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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 128152 collections
| International Chronostratigraphic Timescale | Devonian Subages | Devonian of Eastern North America | Silurian of England | Permian Subages of Germany | Carboniferous of North America | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Permian | Lopingian | Changhsingian | Buntsandstein | 251.902 | ||||||
| Wuchiapingian | 254.14 | |||||||||
| Guadalupian | Capitanian | Ohre/Aller | 259.51 | |||||||
| Wordian | Leine | 264.28 | ||||||||
| Roadian | 266.9 | |||||||||
| Cisuralian | Kungurian | 273.01 | ||||||||
| Artinskian | 283.5 | |||||||||
| Sakmarian | 290.1 | |||||||||
| Asselian | Bursumian † | 293.52 | ||||||||
| Carboniferous | Pennsylvanian | Gzhelian | Virgilian | 298.9 | ||||||
| Kasimovian | Missourian | 303.7 | ||||||||
| Desmoinesian | 305.9 * | |||||||||
| Moscovian | 307 | |||||||||
| Atokan | 312.7 * | |||||||||
| Bashkirian | 315.2 | |||||||||
| Morrowan | 318.4 * | |||||||||
| Mississippian | Serpukhovian | Chesterian | 323.2 | |||||||
| Visean | 330.9 | |||||||||
| Meramecian | 335.8 * | |||||||||
| Osagean | 343.1 * | |||||||||
| Tournaisian | 346.7 | |||||||||
| Kinderhookian | 351.9 * | |||||||||
| Devonian | Late Devonian | Famennian | Late Famennian | Conewangan/Conneautan/Canadaway | 358.9 | |||||
| Middle Famennian | 365.3 * | |||||||||
| Early Famennian | 368.5 * | |||||||||
| Frasnian | Late Frasnian | West Fallsian/Sonyean | 372.2 | |||||||
| Middle Frasnian | 375.4 * | |||||||||
| Early Frasnian | 379.3 * | |||||||||
| Middle Devonian | Givetian | Late Givetian | Geneseean/Taghanican/Tioughniogan | Cazenovian | 382.7 | |||||
| Middle Givetian | 383.7 * | |||||||||
| Early Givetian | 385.9 * | |||||||||
| Eifelian | Late Eifelian | Southwoodian | 387.7 | |||||||
| Early Eifelian | 390.3 * | |||||||||
| Early Devonian | Emsian | Late Emsian | Sawkillian/Deer Parkian | Helderbergian | 393.3 | |||||
| Early Emsian | 398.3 * | |||||||||
| Pragian | Pragian | 407.6 | ||||||||
| Lochkovian | Late Lochkovian | 410.8 | ||||||||
| Middle Lochkovian | 412.8 * | |||||||||
| Early Lochkovian | 415.6 * | |||||||||
| 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 | ||||||||||