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
- 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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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 126130 collections
| International Chronostratigraphic Timescale | Ten Million Year Bins | Cambrian of Kazakhstan | Cambrian of Siberia | Ordovician of the Baltic | Ordovician of North America | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 462.9 | ||||||||||||||
| 470 | ||||||||||||||
| 482 | ||||||||||||||
| 482.2 | ||||||||||||||
| Cambrian | Furongian | Stage 10 | Cambrian 5 | Batyrbaian | Batyrbaian | Tavgian † | Ketyan †/Yurakian | Oeland | Pakerort | Ibexian | Skullrockian | 485.4 * | ||
| 486.3 * | ||||||||||||||
| 486.5 | ||||||||||||||
| 487.5 | ||||||||||||||
| Jiangshanian | 489.5 | |||||||||||||
| Aksaian | Aksaian | 490.7 * | ||||||||||||
| Sakian | Sakian | 492.2 * | ||||||||||||
| Paibian | 494 | |||||||||||||
| Ensyan †/Maduan/Nganasanian | 494.7 * | |||||||||||||
| Miaolingian | Guzhangian | Cambrian 4 | Ayusokkanian | Ayusokkanian | 497 | |||||||||
| Mayan/Menevian | 499.5 | |||||||||||||
| Drumian | Zhanaarykian | 500.5 | ||||||||||||
| Tuesaian | 503 | |||||||||||||
| Wuliuan | Cambrian 3 | Amgan/Solvan | 504.5 | |||||||||||
| 505.3 | ||||||||||||||
| Series 2 | Stage 4 | 509 | ||||||||||||
| Toyonian | Toyonian | Lenian † | 510 * | |||||||||||
| Botomian | Botomian | 512.5 * | ||||||||||||
| Stage 3 | Cambrian 2 | 514 | ||||||||||||
| Atdabanian | Atdabanian | 515.6 * | ||||||||||||
| Terreneuvian | Stage 2 | Tommotian | Tommotian | 521 | ||||||||||
| Nemakit-Daldynian | 525.5 | |||||||||||||
| Fortunian | Cambrian 1 | Manykaian † | 529 | |||||||||||
| 538.8 | ||||||||||||||