What is the law of stratigraphical succession?

The law of stratigraphical succession, also known as the principle of superposition, states that in any undisturbed sequence of sedimentary rocks, the oldest layers are at the bottom and the youngest are at the top. This principle helps geologists determine the relative ages of rock layers and the fossils contained within them. It is a fundamental concept in the field of geology and Paleontology, providing insight into the chronological order of geological events.