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| <center>]</center>||<center>]</center>||4 total, half a billion years or more | <center>]</center>||<center>]</center>||4 total, half a billion years or more
|- |-
| <center>]</center> ||<center>]</center>||10 total, several hundred million years | <center>]</center> ||<center>]</center>||10 total, hundreds upon hundreds of millions of years
|- |-
| <center>]</center> || <center>]</center>|| | <center>]</center> || <center>]</center>||hundreds of millions of years
|- |-
| <center>]</center> || <center>]</center>|| tens of millions of years | <center>]</center> || <center>]</center>|| tens of millions of years

Revision as of 17:26, 13 February 2012

e  h
Units in geochronology and stratigraphy
Segments of rock (strata) in chronostratigraphy Periods of time in geochronology Notes
Eonothem
Eon
4 total, half a billion years or more
Erathem
Era
10 total, hundreds upon hundreds of millions of years
System
Period
hundreds of millions of years
Series
Epoch
tens of millions of years
Stage
Age
millions of years
Chronozone
Chron
smaller than an age/stage, not used by the ICS timescale

References

These references will appear in the article, but this list appears only on this page.
  1. International Commission on Stratigraphy. "International Stratigraphic Chart". {{cite web}}: |archive-url= requires |url= (help); Missing or empty |url= (help)
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