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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 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 127262 collections
| International Chronostratigraphic Timescale | North American Land Mammal Ages | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 18.5 | |||||||||
| Paleogene | Oligocene | Chattian | Arikareean | 23.03 | |||||
| Rupelian | 27.82 | ||||||||
| Whitneyan | 29.5 | ||||||||
| Orellan | 31.8 | ||||||||
| Eocene | Priabonian | Chadronian | 33.9 | ||||||
| Duchesnean | 37 | ||||||||
| Bartonian | 37.71 | ||||||||
| Uintan | 39.7 | ||||||||
| Lutetian | 41.2 | ||||||||
| Bridgerian | 46.2 | ||||||||
| Ypresian | 47.8 | ||||||||
| Wasatchian | 50.5 | ||||||||
| Clarkforkian | 54.9 | ||||||||
| Paleocene | Thanetian | 56 | |||||||
| Tiffanian | 56.2 | ||||||||
| Selandian | 59.2 | ||||||||
| Torrejonian | 60.9 | ||||||||
| Danian | 61.6 | ||||||||
| Puercan | 63.8 | ||||||||
| 66 | |||||||||