Geological Time Scale
Click on a Period to find out more. Dates are in millions of years before present.
| Cenozoic Era (66 – 0 million years ago) |
Quaternary (2.6 to present) | |
| Neogene (23 – 2.6) | ||
| Palaeogene (66 – 23) | ||
| Mesozoic Era (252 – 66 million years ago) |
Cretaceous (145 – 66) | |
| Jurassic (201 – 145) | ||
| Triassic (252- 201) | ||
| Palaeozoic Era (539 – 252 million years ago) |
Permian (299 – 252) | |
| Carboniferous (359 – 299) | ||
| Devonian (419 – 359) | ||
| Silurian (444 – 419) | ||
| Ordovician (485-444) | ||
| Cambrian (539 – 485) | ||
| Precambrian (4,560 – 539 million years ago) | ||