The geological time scale is a system used by geologists and other scientists to describe the timing and relationships between events that have occurred throughout Earth’s history. It divides Earth’s history into several periods of time, each with its own specific set of characteristics, including the formation of continents, major evolutionary changes, and mass extinctions. It is typically divided into four major eons, which are further divided into eras, periods, and epochs. The four eons are the Hadean, Archean, Proterozoic, and Phanerozoic.
giological