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
- J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication view
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
There are 59 timescales which overlap this one. show
Interval names marked with † are no longer in current use.
This timescale is used in the definition of 126710 collections
| International Chronostratigraphic Timescale | Obsolete Names for ICS Units | Mammal Paleogene Zones | Cenozoic Subepochs | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 2.58 | ||||||||||
| Paleogene | Oligocene | Chattian | Tertiary † | MP 30/MP 29/MP 28/MP 27/MP 26 | MP 25 | Late Oligocene | 23.03 | |||
| Rupelian | MP 24/MP 23/MP 22/MP 21 | Early Oligocene | 27.82 | |||||||
| Eocene | Priabonian | MP 20/MP 19/MP 18/MP 17B/MP 17A | Late Eocene | 33.9 | ||||||
| Bartonian | MP 16 | Middle Eocene | 37.71 | |||||||
| Lutetian | MP 15/MP 14/MP 13/MP 12/MP 11 | 41.2 | ||||||||
| Ypresian | MP 10/MP 8 + 9/MP 7 | Early Eocene | 47.8 | |||||||
| Paleocene | Thanetian | MP 6 | MP 1 - 5 | Late Paleocene | 56 | |||||
| Selandian | Middle Paleocene | 59.2 | ||||||||
| Danian | Early Paleocene | 61.6 | ||||||||
| 66 | ||||||||||