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
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 | Obsolete Precambrian Ages | Permian of China | Cambrian of Australia | Devonian of France | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Phanerozoic | Paleozoic | 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 | Famennian | 358.9 | ||||||
| Frasnian | Frasnian | 372.2 | ||||||||
| Middle Devonian | Givetian | Givetian | 382.7 | |||||||
| Eifelian | Couvinien | 387.7 | ||||||||
| Early Devonian | Emsian | 393.3 | ||||||||
| Pragian | 407.6 | |||||||||
| Coblencien | 408.2 * | |||||||||
| 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 | 443.8 | |||||||
| Katian | 445.2 | |||||||||
| Sandbian | 453 | |||||||||
| Middle Ordovician | Darriwilian | 458.4 | ||||||||
| Dapingian | 467.3 | |||||||||
| Early Ordovician | Floian | 470 | ||||||||
| Tremadocian | 477.7 | |||||||||
| Cambrian | Furongian | Stage 10 | Datsonian | 485.4 | ||||||
| Payntonian | 486.8 * | |||||||||
| Jiangshanian | Iverian | 489.5 | ||||||||
| Paibian | Idamean | 494 | ||||||||
| Miaolingian | Guzhangian | Mindyallan | 497 | |||||||
| Boomerangian | 499 | |||||||||
| Drumian | Undillan | 500.5 | ||||||||
| Floran | 503 | |||||||||
| Wuliuan | Templetonian | 504.5 | ||||||||
| Ordian | 507.8 * | |||||||||
| Series 2 | Stage 4 | 509 | ||||||||
| 510.8 * | ||||||||||
| Stage 3 | 514 | |||||||||
| Terreneuvian | Stage 2 | 521 | ||||||||
| Fortunian | 529 | |||||||||
| Proterozoic | Neoproterozoic | Ediacaran | Vendian † | Poundian † | 538.8 | |||||
| Wonokan † | 571.7 * | |||||||||
| 635 | ||||||||||