International Chronostratigraphic Timescale
The interval definitions in this timescale are derived from the following sources:
- K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
- W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication view
There are 59 timescales which overlap this one. show
Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.
Interval names marked with † are no longer in current use.
This timescale is used in the definition of 126662 collections
| International Chronostratigraphic Timescale | Obsolete Names for ICS Units | Ten Million Year Bins | Mammal Paleogene Zones | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 2.58 | |||||||||
| Paleogene | Oligocene | Chattian | Tertiary † | Cenozoic 4 | MP 30/MP 29/MP 28/MP 27/MP 26 | MP 25 | 23.03 | ||
| Rupelian | MP 24/MP 23/MP 22/MP 21 | 27.82 | |||||||
| Eocene | Priabonian | Cenozoic 3 | MP 20/MP 19/MP 18/MP 17B/MP 17A | 33.9 | |||||
| Bartonian | MP 16 | 37.71 | |||||||
| Lutetian | Cenozoic 2 | MP 15/MP 14/MP 13/MP 12/MP 11 | 41.2 | ||||||
| Ypresian | MP 10/MP 8 + 9/MP 7 | 47.8 | |||||||
| Paleocene | Thanetian | Cenozoic 1 | MP 6 | MP 1 - 5 | 56 | ||||
| Selandian | 59.2 | ||||||||
| Danian | 61.6 | ||||||||
| 66 | |||||||||