Cenozoic
|
early, lower, middle, middle, late, upper
|
Paleozoic
|
early, lower, middle, middle, late, upper
|
Quaternary
Holocene (Recent)
Pleistocene
Tertiary
(Neogene + Paleogene)
Pliocene
Miocene
Oligocene
Eocene
Paleocene
|
early, lower, late, upper
early, lower, late, upper
early, lower, late, upper
early, lower, late, upper
early, lower, late, upper
early, lower, middle, middle, late, upper
early, lower, late, upper
early, lower, middle, middle, late, upper
early, lower, late, upper
|
Permian
Carboniferous
- Pennsylvanian or Late, Upper Carboniferous
- Mississippian or Early, Lower Carboniferous
Devonian
- Late, Upper
- Middle, Middle
- Early, Lower
Silurian
Ordovician
- Late, Upper
- Middle, Middle
- Early, Lower
Cambrian
- Late, Upper
- Middle, Middle
- Early, Lower
|
middle, middle
middle, middle
middle, middle **
|
Mesozoic
|
early, lower, middle, middle, late, upper
|
Precambrian
|
early, lower, middle, middle, late, upper
|
Cretaceous
Jurassic
- Late, Upper
- Middle, Middle
- Early, Lower
Triassic
- Late, Upper
- Middle, Middle
- Early, Lower
|
middle, middle
|
Proterozoic
Archean
|
- upper, Precambrian Z and VI
- middle, Precambrian Y and V
- lower, Precambrian X and IV
- upper, Precambrian W and III
- middle, Precambrian V and II
- lower, Precambrian U and I ***
|