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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) 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
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 China | Ordovician of Ibero-Bohemia | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Hirnantian | Xiaoxita †/Shikou | Wufeng † | Kosovian | 443.8 | |||||||||
Katian | Chientangkiangian | Kralodvorian | Bohdalec † | 445.2 | ||||||||||||
Neichianshanian/Hanjiang | 449.5 | |||||||||||||||
Berounian | 449.7 * | |||||||||||||||
Sandbian | 453 | |||||||||||||||
Zahorany †/Vinice | Letna † | 456.2 * | ||||||||||||||
Liben † | 458 * | |||||||||||||||
Middle Ordovician | Darriwilian | Darriwilian | Guniu †/Hulo | 458.4 | ||||||||||||
Dobrotivian | 458.5 * | |||||||||||||||
Oretanian | 459.7 * | |||||||||||||||
Sarka † | 461.7 * | |||||||||||||||
Hunjiang † | Dawan †/Daobaowan/Ningkuo | 466.3 * | ||||||||||||||
Dapingian | Dapingian | Klabava † | 467.3 | |||||||||||||
Arenigian | 468 | |||||||||||||||
Early Ordovician | Floian | Yiyangian | 470 | |||||||||||||
Tremadocian | Xinchangian | Tremadocian | 477.7 | |||||||||||||
Lianghekou † | 477.9 * | |||||||||||||||
485.4 |