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
- 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
- A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 126152 collections
International Chronostratigraphic Timescale | Cambrian of Siberia | 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 | ||||||||||||
Mansian † | 483.55 * | |||||||||||||
485.4 |