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. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
- D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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 126192 collections
International Chronostratigraphic Timescale | Obsolete Names for ICS Units | Cambrian of China | Cambrian of Britain | Cambrian of Siberia | Ordovician of North America | Cambrian of West Avalonia | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
470 | ||||||||||||||||||||
482 | ||||||||||||||||||||
Cambrian | Furongian | Stage 10 | Niuchehean | Taoyuanian † | Merioneth | Dolgellian/Trempealeauan | Batyrbaian | Tavgian † | Ketyan †/Yurakian | Ibexian | Skullrockian | 485.4 * | ||||||||
487.5 | ||||||||||||||||||||
Festiniogian | 489.2 * | |||||||||||||||||||
Jiangshanian | Jiangshanian | 489.5 | ||||||||||||||||||
Aksaian | 490.7 * | |||||||||||||||||||
Sakian | 492.2 * | |||||||||||||||||||
Maentwrogian | 493.1 * | |||||||||||||||||||
Paibian | Paibian | 494 | ||||||||||||||||||
Ensyan †/Maduan/Nganasanian | 494.7 * | |||||||||||||||||||
Waergangian †/Youshuanian | 494.9 * | |||||||||||||||||||
Miaolingian | Guzhangian | Series 3 † | Guzhangian | Wangcunian † | St Davids | Ayusokkanian | 497 | |||||||||||||
Arcadian | 498.4 | |||||||||||||||||||
Mayan/Menevian | 499.5 | |||||||||||||||||||
Drumian | Drumian | 500.5 | ||||||||||||||||||
Wuliuan | Stage 5 † | Wuliuan/Taijangian | Amgan/Solvan | 504.5 | ||||||||||||||||
Series 2 | Stage 4 | Duyunian | Caerfai | Branchian | 509 | |||||||||||||||
Toyonian | Lenian † | 510 * | ||||||||||||||||||
Botomian | 512.5 * | |||||||||||||||||||
Stage 3 | Nangaoian | 514 | ||||||||||||||||||
Atdabanian | 515.6 * | |||||||||||||||||||
Placentian | 517.1 | |||||||||||||||||||
Terreneuvian | Stage 2 | Meishucunian | Tommotian | 521 | ||||||||||||||||
Nemakit-Daldynian | 525.5 | |||||||||||||||||||
Fortunian | Manykaian † | 529 | ||||||||||||||||||
Jinnigian | 530.7 | |||||||||||||||||||
538.8 |