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
- M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 126973 collections
International Chronostratigraphic Timescale | Obsolete Names for ICS Units | Cambrian Epochs | Cambrian of North America | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cambrian | Furongian | Stage 10 | Late Cambrian | Franconian †/Dresbachian/Millardan | 485.4 | ||||||||
Sunwaptan | 487.5 | ||||||||||||
Jiangshanian | 489.5 | ||||||||||||
Steptoean | 493 * | ||||||||||||
Paibian | 494 | ||||||||||||
Miaolingian | Guzhangian | Series 3 † | Middle Cambrian | Marjumian | Albertian † | 497 | |||||||
Drumian | 500.5 | ||||||||||||
Wuliuan | Stage 5 † | Topazan | 504.5 | ||||||||||
Delamaran | 506.5 | ||||||||||||
Series 2 | Stage 4 | Early Cambrian | Waucoban † | 509 | |||||||||
Dyeran | 511 * | ||||||||||||
Stage 3 | 514 | ||||||||||||
Montezuman | 514.8 * | ||||||||||||
Begadean | 519.9 * | ||||||||||||
Terreneuvian | Stage 2 | 521 | |||||||||||
Fortunian | 529 | ||||||||||||
538.8 |