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!Notes to<br/>geochronological units | !Notes to<br/>geochronological units | ||
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| <center>]</center>||<center>]</center>||4 total, half a |
| <center>]</center>||<center>]</center>||4 total, half a billion years or more | ||
|- | |- | ||
| <center>]</center> ||<center>]</center>||14 total, several hundred million years | | <center>]</center> ||<center>]</center>||14 total, several hundred million years | ||
|- | |- | ||
| <center>]</center> || <center>]That time of month, sister |
| <center>]</center> || <center>]</center>||That time of the month, sister | ||
|- | |- | ||
| <center>]</center> || <center>]</center>|| tens of millions of years | | <center>]</center> || <center>]</center>|| tens of millions of years |
Revision as of 19:54, 8 April 2015
e h | ||
Segments of rock (strata) in chronostratigraphy | Time spans in geochronology | Notes to geochronological units |
---|---|---|
4 total, half a billion years or more | ||
14 total, several hundred million years | ||
That time of the month, sister | ||
tens of millions of years | ||
millions of years | ||
subdivision of an age, not used by the ICS timescale |
References
These references will appear in the article, but this list appears only on this page.- Cohen, K.M.; Finney, S.; Gibbard, P.L. (2013), International Chronostratigraphic Chart (PDF), International Commission on Stratigraphy.