Template:Geology to Paleobiology
Revision as of 23:19, 3 October 2013 by 98.141.148.35 (talk)
| Segments of rock (strata) in chronostratigraphy | Time spans in geochronology | Notes to geochronological units |
|---|---|---|
| 4 total, half a billion years or more | ||
| 10 total, several hundred million years | ||
| tens of millions of years | ||
| millions of years | ||
| subdivision of an age, not used by the ICS timescale | ||
References
- ↑ Cohen, K.M.; Finney, S.; Gibbard, P.L. (2013), International Chronostratigraphic Chart (PDF), International Commission on Stratigraphy Unknown parameter
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