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
- 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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 126778 collections
| International Chronostratigraphic Timescale | Carboniferous of Western Europe | Ordovician of China | Carbo-Permian of the Russian Platform | Devonian of Germany | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |||||||||
| Kuzel | 297.7 | |||||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | |||||||
| Stephanian | Stephanian C | 300.3 * | ||||||||
| Stephanian B | 300.9 * | |||||||||
| Stephanian A | 301.4 * | |||||||||
| Kasimovian | Dorogomilovian | 303.7 | ||||||||
| Khamovnikian | 304.8 | |||||||||
| Cantabrian | 305 * | |||||||||
| Krevyakinian | 305.8 * | |||||||||
| Moscovian | Myachkovian | 307 | ||||||||
| Westphalian | Westphalian D | 307.4 * | ||||||||
| Podolskian | 308.9 * | |||||||||
| Westphalian C | 309.8 | |||||||||
| Kashirian | 311.4 * | |||||||||
| Vereian | 313.8 | |||||||||
| Westphalian B | 314.6 | |||||||||
| Melekessian | 314.8 | |||||||||
| Bashkirian | 315.2 | |||||||||
| Cheremshanian | 316.9 * | |||||||||
| Westphalian A | 317 * | |||||||||
| Prikamian | 318.6 * | |||||||||
| Namurian | Yeadonian | 318.8 * | ||||||||
| Severokeltmian | 319.9 * | |||||||||
| Marsdenian | 320.2 * | |||||||||
| Krasnopolyanian | 321.2 * | |||||||||
| Kinderscoutian | 321.5 * | |||||||||
| Voznesenian | 321.9 * | |||||||||
| Alportian | 322 * | |||||||||
| Chokierian | 323.1 * | |||||||||
| Mississippian | Serpukhovian | Zapaltjubian | 323.2 | |||||||
| Arnsbergian | 324 * | |||||||||
| Protvian | 324.4 * | |||||||||
| Steshevian | 326.8 * | |||||||||
| Pendleian | 327.4 * | |||||||||
| Tarusian | 329 * | |||||||||
| Visean | Warnantian | Brigantian † | Venevian | 330.9 | ||||||
| Mikhailovian | 331.9 * | |||||||||
| Aleksinian | 333.7 * | |||||||||
| Tulian | 335.8 * | |||||||||
| Livian | Asbian † | 336.3 * | ||||||||
| Bobrikian | 339.9 * | |||||||||
| Moliniacian | Holkerian †/Arundian/Chadian | 340.2 * | ||||||||
| Radaevkian | 343.4 * | |||||||||
| Tournaisian | Ivorian | Kosvian | 346.7 | |||||||
| Kizelian | 350.7 * | |||||||||
| Cherepetian | 351.9 * | |||||||||
| Hastarian | 353.7 * | |||||||||
| Karakubian | 354.4 * | |||||||||
| Upinian | 356.3 * | |||||||||
| Malevkian | 357.6 * | |||||||||
| Gumerovian | 358 * | |||||||||
| Devonian | Late Devonian | Famennian | Wocklum/Dasberg/Hemberg/Nehden | 358.9 | ||||||
| Frasnian | Adorf | 372.2 | ||||||||
| Middle Devonian | Givetian | Givetian | 382.7 | |||||||
| Eifelian | Eifelian | 387.7 | ||||||||
| Early Devonian | Emsian | Emsian | 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 | Hirnantian | Xiaoxita †/Shikou | Wufeng † | 443.8 | ||||
| Katian | Chientangkiangian | 445.2 | ||||||||
| Neichianshanian/Hanjiang | 449.5 | |||||||||
| Sandbian | 453 | |||||||||
| Middle Ordovician | Darriwilian | Darriwilian | Guniu †/Hulo | 458.4 | ||||||
| Hunjiang † | Dawan †/Daobaowan/Ningkuo | 466.3 * | ||||||||
| Dapingian | Dapingian | 467.3 | ||||||||
| Early Ordovician | Floian | Yiyangian | 470 | |||||||
| Tremadocian | Xinchangian | 477.7 | ||||||||
| Lianghekou † | 477.9 * | |||||||||
| 485.4 | ||||||||||