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
- 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 126762 collections
| International Chronostratigraphic Timescale | Permian of the Pamirs | Silurian Ages of Europe | Carboniferous of North America | Permian of the Salt Range | |||
|---|---|---|---|---|---|---|---|
| Triassic | Early Triassic | Induan | Kathwai | 251.5 * | |||
| Permian | Lopingian | Changhsingian | Dorashamian | 251.902 | |||
| 252.4 * | |||||||
| Chhidru | 252.9 * | ||||||
| Wuchiapingian | Dzhulfian | 254.14 | |||||
| Kalabagh | 255 * | ||||||
| Wargal | 256 * | ||||||
| Guadalupian | Capitanian | Midian | 259.51 | ||||
| Wordian | 264.28 | ||||||
| 265.3 * | |||||||
| Amb | 266.1 * | ||||||
| Murgabian | 266.2 * | ||||||
| Roadian | 266.9 | ||||||
| 270.7 * | |||||||
| Cisuralian | Kungurian | Kubergandian | 273.01 | ||||
| Bolorian | 279.8 | ||||||
| Artinskian | 283.5 | ||||||
| Yakhtashian | 286 | ||||||
| Sakmarian | Sakmarian | 290.1 | |||||
| Asselian | Asselian | Bursumian † | 293.52 | ||||
| Carboniferous | Pennsylvanian | Gzhelian | Virgilian | 298.9 | |||
| Kasimovian | Missourian | 303.7 | |||||
| Desmoinesian | 305.9 * | ||||||
| Moscovian | 307 | ||||||
| Atokan | 312.7 * | ||||||
| Bashkirian | 315.2 | ||||||
| Morrowan | 318.4 * | ||||||
| Mississippian | Serpukhovian | Chesterian | 323.2 | ||||
| Visean | 330.9 | ||||||
| Meramecian | 335.8 * | ||||||
| Osagean | 343.1 * | ||||||
| Tournaisian | 346.7 | ||||||
| Kinderhookian | 351.9 * | ||||||
| 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 | Gleedonian | 427.4 | ||||
| Whitwellian | 429.7 * | ||||||
| 430.5 | |||||||