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
- 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
- A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 of the Baltic | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Kosovian | Harju | Porkuni | 443.8 | |||||||||
Katian | Kralodvorian | Bohdalec † | Pirgu | 445.2 | |||||||||||
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 | 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 * | ||||||||||||||
Volkhov | Langevoja †/Vaana/Saka | 467.1 * | |||||||||||||
Dapingian | Klabava † | 467.3 | |||||||||||||
Arenigian | 468 | ||||||||||||||
Billingen | 469.3 * | ||||||||||||||
Early Ordovician | Floian | 470 | |||||||||||||
Latorp † | 470.1 * | ||||||||||||||
Hunneberg | 473.7 * | ||||||||||||||
Tremadocian | Tremadocian | 477.7 | |||||||||||||
Varangu | 481.3 * | ||||||||||||||
Pakerort | 482.2 * | ||||||||||||||
485.4 * | |||||||||||||||
486.3 | |||||||||||||||
486.5 |