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
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 126701 collections
| International Chronostratigraphic Timescale | Cenozoic Subepochs | ||||||
|---|---|---|---|---|---|---|---|
| Paleogene | Oligocene | Chattian | Late Oligocene | 23.03 | |||
| Rupelian | Early Oligocene | 27.82 | |||||
| Eocene | Priabonian | Late Eocene | 33.9 | ||||
| Bartonian | Middle Eocene | 37.71 | |||||
| Lutetian | 41.2 | ||||||
| Ypresian | Early Eocene | 47.8 | |||||
| Paleocene | Thanetian | Late Paleocene | 56 | ||||
| Selandian | Middle Paleocene | 59.2 | |||||
| Danian | Early Paleocene | 61.6 | |||||
| 66 | |||||||