Geologic Timescale Ages

Hadean

4.6 Ga

Eoarchean

4.0 Ga

Paleoarchean

3.8 Ga

Mesoarchean

3.2 Ga

Neoarchean

2.8 Ga

Paleoproterozoic

2.5 Ga

Mesoproterozoic

1.6 Ga

Tonian

1.0 Ga

Cryogenian

720 Ma

Ediacaran

635 Ma

Cambrian

539 Ma

Devonian

419.6 Ma

Triassic

252 Ma

Jurassic

201 Ma

Early Cretaceous

143 Ma

Late Cretaceous

100.5 Ma

Paleocene

66 Ma

Eocene

56 Ma

Oligocene

34 Ma

Miocene

23 Ma

Pliocene

5.3 Ma

Pleistocene

2.58 Ma

Holocene

11,700 yrs