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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 126606 collections
International Chronostratigraphic Timescale | Cambrian of Siberia | 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 * | ||||||||||||
Mansian † | 483.55 * | ||||||||||||
485.4 * | |||||||||||||
486.3 | |||||||||||||
486.5 |