3 - 2.94
2.94 - 2.88
2.88 - 2.82
2.82 - 2.76
2.76 - 2.7
2.1-1.8
1.8-1.5
300M
3 - 2.7
60M
600-300
300-0
1.5-1.2
12th Galactic year 3 - 2.75
11th 2.75 -
Archean Eon 3.9 - 2.5
Precambrian Time 4.5 - 543 M