Geologic Time Chart

Based on International Stratigraphic Chart
International Commission on Stratigraphy
October 2003

Eon Era Period Epoch Date
(Millions of years
before present)
End of Mesozoic m.y.
End of Paleozoic m.y.
End of Precambrian m.y.

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Geologic Time Chart created by Pamela J. W. Gore
Pamela.Gore@gpc.edu
Georgia Perimeter College, Georgia
April 16, 1998
Modified April 2, 1999 - beginning of Cambrian changed
Dates modified January 18, 2000 to agree with textbook
Updated November 26, 2003 - Tertiary and Quaternary eliminated
Based on International Stratigraphic Chart, October 2003.
See also American Geological Institute Interactive Geologic Time Scale

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