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
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- P. L. Gibbard, M. J. Head, and M. J. C. Walker. 2010. Formal ratification of the Quaternary System/Period and the Pleistocene Series/Epoch with a base at 2.58 Ma. Journal of Quaternary Science 25(2):96-102 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 | Silurian of England | Silurian of the Baltic | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Silurian | Pridoli | Red Downtonian/Temeside Shales/Downton Castle | Whitcliffe/Leintwardine | Ohesaare | 419.2 | |||||||
Bringewood/Elton | 421.3 | |||||||||||
Kaugetuma | 421.7 * | |||||||||||
Ludlow | Ludfordian | Coalbrookdale | Wenlock (England)/Tickwood | Kuressaare | 423 | |||||||
Paadla | 423.4 * | |||||||||||
Gorstian | 425.6 | |||||||||||
Buildwas | 426.4 * | |||||||||||
Wenlock | Homerian | Rootsikula | 427.4 | |||||||||
Wych | Woolhope | 428.4 * | ||||||||||
Jaagarahu | 429.2 * | |||||||||||
Sheinwoodian | 430.5 | |||||||||||
Jaani | 431.8 * | |||||||||||
Llandovery | Telychian | 433.4 | ||||||||||
Adavere | 434 * | |||||||||||
436.3 * | ||||||||||||
Aeronian | 438.5 | |||||||||||
Cowleigh Park | 439.3 * | |||||||||||
Raikkula | 439.4 * | |||||||||||
Rhuddanian | 440.8 | |||||||||||
Juuru | 441.4 * | |||||||||||
443.8 |