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
- 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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 | Cambrian of Australia | Cambrian of West Avalonia | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Cambrian | Furongian | Stage 10 | Datsonian | 485.4 | ||||||
| Payntonian | 486.8 * | |||||||||
| Jiangshanian | Iverian | 489.5 | ||||||||
| Paibian | Idamean | 494 | ||||||||
| Miaolingian | Guzhangian | Mindyallan | 497 | |||||||
| Arcadian | 498.4 | |||||||||
| Boomerangian | 499 | |||||||||
| Drumian | Undillan | 500.5 | ||||||||
| Floran | 503 | |||||||||
| Wuliuan | Templetonian | 504.5 | ||||||||
| Ordian | 507.8 * | |||||||||
| Series 2 | Stage 4 | Branchian | 509 | |||||||
| 510.8 * | ||||||||||
| Stage 3 | 514 | |||||||||
| Placentian | 517.1 | |||||||||
| Terreneuvian | Stage 2 | 521 | ||||||||
| Fortunian | 529 | |||||||||
| 538.8 | ||||||||||