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
- 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
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 126701 collections
| International Chronostratigraphic Timescale | Obsolete Names for ICS Units | Ten Million Year Bins | Cambrian of China | Cambrian of West Avalonia | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cambrian | Furongian | Stage 10 | Cambrian 5 | Niuchehean | Taoyuanian † | 485.4 | ||||||
| Jiangshanian | Jiangshanian | 489.5 | ||||||||||
| Paibian | Paibian | 494 | ||||||||||
| Waergangian †/Youshuanian | 494.9 * | |||||||||||
| Miaolingian | Guzhangian | Series 3 † | Cambrian 4 | Guzhangian | Wangcunian † | 497 | ||||||
| Arcadian | 498.4 | |||||||||||
| Drumian | Drumian | 500.5 | ||||||||||
| Wuliuan | Stage 5 † | Cambrian 3 | Wuliuan/Taijangian | 504.5 | ||||||||
| Series 2 | Stage 4 | Duyunian | Branchian | 509 | ||||||||
| Stage 3 | Cambrian 2 | Nangaoian | 514 | |||||||||
| Placentian | 517.1 | |||||||||||
| Terreneuvian | Stage 2 | Meishucunian | 521 | |||||||||
| Fortunian | Cambrian 1 | 529 | ||||||||||
| Jinnigian | 530.7 | |||||||||||
| 538.8 | ||||||||||||