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
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 127980 collections
| International Chronostratigraphic Timescale | Devonian of France | Cambrian of Australia | Silurian of England | Ordovician of Ibero-Bohemia | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Devonian | Late Devonian | Famennian | Famennian | 358.9 | |||||||
| Frasnian | Frasnian | 372.2 | |||||||||
| Middle Devonian | Givetian | Givetian | 382.7 | ||||||||
| Eifelian | Couvinien | 387.7 | |||||||||
| Early Devonian | Emsian | 393.3 | |||||||||
| Pragian | 407.6 | ||||||||||
| Coblencien | 408.2 * | ||||||||||
| Lochkovian | Gedinnine | 410.8 | |||||||||
| 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 | ||||||||||
| Ordovician | Late Ordovician | Hirnantian | Kosovian | 443.8 | |||||||
| Katian | Kralodvorian | Bohdalec † | 445.2 | ||||||||
| Berounian | 449.7 * | ||||||||||
| Sandbian | 453 | ||||||||||
| Zahorany †/Vinice | Letna † | 456.2 * | |||||||||
| Liben † | 458 * | ||||||||||
| Middle Ordovician | Darriwilian | 458.4 | |||||||||
| Dobrotivian | 458.5 * | ||||||||||
| Oretanian | 459.7 * | ||||||||||
| Sarka † | 461.7 * | ||||||||||
| Dapingian | Klabava † | 467.3 | |||||||||
| Arenigian | 468 | ||||||||||
| Early Ordovician | Floian | 470 | |||||||||
| Tremadocian | Tremadocian | 477.7 | |||||||||
| Cambrian | Furongian | Stage 10 | Datsonian | 485.4 | |||||||
| Payntonian | 486.8 * | ||||||||||
| Jiangshanian | Iverian | 489.5 | |||||||||
| Paibian | Idamean | 494 | |||||||||
| Miaolingian | Guzhangian | Mindyallan | 497 | ||||||||
| Boomerangian | 499 | ||||||||||
| Drumian | Undillan | 500.5 | |||||||||
| Floran | 503 | ||||||||||
| Wuliuan | Templetonian | 504.5 | |||||||||
| Ordian | 507.8 * | ||||||||||
| Series 2 | Stage 4 | 509 | |||||||||
| 510.8 * | |||||||||||