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
- 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
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
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 126844 collections
| International Chronostratigraphic Timescale | Obsolete Names for ICS Units | Cambrian of Siberia | Cambrian of Kazakhstan | Ten Million Year Bins | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cambrian | Furongian | Stage 10 | Batyrbaian | Tavgian † | Ketyan †/Yurakian | Batyrbaian | Cambrian 5 | 485.4 | ||||
| Jiangshanian | 489.5 | |||||||||||
| Aksaian | Aksaian | 490.7 * | ||||||||||
| Sakian | Sakian | 492.2 * | ||||||||||
| Paibian | 494 | |||||||||||
| Ensyan †/Maduan/Nganasanian | 494.7 * | |||||||||||
| Miaolingian | Guzhangian | Series 3 † | Ayusokkanian | Ayusokkanian | Cambrian 4 | 497 | ||||||
| Mayan/Menevian | 499.5 | |||||||||||
| Drumian | Zhanaarykian | 500.5 | ||||||||||
| Tuesaian | 503 | |||||||||||
| Wuliuan | Stage 5 † | Amgan/Solvan | Cambrian 3 | 504.5 | ||||||||
| 505.3 | ||||||||||||
| Series 2 | Stage 4 | 509 | ||||||||||
| Toyonian | Lenian † | Toyonian | 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 | Manykaian † | Cambrian 1 | 529 | |||||||||
| 538.8 | ||||||||||||