Answer: It is an example of a Law---- The law of superposition
Step-by-step explanation:
The Law of superposition, by the geologist Nicolaus Steno gives us the idea of how rocks are arranged in strata. It states layers of rocks are arranged such that the oldest layers of rocks are found deeply down a strata of rocks with the youngest occurring at the topmost part as long as the rocks are not subjected to agents of deformation like erosion which may rearrange the format of their arrangement.