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
- 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 126778 collections
| International Chronostratigraphic Timescale | Devonian Subages | Permian of the Pamirs | Permian of North America | Silurian of the Baltic | 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 | Capitanian | 259.51 | ||||||
| Wordian | Wordian | 264.28 | ||||||||
| 265.3 * | ||||||||||
| Amb | 266.1 * | |||||||||
| Murgabian | 266.2 * | |||||||||
| Roadian | Roadian | 266.9 | ||||||||
| 270.7 * | ||||||||||
| Cisuralian | Kungurian | Kubergandian | Leonardian | Cathedralian | 273.01 | |||||
| Bolorian | 279.8 | |||||||||
| Hessian | 281.9 * | |||||||||
| Artinskian | 283.5 | |||||||||
| Yakhtashian | 286 | |||||||||
| Wolfcampian | Lenoxian | 286.1 * | ||||||||
| Sakmarian | Sakmarian | 290.1 | ||||||||
| Asselian | Asselian | Nealian | 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 | Late Famennian | 358.9 | ||||||
| Middle Famennian | 365.3 * | |||||||||
| Early Famennian | 368.5 * | |||||||||
| Frasnian | Late Frasnian | 372.2 | ||||||||
| Middle Frasnian | 375.4 * | |||||||||
| Early Frasnian | 379.3 * | |||||||||
| Middle Devonian | Givetian | Late Givetian | 382.7 | |||||||
| Middle Givetian | 383.7 * | |||||||||
| Early Givetian | 385.9 * | |||||||||
| Eifelian | Late Eifelian | 387.7 | ||||||||
| Early Eifelian | 390.3 * | |||||||||
| Early Devonian | Emsian | Late Emsian | 393.3 | |||||||
| Early Emsian | 398.3 * | |||||||||
| Pragian | Pragian | 407.6 | ||||||||
| Lochkovian | Late Lochkovian | 410.8 | ||||||||
| Middle Lochkovian | 412.8 * | |||||||||
| Early Lochkovian | 415.6 * | |||||||||
| Silurian | Pridoli | Ohesaare | 419.2 | |||||||
| Kaugetuma | 421.7 * | |||||||||
| Ludlow | Ludfordian | Kuressaare | 423 | |||||||
| Paadla | 423.4 * | |||||||||
| Gorstian | 425.6 | |||||||||
| Wenlock | Homerian | Rootsikula | 427.4 | |||||||
| Jaagarahu | 429.2 * | |||||||||
| Sheinwoodian | 430.5 | |||||||||
| Jaani | 431.8 * | |||||||||
| Llandovery | Telychian | 433.4 | ||||||||
| Adavere | 434 * | |||||||||
| Aeronian | 438.5 | |||||||||
| Raikkula | 439.4 * | |||||||||
| Rhuddanian | 440.8 | |||||||||
| Juuru | 441.4 * | |||||||||
| 443.8 | ||||||||||