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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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 127017 collections
International Chronostratigraphic Timescale | Ordovician of China | Ordovician of Australia | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Hirnantian | Xiaoxita †/Shikou | Wufeng † | Bolindian | 443.8 | ||||||
Katian | Chientangkiangian | 445.2 | |||||||||||
Eastonian | 449 * | ||||||||||||
Neichianshanian/Hanjiang | 449.5 | ||||||||||||
Gisbornian | 452 * | ||||||||||||
Sandbian | 453 | ||||||||||||
Middle Ordovician | Darriwilian | Darriwilian | Guniu †/Hulo | Darriwilian | 458.4 | ||||||||
Hunjiang † | Dawan †/Daobaowan/Ningkuo | 466.3 * | |||||||||||
Dapingian | Dapingian | Yapeenian | 467.3 | ||||||||||
Castlemainian | 468.5 * | ||||||||||||
Early Ordovician | Floian | Yiyangian | Chewtonian | 470 | |||||||||
Bendigonian | 471.8 * | ||||||||||||
Lancefieldian | 473.5 * | ||||||||||||
Tremadocian | Xinchangian | 477.7 | |||||||||||
Lianghekou † | 477.9 * | ||||||||||||
Warendian | 482.8 * | ||||||||||||
485.4 |