|
|
|
Geological Time Scale
|
Eon |
Era
|
Period |
Epoch |
Abs. Age (Ma) |
Age of |
Events |
| Phanerozoic |
Cenozoic
|
Quaternary |
Holocene |
0-2 |
Age of
|
Humans |
| Pleistocene |
Scabland Floods |
Tertiary |
Neogene |
Pliocene |
2-5 |
|
| Miocene |
5-24 |
Columbia Basalts |
| Paleogene |
Oligocene |
24-37 |
|
| Eocene |
37-58 |
|
| Paleocene |
58-66 |
Extinction of Dinosaurs |
| Mesozoic
|
Cretaceous |
66-144 |
Age of
Reptiles |
Flowering Plants |
Jurassic |
144-208 |
1st Birds/Mammals |
Triassic |
208-245 |
1st Dinosaurs |
| Paleozoic |
Permian |
245-286 |
Amphibians |
Extinction of Trilobites |
| Carboniferous |
Pennsylvanian |
286-320 |
1st Reptiles |
Mississippian |
320-360 |
Large Primitive Trees |
Devonian |
|
360-408 |
Fishes |
1st Amphibians |
Silurian |
|
408-438 |
1st Land Plants |
Ordovician |
|
438-505 |
Invertebrates |
1st Fish |
Cambrian |
|
505-545 |
1st Shells, Trilobites |
Proterozoic |
Precambrian |
545-2,500 |
|
1st Multi-celled organisms |
Archean |
2,500-3,800 |
|
1st One-celled organisms |
Hadean |
3,800-4,600 |
|
Origin of the Earth |
|
|
