Question

what is the primary purpose of using the law of superposition?
the exact age of a single rock in years.
the types of fossils that can be found in each rock layer.
the relative age and sequence of events for a set of rock layers.
the location of igneous intrusions and faults within the earths crust.

Explanation:

The Law of Superposition is a geological principle that states in undisturbed rock layers, the oldest layers are at the bottom, with younger layers on top. This principle is used to determine the relative order (sequence) of rock layers and the events that formed them, not exact numerical ages, fossil types, or the location of intrusions/faults directly.

Answer:

The relative age and sequence of events for a set of rock layers.