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. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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
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 | Pridoli | Red Downtonian/Temeside Shales/Downton Castle | Whitcliffe/Leintwardine | 419.2 | |||||||
Bringewood/Elton | 421.3 | ||||||||||
Ludlow | Ludfordian | Coalbrookdale | Wenlock (England)/Tickwood | 423 | |||||||
Gorstian | 425.6 | ||||||||||
Buildwas | 426.4 * | ||||||||||
Wenlock | Homerian | 427.4 | |||||||||
Wych | Woolhope | 428.4 * | |||||||||
Sheinwoodian | 430.5 | ||||||||||
Llandovery | Telychian | 433.4 | |||||||||
436.3 * | |||||||||||
Aeronian | 438.5 | ||||||||||
Cowleigh Park | 439.3 * | ||||||||||
Rhuddanian | 440.8 | ||||||||||
443.8 |