What can be used to determine the relative age of two rocks?
a. vertical position
b. the presence of unconformities
c. radioactive dating of each layer
d. the relative age cannot be determined.

The presence of unconformities can be used to determine the relative age of two rocks. Therefore, the correct answer is B

Unconformity refers to a non-depositional surface which separates two strata of different age. Unconformity shows that deposited sedimentary rock was not continuous. Unconformity indicates that the older layer was exposed to erosion before the younger layer.

The upper rocks, that is, the rocks that are higher than the unconformities are younger than those beneath the conformity.

In general, an unconformity indicates the period when no sediments were preserved.

The types of unconformities include

Other types of unconformity include:

Therefore, the presence of unconformities can be used to determine the relative age of two rocks.

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just did the assignment and the answer was #1 +2 n