Geologic Time

                              

 

 

 

 
 
A Division of Western Fossils,
Operated by Robert Drachuk
  

Geologic Time After International Union of Geological Sciences: International Commission on Stratigraphy, 2002, 2003 and 2004 with color scheme that follows the official recommendation of the IUGS and ICS

Eon

Era

Period

ended:

beginning:

P
h
e
n
e
r
o
z
o
i
c

Cenozoic

Neogene

 0 Ma 23.03 Ma

Paleogene

 23.03 Ma 65.5 ± 0.3 Ma

Mesozoic

Cretaceous

 65.5 ± 0.3 Ma 145.5 ± 4.0 Ma

Jurassic

 145.5 ± 4.0 Ma 199.6 ± 0.6 Ma

Triassic

 199.6 ± 0.6 Ma 251.0 ± 0.4 Ma

Paleozoic

Permian

 251.0 ± 0.4 Ma 299.0 ± 0.8 Ma

Carboniferous

 299.0 ± 0.8 Ma 359.2 ± 2.5 Ma

Devonian

 359.2 ± 2.5 Ma 416.0 ± 2.8 Ma

Silurian

 416.0 ± 2.8 Ma 443.7 ± 1.5 Ma

Ordovician

 443.7 ± 1.5 Ma 488.3 ± 1.7 Ma

Cambrian

 488.3 ± 1.7 Ma 542.0 ± 1.0 Ma

P
r
o
t
e
r
o
t
z
o
i
c

Neoproterozoic

Ediacaran
[Vendian]

 542.0 ± 1.0 Ma 650 Ma

Cryogenian

 650 Ma 850 Ma

Tonian

 850 Ma 1000 Ma

Mesoproterozoic
[Riphean]

Stenian

 1000 Ma 1200 Ma

Ectasian

 1200 Ma 1400 Ma

Calymmian

 1400 Ma 1600 Ma

Paleoproterozoic

Statherian

 1600 Ma 1800 Ma

Orosirian

 1800 Ma 2050 Ma

Rhyacian

 2050 Ma 2300 Ma

Siderian

 2300 Ma 2500 Ma

A
r
c
h
e
a
n

Neoarchean

 2500 Ma 2800 Ma

Mesoarchean

 2800 Ma 3200 Ma

Paleoarchean

 3200 Ma 3600 Ma

Eoarchean

 3600 Ma not defined