Answer:
by recognizing that the layers below it are older and that the layers above it are younger
Explanation:
A geologist determining the age of the rock can use the law of superposition for estimating the age of the rock. The law of superposition is fundamental in interpreting the age of the earth as it provides the relative age of any rock layers at any location.
In the context, the geologist can identify and determine the environment and the age of the rock layer by recognizing the layers below it are older rocks and the layers above it are younger using the law of superposition.