International Union of Geological Sciences - Geological Time Scale

Geological Time
 

IUGS Geologic Time Scale



This Geological Timescale is after the 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

nded:

Began:

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

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
H
a
d
e
a
n

The geological time scale is used by geologists and other scientists to describe the timing and relationships between events that have occurred during 4.570 billion year history of the Earth. The table of geologic periods above complies with the dates and nomenclature proposed by the International Commission on Stratigraphy, and uses the standard color codes of the United States Geological Survey.

References:

  • Remane, J., Cita, M. B., Dercourt, J., Bouysse, P., Repetto, F. & Faure-Muret, A., (eds.) 2002: International Stratigraphic Chart. International Union of Geological Sciences: International Commission on Stratigraphy, Paris, 2002
  • Remane, J., Cita, M. B., Dercourt, J., Bouysse, P., Repetto, F. & Faure-Muret, A., (eds.) 2003: International Stratigraphic Chart. International Union of Geological Sciences: International Commission on Stratigraphy, Paris, 2003
  • International Commission on Stratigraphy: 2004: International Stratigraphic Chart. International Union of Geological Sciences: International Commission on Stratigraphy, Paris, 2004
  • Andrew H. Knoll, Malcolm R. Walter, Guy M. Narbonne, Nicholas Christie-Blick, (2004) A New Period for the Geologic Time Scale, Science 305 (5684) 621 - 622.