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
- D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) 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 126973 collections
International Chronostratigraphic Timescale | Cambrian of Siberia | Ordovician of China | Ordovician of the Baltic | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Hirnantian | Xiaoxita †/Shikou | Wufeng † | Harju | Porkuni | 443.8 | ||||||||
Katian | Chientangkiangian | Pirgu | 445.2 | |||||||||||||
Neichianshanian/Hanjiang | 449.5 | |||||||||||||||
Vormsi | 449.6 * | |||||||||||||||
Nabala | Johvi † | 450 * | ||||||||||||||
Viru | Rakvere | 450.6 * | ||||||||||||||
Oandu | 452 * | |||||||||||||||
Sandbian | Keila | Idavere † | 453 | |||||||||||||
Haljala | 453.9 | |||||||||||||||
Kukruse | 456.4 * | |||||||||||||||
Uhaku | Aluoja † | 457.5 * | ||||||||||||||
Middle Ordovician | Darriwilian | Darriwilian | Guniu †/Hulo | 458.4 | ||||||||||||
Lasnamagi | 458.9 * | |||||||||||||||
Aseri | 460.4 * | |||||||||||||||
Oeland | Kunda | 462.9 * | ||||||||||||||
Valaste †/Hunderum | 464.3 * | |||||||||||||||
Hunjiang † | Dawan †/Daobaowan/Ningkuo | 466.3 * | ||||||||||||||
Volkhov | Langevoja †/Vaana/Saka | 467.1 * | ||||||||||||||
Dapingian | Dapingian | 467.3 | ||||||||||||||
Billingen | 469.3 * | |||||||||||||||
Early Ordovician | Floian | Yiyangian | 470 | |||||||||||||
Latorp † | 470.1 * | |||||||||||||||
Hunneberg | 473.7 * | |||||||||||||||
Tremadocian | Xinchangian | 477.7 | ||||||||||||||
Lianghekou † | 477.9 * | |||||||||||||||
Varangu | 481.3 * | |||||||||||||||
Pakerort | 482.2 * | |||||||||||||||
Mansian † | 483.55 * | |||||||||||||||
485.4 * | ||||||||||||||||
486.3 | ||||||||||||||||
486.5 |