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
- 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
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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 126151 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 |