This is an old revision of this page, as edited by Hibernian (talk | contribs) at 15:42, 10 May 2018 (no need for smaller text, just makes it bit harder to read). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 15:42, 10 May 2018 by Hibernian (talk | contribs) (no need for smaller text, just makes it bit harder to read)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)| 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 defined, several hundred million years |
| System | Period | 22 defined, tens to ~one hundred million years |
| Series | Epoch | 34 defined, tens of millions of years |
| Stage | Age | 99 defined, millions of years |
| Chronozone | Chron | 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. (2015), International Chronostratigraphic Chart (PDF), International Commission on Stratigraphy.