This is an old revision of this page, as edited by 119.30.47.208 (talk) at 07:59, 3 December 2013. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 07:59, 3 December 2013 by 119.30.47.208 (talk)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)<span style="float:right;"><span class="plainlinksneverexpand">e  h</span></span><center><big>Units in geochronology and stratigraphy</big><ref>Cohen, K.M.; Finney, S.; Gibbard, P.L. (2013), International Chronostratigraphic Chart (PDF), International Commission on Stratigraphy {{citation}}: Unknown parameter |author-separator= ignored (help).</ref></center>
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| Segments of rock (strata) in chronostratigraphy | Time spans in geochronology | Notes to<br/>geochronological units |
|---|---|---|
| <center>Eonothem</center> | <center>Eon</center> | 4 total, half a billion years or more |
| <center>Erathem</center> | <center>Era</center> | 10 total, several hundred million years |
| <center>System</center> | <center>Period</center> | |
| <center>Series</center> | <center>Epoch</center> | tens of millions of years |
| <center>Stage</center> | <center>Age</center> | millions of years |
| <center>Chronozone</center> | <center>Chron</center> | subdivision of an age, not used by the ICS timescale |
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References
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