Evidence About Earth’s Past (Book)
RELATIVE AGE OF ROCKS
- Life and the Geologic Time Scale
The geologic time scale may include illustrations of how life on Earth has changed. Major events on Earth may also be shown. These include the formation of the major mountains or the extinction of the dinosaurs. Figure is a different kind of the geologic time scale. It shows how Earth’s environment and life forms have changed.
The evolution of life is shown on this spiral.