| AGE (in billions of years) |
EON NAMES | MAJOR EVENTS (in billions of years) |
|---|---|---|
| 0 - 0.54 | Phanerozoic | |
| 0.00025 FA Homo sapiens | ||
| 0.065 FA LA dinosaurs | ||
| 0.225 FA dinosaurs | ||
| 0.54 FA metazoans with hard shells | ||
| 0.54 - 2.5 | Proterozoic | |
| 1.8 FA common red beds | ||
| 1.8 LA common banded iron formations (BIFs) |
||
| 1.9 FA eucaryotes | ||
| 2.5 - 4.0 | Archean | |
| 2.6 FA red beds | ||
| ~3.1 FA definate microbes | ||
| 3.5 FA stromatolites iron formations (BIFs) |
||
| 3.7 oldest sedimentary rock | ||
| 4.0 - 5.0 | Priscoan | |
| 4.6 Accretion of the Erath and Moon |
||