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
- 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
- J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 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
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 | Ordovician of the Baltic | Ordovician of Ibero-Bohemia | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Harju | Porkuni | Kosovian | 443.8 | |||||||||||
Katian | Pirgu | Kralodvorian | Bohdalec † | 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 |