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
- A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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 127971 collections
| International Chronostratigraphic Timescale | Obsolete Precambrian Ages | Permo-Triassic Subages of Eastern Europe | ||||||
|---|---|---|---|---|---|---|---|---|
| Phanerozoic | Mesozoic | Triassic | Early Triassic | Olenekian | Vokhmian | 247.2 | ||
| Induan | 251.2 | |||||||
| Paleozoic | 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 | 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 | 485.4 | |||||
| Jiangshanian | 489.5 | |||||||
| Paibian | 494 | |||||||
| Miaolingian | Guzhangian | 497 | ||||||
| Drumian | 500.5 | |||||||
| Wuliuan | 504.5 | |||||||
| Series 2 | Stage 4 | 509 | ||||||
| Stage 3 | 514 | |||||||
| Terreneuvian | Stage 2 | 521 | ||||||
| Fortunian | 529 | |||||||
| Proterozoic | Neoproterozoic | Ediacaran | Vendian † | Poundian † | 538.8 | |||
| Wonokan † | 571.7 * | |||||||
| 635 | ||||||||