|
EONS |
ERAS |
PERIODS |
EPOCHS |
|
Choice Names and Spelling
-
Archean
-
Cambrian
-
Cenozoic
-
Cretaceous
-
Devonian
-
Early
-
Early
-
Eocene
-
Hadean
-
Holocene
-
Jurassic
-
Late
-
Late
-
Mesozoic
-
Middle
-
Middle
-
Miocene
-
Mississippian
-
Oligocene
-
Ordovician
-
Paleocene
-
Paleozoic
-
Pennsylvanian
-
Permian
-
Phanerozoic
-
Pleistocene
-
Pliocene
-
Precambrian
-
Proterozoic
-
Quaternary
-
Silurian
-
Tertiary
-
Triassic
|