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
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 126762 collections
| International Chronostratigraphic Timescale | Cambrian of Britain | Obsolete Precambrian Ages | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Phanerozoic | Paleozoic | Cambrian | Furongian | Stage 10 | Merioneth | Dolgellian/Trempealeauan | 485.4 | ||
| Festiniogian | 489.2 * | ||||||||
| Jiangshanian | 489.5 | ||||||||
| Maentwrogian | 493.1 * | ||||||||
| Paibian | 494 | ||||||||
| Miaolingian | Guzhangian | St Davids | 497 | ||||||
| Drumian | 500.5 | ||||||||
| Wuliuan | 504.5 | ||||||||
| Series 2 | Stage 4 | Caerfai | 509 | ||||||
| Stage 3 | 514 | ||||||||
| Terreneuvian | Stage 2 | 521 | |||||||
| Fortunian | 529 | ||||||||
| Proterozoic | Neoproterozoic | Ediacaran | Vendian † | Poundian † | 538.8 | ||||
| Wonokan † | 571.7 * | ||||||||
| 635 | |||||||||