USGS

Major Divisions of Geologic Time

The major divisions, with brief explanations of each, are shown in the following scale of relative geologic time, which is arranged in chronological order with the oldest division at the bottom, the youngest at the top.

Diagram showing divisions of geologic time

Return to Relative Time Scale



This page is URL: <http://pubs.usgs.gov/gip/geotime/divisions.html>
Last updated August 27, 1999
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