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 126844 collections
| International Chronostratigraphic Timescale | Cambrian Epochs | Carbo-Permian of the Russian Platform | Devonian of Germany | Devonian of Eastern North America | Cambrian of North America | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Permian | Lopingian | Changhsingian | Melekhovian | 251.902 | ||||||
| Wuchiapingian | 254.14 | |||||||||
| Guadalupian | Capitanian | 259.51 | ||||||||
| Wordian | 264.28 | |||||||||
| Noginskian | 264.9 * | |||||||||
| Roadian | 266.9 | |||||||||
| Cisuralian | Kungurian | 273.01 | ||||||||
| Pavlovoposadian | 276.8 * | |||||||||
| Artinskian | 283.5 | |||||||||
| Rusavkinian | 287.6 * | |||||||||
| Sakmarian | 290.1 | |||||||||
| Asselian | 293.52 | |||||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | |||||||
| Kasimovian | Dorogomilovian | 303.7 | ||||||||
| Khamovnikian | 304.8 | |||||||||
| Krevyakinian | 305.8 * | |||||||||
| Moscovian | Myachkovian | 307 | ||||||||
| Podolskian | 308.9 * | |||||||||
| Kashirian | 311.4 * | |||||||||
| Vereian | 313.8 | |||||||||
| Melekessian | 314.8 | |||||||||
| Bashkirian | 315.2 | |||||||||
| Cheremshanian | 316.9 * | |||||||||
| Prikamian | 318.6 * | |||||||||
| Severokeltmian | 319.9 * | |||||||||
| Krasnopolyanian | 321.2 * | |||||||||
| Voznesenian | 321.9 * | |||||||||
| Mississippian | Serpukhovian | Zapaltjubian | 323.2 | |||||||
| Protvian | 324.4 * | |||||||||
| Steshevian | 326.8 * | |||||||||
| Tarusian | 329 * | |||||||||
| Visean | Venevian | 330.9 | ||||||||
| Mikhailovian | 331.9 * | |||||||||
| Aleksinian | 333.7 * | |||||||||
| Tulian | 335.8 * | |||||||||
| Bobrikian | 339.9 * | |||||||||
| Radaevkian | 343.4 * | |||||||||
| Tournaisian | Kosvian | 346.7 | ||||||||
| Kizelian | 350.7 * | |||||||||
| Cherepetian | 351.9 * | |||||||||
| Karakubian | 354.4 * | |||||||||
| Upinian | 356.3 * | |||||||||
| Malevkian | 357.6 * | |||||||||
| Gumerovian | 358 * | |||||||||
| Devonian | Late Devonian | Famennian | Wocklum/Dasberg/Hemberg/Nehden | Conewangan/Conneautan/Canadaway | 358.9 | |||||
| Frasnian | Adorf | West Fallsian/Sonyean | 372.2 | |||||||
| Middle Devonian | Givetian | Givetian | Geneseean/Taghanican/Tioughniogan | Cazenovian | 382.7 | |||||
| Eifelian | Eifelian | Southwoodian | 387.7 | |||||||
| Early Devonian | Emsian | Emsian | Sawkillian/Deer Parkian | Helderbergian | 393.3 | |||||
| Pragian | Siegen | 407.6 | ||||||||
| Lochkovian | Gedinnine | 410.8 | ||||||||
| Silurian | Pridoli | 419.2 | ||||||||
| Ludlow | Ludfordian | 423 | ||||||||
| Gorstian | 425.6 | |||||||||
| Wenlock | Homerian | 427.4 | ||||||||
| Sheinwoodian | 430.5 | |||||||||
| Llandovery | Telychian | 433.4 | ||||||||
| Aeronian | 438.5 | |||||||||
| Rhuddanian | 440.8 | |||||||||
| Ordovician | Late Ordovician | Hirnantian | 443.8 | |||||||
| Katian | 445.2 | |||||||||
| Sandbian | 453 | |||||||||
| Middle Ordovician | Darriwilian | 458.4 | ||||||||
| Dapingian | 467.3 | |||||||||
| Early Ordovician | Floian | 470 | ||||||||
| Tremadocian | 477.7 | |||||||||
| Cambrian | Furongian | Stage 10 | Late Cambrian | Franconian †/Dresbachian/Millardan | 485.4 | |||||
| Sunwaptan | 487.5 | |||||||||
| Jiangshanian | 489.5 | |||||||||
| Steptoean | 493 * | |||||||||
| Paibian | 494 | |||||||||
| Miaolingian | Guzhangian | Middle Cambrian | Marjumian | Albertian † | 497 | |||||
| Drumian | 500.5 | |||||||||
| Wuliuan | Topazan | 504.5 | ||||||||
| Delamaran | 506.5 | |||||||||
| Series 2 | Stage 4 | Early Cambrian | Waucoban † | 509 | ||||||
| Dyeran | 511 * | |||||||||
| Stage 3 | 514 | |||||||||
| Montezuman | 514.8 * | |||||||||
| Begadean | 519.9 * | |||||||||
| Terreneuvian | Stage 2 | 521 | ||||||||
| Fortunian | 529 | |||||||||
| 538.8 | ||||||||||