What does the Law of Superposition state about sedimentary rock layers?

The Law of Superposition is a fundamental principle in geology that states that in any sequence of undisturbed sedimentary rock layers, the oldest layers are located at the bottom, while the younger layers are found at the top. This means that if you are examining a vertical sequence of sedimentary rocks, each layer must be older than the one above it. This principle is crucial for understanding the relative ages of geological formations and for reconstructing the geological history of an area. The correct understanding of this law helps geologists determine the chronological order of rock strata and the fossils contained within them, which is essential for both geological studies and the dating of earth's history.