Relative dating is a method used by geologists and archaeologists to determine the age of rocks, fossils, and artifacts in relation to one another. It does not provide exact ages but instead establishes a sequence of events. For example, if a layer of rock contains fossils of dinosaurs and is found below a layer with mammals, it can be inferred that the dinosaurs lived before the mammals. This technique relies on principles such as the Law of Superposition, which states that in undisturbed layers of rock, the oldest layers are at the bottom and the youngest are at the top. Relative dating also considers features like faults and intrusions to understand the chronological order of geological events.