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GSA Geologic Time Scale

[ read about the changes  |  view printable PDF  |  buy the poster (18"x27") ]

Note that the compilers are still accepting comments on the overall content of time scale. Offer your comments or join in the discussion on GSA's Facebook page.

updated November 2012

Geologic Time Scale

Other versions: 2009 | 1999 | 1983


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