Geological time intervals

Geological time intervals are divisions used to organize Earth's 4.6-billion-year history based on significant geological events and the development of life. These intervals range from vast spans like eons, which encompass major changes in Earth's structure, to smaller periods like eras, periods, epochs, and ages that mark specific evolutionary and geological milestones. For example, the Mesozoic Era, known as the age of dinosaurs, is part of the Phanerozoic Eon, which highlights periods with abundant fossils. These divisions help scientists understand Earth's history, evolution, and the timing of major events such as mass extinctions and the emergence of new life forms.