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
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- P. L. Gibbard, M. J. Head, and M. J. C. Walker. 2010. Formal ratification of the Quaternary System/Period and the Pleistocene Series/Epoch with a base at 2.58 Ma. Journal of Quaternary Science 25(2):96-102 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
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 126231 collections
International Chronostratigraphic Timescale | Devonian Subages | Ten Million Year Bins | Devonian of France | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Devonian | Late Devonian | Famennian | Late Famennian | Devonian 5 | Famennian | 358.9 | |||||
Middle Famennian | 365.3 * | ||||||||||
Early Famennian | 368.5 * | ||||||||||
Frasnian | Late Frasnian | Devonian 4 | Frasnian | 372.2 | |||||||
Middle Frasnian | 375.4 * | ||||||||||
Early Frasnian | 379.3 * | ||||||||||
Middle Devonian | Givetian | Late Givetian | Devonian 3 | Givetian | 382.7 | ||||||
Middle Givetian | 383.7 * | ||||||||||
Early Givetian | 385.9 * | ||||||||||
Eifelian | Late Eifelian | Couvinien | 387.7 | ||||||||
Early Eifelian | 390.3 * | ||||||||||
Early Devonian | Emsian | Late Emsian | Devonian 2 | 393.3 | |||||||
Early Emsian | 398.3 * | ||||||||||
Pragian | Pragian | Devonian 1 | 407.6 | ||||||||
Coblencien | 408.2 * | ||||||||||
Lochkovian | Late Lochkovian | Gedinnine | 410.8 | ||||||||
Middle Lochkovian | 412.8 * | ||||||||||
Early Lochkovian | 415.6 * | ||||||||||
419.2 |