| Eon | Era | Period | Epoch | Dates (Ma) |
h a n e r o z o i c |
Cenozoic | Quaternary | Holocene | 0.01 to present |
| Pleistocene | 1.8 to 0.01 | |||
| Tertiary | Pliocene | 5.3 to 1.8 | ||
| Miocene | 23.8 to 5.3 | |||
| Oligocene | 33.7 to 23.8 | |||
| Eocene | 54.8 to 33.7 | |||
| Paleocene | 65.0 to 54.8 | |||
| Mesozoic | Cretaceous | 144 to 65 | ||
| Jurassic | 206 to 144 | |||
| Triassic | 248 to 206 | |||
| Paleozoic | Permian | 290 to 248 | ||
| Pennsylvanian | 323 to 290 | |||
| Mississippian | 354 to 323 | |||
| Devonian | 417 to 354 | |||
| Silurian | 443 to 417 | |||
| Ordovician | 490 to 443 | |||
| Cambrian | 543 to 490 | |||
| Proterozoic Eon | 2500 to 543 | |||
| Archean Eon | 3800? to 2500 | |||
| Hadean Eon | 4500? to 3800 | |||
| pre-Solar System time | 15000 to 4500 | |||