Template:Geology to Paleobiology

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Units in geochronology and stratigraphy[1]
Segments of rock (strata) in chronostratigraphy Time spans in geochronology Notes to
geochronological units
Eonothem
Eon
4 total, half a billion years or more
Erathem
Era
10 total, several hundred million years
System
Period
Series
Epoch
tens of millions of years
Stage
Age
millions of years
Chronozone
Chron
subdivision of an age, not used by the ICS timescale

References

  1. Cohen, K.M.; Finney, S.; Gibbard, P.L. (2013), International Chronostratigraphic Chart (PDF), International Commission on Stratigraphy Unknown parameter |author-separator= ignored (help).

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