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
- 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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 | Ordovician of North America | Permian of the Pamirs | Obsolete Carboniferous Ages of China | Devonian of Germany | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Permian | Lopingian | Changhsingian | Dorashamian | 251.902 | ||||||||
| Wuchiapingian | Dzhulfian | 254.14 | ||||||||||
| Guadalupian | Capitanian | Midian | 259.51 | |||||||||
| Wordian | 264.28 | |||||||||||
| Murgabian | 266.2 * | |||||||||||
| Roadian | 266.9 | |||||||||||
| Cisuralian | Kungurian | Kubergandian | 273.01 | |||||||||
| Bolorian | 279.8 | |||||||||||
| Artinskian | 283.5 | |||||||||||
| Yakhtashian | 286 | |||||||||||
| Sakmarian | Sakmarian | 290.1 | ||||||||||
| Asselian | Asselian | 293.52 | ||||||||||
| Carboniferous | Pennsylvanian | Gzhelian | Mapingian † | 298.9 | ||||||||
| Kasimovian | 303.7 | |||||||||||
| 305.9 | ||||||||||||
| Moscovian | 307 | |||||||||||
| Bashkirian | 315.2 | |||||||||||
| Mississippian | Serpukhovian | 323.2 | ||||||||||
| Visean | 330.9 | |||||||||||
| Tournaisian | 346.7 | |||||||||||
| 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 | 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 | ||||||||||||