| Cenozoic |
| Quaternary base 1.8 MY
|
|
| Tertiary
Base 65 MY
|
| Pliocene |
| Miocene |
| Oligocene |
| Eocene |
| Paleocene |
|
|
| Mesozoic |
| Cretaceous base 146 MY |
| Jurassic base 208 MY |
| Triassic base 245 MY |
|
| Paleozoic
base 544 my
|
| Permian |
| Pennsylvanian |
| Mississippian |
| Devonian |
| Silurian |
| Ordovician |
| Cambrian |
|
| Precambrian |
|