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, 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
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
- F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) view
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
- 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
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 126606 collections
| International Chronostratigraphic Timescale | Ordovician of Ibero-Bohemia | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ordovician | Late Ordovician | Hirnantian | Kosovian | 443.8 | |||||||||
| Katian | Kralodvorian | Bohdalec † | 445.2 | ||||||||||
| Berounian | 449.7 * | ||||||||||||
| Sandbian | 453 | ||||||||||||
| Zahorany †/Vinice | Letna † | 456.2 * | |||||||||||
| Liben † | 458 * | ||||||||||||
| Middle Ordovician | Darriwilian | 458.4 | |||||||||||
| Dobrotivian | 458.5 * | ||||||||||||
| Oretanian | 459.7 * | ||||||||||||
| Sarka † | 461.7 * | ||||||||||||
| Dapingian | Klabava † | 467.3 | |||||||||||
| Arenigian | 468 | ||||||||||||
| Early Ordovician | Floian | 470 | |||||||||||
| Tremadocian | Tremadocian | 477.7 | |||||||||||
| 485.4 | |||||||||||||