The Earth is 4.6 Billion years old This has been broken down into 4 major time periods (Eras). This has been broken down into 4 major time periods (Eras).
The Earth is 4.6 Billion years old
Geologic Time Scale. Era Time Period World Events LIFE Nick-name Pre- Cambrian From 4.6 Billon YBP until 570 Million YBP "Shield" Regions of the world.
