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GSA Geologic Time Scale

The time scale printed in April/May 2009 GSA Today contained a spelling error (under ORDOVICIAN: HIMANTIAN should be HIRNANTIAN). This page contains the corrected version.
[ read about the changes  |  view printable PDF | buy the poster ]

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

Geologic Time Scale

updated April 2009



Other versions: 2009 | 1999 | 1983

 

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