The law of superposition allows us to determine what?

The law of superposition allows us to determine the relative ages of sedimentary rock layers. According to this principle, in an undisturbed sequence of rocks, the oldest layers are at the bottom and the youngest are at the top. This helps geologists and paleontologists establish a chronological order of geological events and the history of life on Earth. It is a fundamental concept in stratigraphy and helps in understanding the geological time scale.