottom are the oldest, and those above are younger.


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