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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 126831 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 | |||||||||||