The Earliest Age of Earth's Geologic History
"Before the Cambrian Explosion"
~4.6 Billion Years Ago - 541 Million Years Ago
Approximately 80%+ of Earths History
Common Organisms of Precambrian
- Single-celled organisms are relatively dated to be as old as ~2.1 billion years old.
- The Precambrian age is characterized by extensive volcanic eruptions and impact events including the formation of the Moon as the early Earth developed for billions of years.
- The Precambrian super-eon ended with the relatively rapid arrival or "explosion" of new organisms in the fossil record beginning the Paleozoic era.