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 126764 collections
| International Chronostratigraphic Timescale | Cambrian of Kazakhstan | Carboniferous of North America | |||
|---|---|---|---|---|---|
| Permian | Cisuralian | 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 | 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 | Ungurian | 477.7 | |||
| 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 | |||||