Eon

Era

Period

Epoch

Phanerozoic

(543 mya to present)

Cenozoic

(65 mya to today)

Quaternary

(1.8 mya to today)

Holocene

(10,000 yrs to today)

Pleistocene

(1.8 mya to 10,000 yrs)

Tertiary

(65 to 1.8 mya)

Pliocene

(5.3 to 1.8 mya)

Miocene

(23.8 to 5.3 mya)

Oligocene

(33.7 to 23.8 mya)

Eocene

(54.8 to 33.7 mya)

Paleocene

(65 to 54.8 mya)

Mesozoic

(248 to 65 mya)

Cretaceous

(144 to 65 mya)

 

Jurassic

(206 to 144 mya)

 

Triassic

(248 to 206 mya)

 

Paleozoic

(543 to 248 mya)

Permian

(290 to 248 mya)

 

Pennsylvanian

(323 to 290 mya)

 

Mississippian

(354 to 323 mya)

 

Devonian

(417 to 354 mya)

 

Silurian

(443 to 417 mya)

 

Ordovician

(490 to 443 mya)

 

Cambrian

(543 to 490 mya)

 

Precambrian

(4500 to 543 mya)

Proterozoic

(2500 to 543 mya)

 

 

Archaean

(3800 to 2500 mya)

 

 

Hadean

(4500 to 3800 mya)

 

 

Credits: The times given to the various eons, eras, periods, and epochs are credited to the University of California

Museum of Paleontology web page: www.ucmp.berkeley.edu/help/timeform.html .