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. 2024. The ICS International Chronostratigraphic Chart v2024/12. International Commission on Stratigraphy view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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 61 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 129048 collections
| International Chronostratigraphic Timescale | Permian of the Russian Platform | Ordovician of North America | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Permian | Lopingian | Wuchiapingian | Tatarian | Vyatkian | 256.8 * | ||||||
| Guadalupian | Capitanian | Severodvinian | 259.51 | ||||||||
| Wordian | Urzhumian | 264.28 | |||||||||
| Roadian | Kazanian | Povolzhian | 266.9 | ||||||||
| Sokian | 271.6 * | ||||||||||
| Cisuralian | Kungurian | Kungurian | Irenian/Ufimian | 274.4 | |||||||
| Filipovian | 277.3 * | ||||||||||
| Saraninian | 280.4 * | ||||||||||
| Artinskian | Artinskian | Sarginian | 283.3 | ||||||||
| Irginian | 285.8 * | ||||||||||
| Burtsevian | 287.7 * | ||||||||||
| Sakmarian | Sakmarian | Sterlitamakian | 290.1 | ||||||||
| Tastubian | 291.7 * | ||||||||||
| Asselian | Asselian | Shikhanian | 293.52 | ||||||||
| Uskalykian | 294.8 | ||||||||||
| Surenian | 297.5 | ||||||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | ||||||||
| Kasimovian | 303.7 | ||||||||||
| Moscovian | 307 | ||||||||||
| Bashkirian | 315.2 | ||||||||||
| Mississippian | Serpukhovian | 323.4 | |||||||||
| Visean | 330.3 | ||||||||||
| Tournaisian | 346.7 | ||||||||||
| Devonian | Late Devonian | Famennian | 358.86 | ||||||||
| Frasnian | 372.15 | ||||||||||
| Middle Devonian | Givetian | 382.31 | |||||||||
| Eifelian | 387.95 | ||||||||||
| Early Devonian | Emsian | 393.47 | |||||||||
| Pragian | 410.62 | ||||||||||
| Lochkovian | 413.02 | ||||||||||
| Silurian | Pridoli | 419.62 | |||||||||
| Ludlow | Ludfordian | 422.7 | |||||||||
| Gorstian | 425 | ||||||||||
| Wenlock | Homerian | 426.7 | |||||||||
| Sheinwoodian | 430.6 | ||||||||||
| Llandovery | Telychian | 432.9 | |||||||||
| Aeronian | 438.6 | ||||||||||
| Rhuddanian | 440.5 | ||||||||||
| Ordovician | Late Ordovician | Hirnantian | Cincinnatian | Gamachian | 443.1 | ||||||
| Katian | 445.2 | ||||||||||
| Richmondian | 445.5 | ||||||||||
| Maysvillian | Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian | 449.6 | |||||||||
| Edenian | 450.2 | ||||||||||
| Mohawkian | Chatfieldian | 451 | |||||||||
| Sandbian | 452.8 | ||||||||||
| Turinian | 453.8 | ||||||||||
| Whiterockian | Canadian † | Chazyan †/Marmor | 457.3 | ||||||||
| Middle Ordovician | Darriwilian | 458.2 | |||||||||
| Dapingian | 469.4 | ||||||||||
| Rangerian | 470.3 | ||||||||||
| Early Ordovician | Floian | Ibexian | Blackhillsian | Jeffersonian † | Cassinian † | 471.3 | |||||
| Tulean | 475.3 * | ||||||||||
| Tremadocian | 477.1 | ||||||||||
| Stairsian | 481.7 * | ||||||||||
| Skullrockian | Demingian † | 483.4 * | |||||||||
| Cambrian | Furongian | Stage 10 | 486.85 | ||||||||
| 488.9 * | |||||||||||