| Era | Period | Epoch | mya |
| Cenozoic | Quaternary | Holocene | 0.01 |
| Peistocene | 1.8 | ||
| Tertiary | Pliocene | 5 | |
| Miocene | 24 | ||
| Oligocene | 34 | ||
| Eocene | 55 | ||
| Paleocene | 65 | ||
| Mesozoic | Cretaceous | 144 | |
| Jurassic | 200 | ||
| Triassic | 251 | ||
| Palaeozoic | Permian | 290 | |
| Carboniferous | 354 | ||
| Devonian | 417 | ||
| Silurian | 443 | ||
| Ordovician | 495 | ||
| Cambrian | 545 |