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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 China | Ordovician of the Baltic | Ordovician of Ibero-Bohemia | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Hirnantian | Xiaoxita †/Shikou | Wufeng † | Harju | Porkuni | Kosovian | 443.8 | |||||||||
Katian | Chientangkiangian | Pirgu | Kralodvorian | Bohdalec † | 445.2 | |||||||||||||
Neichianshanian/Hanjiang | 449.5 | |||||||||||||||||
Vormsi | 449.6 * | |||||||||||||||||
Berounian | 449.7 * | |||||||||||||||||
Nabala | Johvi † | 450 * | ||||||||||||||||
Viru | Rakvere | 450.6 * | ||||||||||||||||
Oandu | 452 * | |||||||||||||||||
Sandbian | Keila | Idavere † | 453 | |||||||||||||||
Haljala | 453.9 | |||||||||||||||||
Zahorany †/Vinice | Letna † | 456.2 * | ||||||||||||||||
Kukruse | 456.4 * | |||||||||||||||||
Uhaku | Aluoja † | 457.5 * | ||||||||||||||||
Liben † | 458 * | |||||||||||||||||
Middle Ordovician | Darriwilian | Darriwilian | Guniu †/Hulo | 458.4 | ||||||||||||||
Dobrotivian | 458.5 * | |||||||||||||||||
Lasnamagi | 458.9 * | |||||||||||||||||
Oretanian | 459.7 * | |||||||||||||||||
Aseri | 460.4 * | |||||||||||||||||
Sarka † | 461.7 * | |||||||||||||||||
Oeland | Kunda | 462.9 * | ||||||||||||||||
Valaste †/Hunderum | 464.3 * | |||||||||||||||||
Hunjiang † | Dawan †/Daobaowan/Ningkuo | 466.3 * | ||||||||||||||||
Volkhov | Langevoja †/Vaana/Saka | 467.1 * | ||||||||||||||||
Dapingian | Dapingian | Klabava † | 467.3 | |||||||||||||||
Arenigian | 468 | |||||||||||||||||
Billingen | 469.3 * | |||||||||||||||||
Early Ordovician | Floian | Yiyangian | 470 | |||||||||||||||
Latorp † | 470.1 * | |||||||||||||||||
Hunneberg | 473.7 * | |||||||||||||||||
Tremadocian | Xinchangian | Tremadocian | 477.7 | |||||||||||||||
Lianghekou † | 477.9 * | |||||||||||||||||
Varangu | 481.3 * | |||||||||||||||||
Pakerort | 482.2 * | |||||||||||||||||
485.4 * | ||||||||||||||||||
486.3 | ||||||||||||||||||
486.5 |