Global Stratotype and Point of Reference (GSSP)

The Global Stratotype Section and Point of Reference (GSSP) is a specific marker used by geologists to define the boundaries of geological time periods, such as the start of a new epoch or era. It serves as a standardized reference point found in rock layers, which is agreed upon internationally. By identifying these points, scientists can accurately correlate and compare geological formations across the world, helping us understand Earth's history and the evolution of life. Essentially, GSSPs provide a consistent framework for studying and discussing geological time.