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
- J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view
- J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 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 126148 collections
| International Chronostratigraphic Timescale | Cenozoic Subepochs | Paleogene Mammal Ages of Asia | North American Mammal Subages/Zones | Mammal Paleogene Zones | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18.5 | |||||||||||||||
| Paleogene | Oligocene | Chattian | Late Oligocene | Tabenbulakian | Hsandagolian | late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean | Harrisonian | MP 30/MP 29/MP 28/MP 27/MP 26 | MP 25 | 23.03 | |||||
| Monroecreekian | 23.1 * | ||||||||||||||
| Geringian | 24.7 * | ||||||||||||||
| Rupelian | Early Oligocene | Kekeamuan | MP 24/MP 23/MP 22/MP 21 | 27.82 | |||||||||||
| 29.5 | |||||||||||||||
| Eocene | Priabonian | Late Eocene | Houldjinian/Ergilian/Ulangochuian | Late Chadronian/Middle Chadronian/Early Chadronian | MP 20/MP 19/MP 18/MP 17B/MP 17A | 33.9 | |||||||||
| 37 | |||||||||||||||
| Bartonian | Middle Eocene | Sharamurunian/Irdinmanhan/Arshantan | MP 16 | 37.71 | |||||||||||
| Late Uintan/Early Uintan | 39.7 | ||||||||||||||
| Lutetian | MP 15/MP 14/MP 13/MP 12/MP 11 | 41.2 | |||||||||||||
| Twinbuttean/Blacksforkian/Gardnerbuttian | 46.2 | ||||||||||||||
| Ypresian | Early Eocene | Bumbanian | MP 10/MP 8 + 9/MP 7 | 47.8 | |||||||||||
| Lostcabinian/Lysitean/Graybullian/Sandcouleean | 50.5 | ||||||||||||||
| Cf3/Cf2/Cf1 | 54.9 | ||||||||||||||
| Paleocene | Thanetian | Late Paleocene | Gashatan | MP 6 | MP 1 - 5 | 56 | |||||||||
| Ti6/Ti5/Ti4/Ti3/Ti2/Ti1 | 56.2 | ||||||||||||||
| Selandian | Middle Paleocene | 59.2 | |||||||||||||
| To3/To2/To1 | 60.9 | ||||||||||||||
| Danian | Early Paleocene | 61.6 | |||||||||||||
| Pu3/Pu2/Pu1 | 63.8 | ||||||||||||||
| 66 | |||||||||||||||