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
- A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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 127258 collections
| International Chronostratigraphic Timescale | Cambrian of Kazakhstan | Permo-Triassic Subages of Eastern Europe | Ordovician of Australia | Ordovician of Britain | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Triassic | Early Triassic | Olenekian | Vokhmian | 247.2 | ||||||
| Induan | 251.2 | |||||||||
| Permian | Lopingian | Changhsingian | 251.902 | |||||||
| Wuchiapingian | Late Vyatkian/Early Vyatkian | 254.14 | ||||||||
| Guadalupian | Capitanian | Late Severodvinian/Early Severodvinian | 259.51 | |||||||
| Wordian | Late Urzhumian/Early Urzhumian | 264.28 | ||||||||
| Roadian | Late Kazanian/Early Kazanian | 266.9 | ||||||||
| Cisuralian | Kungurian | 273.01 | ||||||||
| Artinskian | 283.5 | |||||||||
| Sakmarian | 290.1 | |||||||||
| Asselian | 293.52 | |||||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | |||||||
| 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 | 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 | Bolindian | Ashgill | Hirnantian | 443.8 | ||||
| Katian | Rawtheyan | 445.2 | ||||||||
| Cautleyan | 448.9 * | |||||||||
| Eastonian | 449 * | |||||||||
| Pusgillian | 449.3 * | |||||||||
| Caradoc | Streffordian | Onnian † | 449.6 * | |||||||
| Cheneyan | 451.5 * | |||||||||
| Gisbornian | 452 * | |||||||||
| Burrellian | 452.7 * | |||||||||
| Sandbian | 453 | |||||||||
| Actonian † | 453.2 * | |||||||||
| Marshbrookian † | Woolstonian † | 454.2 * | ||||||||
| Longvillian † | 455.2 * | |||||||||
| Aurelucian | 456.8 * | |||||||||
| Soudleyan †/Harnagian/Costonian | 457.4 * | |||||||||
| Middle Ordovician | Darriwilian | Darriwilian | Llanvirn | Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn | 458.4 | |||||
| Abereiddian/Early Llanvirn | 461.3 * | |||||||||
| Dapingian | Yapeenian | 467.3 | ||||||||
| Arenig | Fennian | 468.4 * | ||||||||
| Castlemainian | 468.5 * | |||||||||
| Early Ordovician | Floian | Chewtonian | 470 | |||||||
| Whitlandian | 471.1 * | |||||||||
| Bendigonian | 471.8 * | |||||||||
| Lancefieldian | 473.5 * | |||||||||
| Moridunian | 474.3 * | |||||||||
| Tremadocian | Ungurian | Tremadoc | Migneintian | 477.7 | ||||||
| Cressagian | 480.8 * | |||||||||
| Warendian | 482.8 * | |||||||||
| 485 * | ||||||||||
| Cambrian | Furongian | Stage 10 | Batyrbaian | 485.4 | ||||||
| Jiangshanian | 489.5 | |||||||||
| Aksaian | 490.7 * | |||||||||
| Sakian | 492.2 * | |||||||||
| Paibian | 494 | |||||||||
| Miaolingian | Guzhangian | Ayusokkanian | 497 | |||||||
| 499.5 | ||||||||||
| Drumian | Zhanaarykian | 500.5 | ||||||||
| Tuesaian | 503 | |||||||||
| Wuliuan | 504.5 | |||||||||
| 505.3 | ||||||||||
| Series 2 | Stage 4 | 509 | ||||||||
| Toyonian | 510 * | |||||||||
| Botomian | 512.5 * | |||||||||
| Stage 3 | 514 | |||||||||
| Atdabanian | 515.6 * | |||||||||
| Terreneuvian | Stage 2 | Tommotian | 521 | |||||||
| 525.5 | ||||||||||