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. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view
- J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
- 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 126650 collections
| International Chronostratigraphic Timescale | Ordovician of Australia | Ten Million Year Bins | Ordovician of Ibero-Bohemia | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ordovician | Late Ordovician | Hirnantian | Bolindian | Ordovician 5 | Kosovian | 443.8 | ||||||
| Katian | Kralodvorian | Bohdalec † | 445.2 | |||||||||
| Eastonian | 449 * | |||||||||||
| Berounian | 449.7 * | |||||||||||
| Gisbornian | 452 * | |||||||||||
| Sandbian | Ordovician 4 | 453 | ||||||||||
| Zahorany †/Vinice | Letna † | 456.2 * | ||||||||||
| Liben † | 458 * | |||||||||||
| Middle Ordovician | Darriwilian | Darriwilian | Ordovician 3 | 458.4 | ||||||||
| Dobrotivian | 458.5 * | |||||||||||
| Oretanian | 459.7 * | |||||||||||
| Sarka † | 461.7 * | |||||||||||
| Dapingian | Yapeenian | Ordovician 2 | Klabava † | 467.3 | ||||||||
| Arenigian | 468 | |||||||||||
| Castlemainian | 468.5 * | |||||||||||
| Early Ordovician | Floian | Chewtonian | 470 | |||||||||
| Bendigonian | 471.8 * | |||||||||||
| Lancefieldian | 473.5 * | |||||||||||
| Tremadocian | Ordovician 1 | Tremadocian | 477.7 | |||||||||
| Warendian | 482.8 * | |||||||||||
| 485.4 | ||||||||||||