Geologic Time Scale

Cenozoic
Quaternary

base 1.8 MY

Holocene
Pleistocene
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  

 

 

Last revised 1/14/2003