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 126520 collections
International Chronostratigraphic Timescale | Cambrian of Australia | Obsolete Names for ICS Units | Cambrian of West Avalonia | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Cambrian | Furongian | Stage 10 | Datsonian | 485.4 | |||||||
Payntonian | 486.8 * | ||||||||||
Jiangshanian | Iverian | 489.5 | |||||||||
Paibian | Idamean | 494 | |||||||||
Miaolingian | Guzhangian | Mindyallan | Series 3 † | 497 | |||||||
Arcadian | 498.4 | ||||||||||
Boomerangian | 499 | ||||||||||
Drumian | Undillan | 500.5 | |||||||||
Floran | 503 | ||||||||||
Wuliuan | Templetonian | Stage 5 † | 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 |