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
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
- J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 view
- M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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 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 | Obsolete Names for ICS Units | Ten Million Year Bins | Cenozoic Subepochs | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.58 | |||||||||||
| Paleogene | Oligocene | Chattian | Tertiary † | Cenozoic 4 | Late Oligocene | 23.03 | |||||
| Rupelian | Early Oligocene | 27.82 | |||||||||
| Eocene | Priabonian | Cenozoic 3 | Late Eocene | 33.9 | |||||||
| Bartonian | Middle Eocene | 37.71 | |||||||||
| Lutetian | Cenozoic 2 | 41.2 | |||||||||
| Ypresian | Early Eocene | 47.8 | |||||||||
| Paleocene | Thanetian | Cenozoic 1 | Late Paleocene | 56 | |||||||
| Selandian | Middle Paleocene | 59.2 | |||||||||
| Danian | Early Paleocene | 61.6 | |||||||||
| 66 | |||||||||||