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
- 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
- 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
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 | Silurian of England | Permian of China | Ordovician of North America | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Permian | Lopingian | Changhsingian | Meishanian | 251.902 | ||||||||
| Baoqingian | 253.4 * | |||||||||||
| Wuchiapingian | Laoshanian | 254.14 | ||||||||||
| Laibinian | 257.7 * | |||||||||||
| Guadalupian | Capitanian | Lengwuan | 259.51 | |||||||||
| Wordian | Kuhfengian | 264.28 | ||||||||||
| Roadian | 266.9 | |||||||||||
| Cisuralian | Kungurian | Luodianian | 273.01 | |||||||||
| Artinskian | 283.5 | |||||||||||
| Longlinian | 285.4 * | |||||||||||
| Sakmarian | 290.1 | |||||||||||
| Asselian | Zisongian | 293.52 | ||||||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | |||||||||
| 300.1 | ||||||||||||
| Kasimovian | 303.7 | |||||||||||
| Moscovian | 307 | |||||||||||
| Bashkirian | 315.2 | |||||||||||
| Mississippian | Serpukhovian | 323.2 | ||||||||||
| Visean | 330.9 | |||||||||||
| Tournaisian | 346.7 | |||||||||||
| 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 | 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 | |||||||||||
| Ordovician | Late Ordovician | Hirnantian | Cincinnatian | Gamachian | 443.8 | |||||||
| Katian | 445.2 | |||||||||||
| Richmondian | 446 * | |||||||||||
| Maysvillian | Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian | 449.8 * | ||||||||||
| Edenian | 450.4 * | |||||||||||
| Mohawkian | Chatfieldian | 451.1 * | ||||||||||
| Sandbian | 453 | |||||||||||
| Turinian | 453.7 * | |||||||||||
| Whiterockian | Canadian † | Chazyan †/Marmor | 457 * | |||||||||
| Middle Ordovician | Darriwilian | 458.4 | ||||||||||
| Dapingian | 467.3 | |||||||||||
| Rangerian | 469.1 * | |||||||||||
| Early Ordovician | Floian | Ibexian | Blackhillsian | Jeffersonian † | Cassinian † | 470 | ||||||
| Tulean | 473.9 * | |||||||||||
| Tremadocian | 477.7 | |||||||||||
| Stairsian | 480.3 * | |||||||||||
| Skullrockian | Demingian † | 482 * | ||||||||||
| Cambrian | Furongian | Stage 10 | 485.4 | |||||||||
| 487.5 | ||||||||||||