Showing the following age(s):
  Eon Era Period Sub-Period Epoch Ma*
  Phanerozoic Cenozoic Neogene Holocene
0.01
Pleistocene


1.8
Pliocene


5.3
Miocene


23.0
Paleogene Oligocene


33.9
Eocene


55.8

Paleocene


65.5
Mesozoic Cretaceous


145.5
Jurassic


199.6

Triassic


251.0
Paleozoic Permian


299.0
Carboniferous Pennsylvanian


318.1
Mississippian


359.2
Devonian


416.0
Silurian


443.7
Ordovician


488.3
Cambrian


542.0
Precambrian Proterozoic


2500
Archean


not
defined
 
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Title bar modified from montage by John Pojeta Jr. (USGS/Smithsonian)

Dates (in Ma) courtesy of the International Commission on Stratigraphy, 2003. (http://www.stratigraphy.org)

  *Ma = Abbreviation for mega-annum (106 years); a million years.

Note on the Tertiary and the Quaternary: The Tertiary and Quaternary have been eliminated from the most recent International Stratigraphic Charts. The Quaternary was formerly considered to be made up of the Holocene and the Pleistocene. The Paleogene and older Neogene were defined as the Tertiary.