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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 126148 collections
International Chronostratigraphic Timescale | Cambrian of North America | Cambrian of Kazakhstan | Cambrian of West Avalonia | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Cambrian | Furongian | Stage 10 | Franconian †/Dresbachian/Millardan | Batyrbaian | 485.4 | |||||||
Sunwaptan | 487.5 | |||||||||||
Jiangshanian | 489.5 | |||||||||||
Aksaian | 490.7 * | |||||||||||
Sakian | 492.2 * | |||||||||||
Steptoean | 493 * | |||||||||||
Paibian | 494 | |||||||||||
Miaolingian | Guzhangian | Marjumian | Albertian † | Ayusokkanian | 497 | |||||||
Arcadian | 498.4 | |||||||||||
499.5 | ||||||||||||
Drumian | Zhanaarykian | 500.5 | ||||||||||
Tuesaian | 503 | |||||||||||
Wuliuan | Topazan | 504.5 | ||||||||||
505.3 | ||||||||||||
Delamaran | 506.5 | |||||||||||
Series 2 | Stage 4 | Waucoban † | Branchian | 509 | ||||||||
Toyonian | 510 * | |||||||||||
Dyeran | 511 * | |||||||||||
Botomian | 512.5 * | |||||||||||
Stage 3 | 514 | |||||||||||
Montezuman | 514.8 * | |||||||||||
Atdabanian | 515.6 * | |||||||||||
Placentian | 517.1 | |||||||||||
Begadean | 519.9 * | |||||||||||
Terreneuvian | Stage 2 | Tommotian | 521 | |||||||||
525.5 | ||||||||||||
Fortunian | 529 | |||||||||||
538.8 |