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 126764 collections
| International Chronostratigraphic Timescale | Carboniferous of Western Europe | Ordovician of China | Permian of the Russian Platform | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Permian | Lopingian | Wuchiapingian | Tatarian | Vyatkian | 256.8 * | |||||
| Guadalupian | Capitanian | Severodvinian | 259.51 | |||||||
| Wordian | Urzhumian | 264.28 | ||||||||
| Roadian | Kazanian | Povolzhian | 266.9 | |||||||
| Sokian | 270.7 * | |||||||||
| Cisuralian | Kungurian | Kungurian | Irenian/Ufimian | 273.01 | ||||||
| Filipovian | 276.5 * | |||||||||
| Saraninian | 280.1 * | |||||||||
| Artinskian | Artinskian | Sarginian | 283.5 | |||||||
| Irginian | 285.9 * | |||||||||
| Burtsevian | 287.8 * | |||||||||
| Sakmarian | Sakmarian | Sterlitamakian | 290.1 | |||||||
| Tastubian | 291.7 * | |||||||||
| Asselian | Asselian | Shikhanian | 293.52 | |||||||
| Uskalykian | 294.8 | |||||||||
| Surenian | 297.5 | |||||||||
| Kuzel | 297.7 | |||||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | |||||||
| Stephanian | Stephanian C | 300.3 * | ||||||||
| Stephanian B | 300.9 * | |||||||||
| Stephanian A | 301.4 * | |||||||||
| Kasimovian | 303.7 | |||||||||
| Cantabrian | 305 * | |||||||||
| Moscovian | 307 | |||||||||
| Westphalian | Westphalian D | 307.4 * | ||||||||
| Westphalian C | 309.8 | |||||||||
| Westphalian B | 314.6 | |||||||||
| Bashkirian | 315.2 | |||||||||
| Westphalian A | 317 * | |||||||||
| Namurian | Yeadonian | 318.8 * | ||||||||
| Marsdenian | 320.2 * | |||||||||
| Kinderscoutian | 321.5 * | |||||||||
| Alportian | 322 * | |||||||||
| Chokierian | 323.1 * | |||||||||
| Mississippian | Serpukhovian | 323.2 | ||||||||
| Arnsbergian | 324 * | |||||||||
| Pendleian | 327.4 * | |||||||||
| Visean | Warnantian | Brigantian † | 330.9 | |||||||
| Livian | Asbian † | 336.3 * | ||||||||
| Moliniacian | Holkerian †/Arundian/Chadian | 340.2 * | ||||||||
| Tournaisian | Ivorian | 346.7 | ||||||||
| Hastarian | 353.7 * | |||||||||
| Devonian | Late Devonian | Famennian | 358.9 | |||||||
| Frasnian | 372.2 | |||||||||
| Middle Devonian | Givetian | 382.7 | ||||||||
| Eifelian | 387.7 | |||||||||
| Early Devonian | Emsian | 393.3 | ||||||||
| Pragian | 407.6 | |||||||||
| Lochkovian | 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 | ||||||||||