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
- A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 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 126130 collections
International Chronostratigraphic Timescale | Cambrian of Britain | Cambrian of Kazakhstan | Obsolete Names for ICS Units | Cambrian of West Avalonia | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cambrian | Furongian | Stage 10 | Merioneth | Dolgellian/Trempealeauan | Batyrbaian | 485.4 | ||||||||
Festiniogian | 489.2 * | |||||||||||||
Jiangshanian | 489.5 | |||||||||||||
Aksaian | 490.7 * | |||||||||||||
Sakian | 492.2 * | |||||||||||||
Maentwrogian | 493.1 * | |||||||||||||
Paibian | 494 | |||||||||||||
Miaolingian | Guzhangian | St Davids | Ayusokkanian | Series 3 † | 497 | |||||||||
Arcadian | 498.4 | |||||||||||||
499.5 | ||||||||||||||
Drumian | Zhanaarykian | 500.5 | ||||||||||||
Tuesaian | 503 | |||||||||||||
Wuliuan | Stage 5 † | 504.5 | ||||||||||||
505.3 | ||||||||||||||
Series 2 | Stage 4 | Caerfai | Branchian | 509 | ||||||||||
Toyonian | 510 * | |||||||||||||
Botomian | 512.5 * | |||||||||||||
Stage 3 | 514 | |||||||||||||
Atdabanian | 515.6 * | |||||||||||||
Placentian | 517.1 | |||||||||||||
Terreneuvian | Stage 2 | Tommotian | 521 | |||||||||||
525.5 | ||||||||||||||
Fortunian | 529 | |||||||||||||
538.8 |