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
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 126764 collections
| International Chronostratigraphic Timescale | Permian Subages of Germany | Ordovician of China | |||||
|---|---|---|---|---|---|---|---|
| Permian | Lopingian | Changhsingian | Buntsandstein | 251.902 | |||
| Wuchiapingian | 254.14 | ||||||
| Guadalupian | Capitanian | Ohre/Aller | 259.51 | ||||
| Wordian | Leine | 264.28 | |||||
| Roadian | 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 | Hirnantian | Xiaoxita †/Shikou | Wufeng † | 443.8 | |
| Katian | Chientangkiangian | 445.2 | |||||
| Neichianshanian/Hanjiang | 449.5 | ||||||
| Sandbian | 453 | ||||||
| Middle Ordovician | Darriwilian | Darriwilian | Guniu †/Hulo | 458.4 | |||
| Hunjiang † | Dawan †/Daobaowan/Ningkuo | 466.3 * | |||||
| Dapingian | Dapingian | 467.3 | |||||
| Early Ordovician | Floian | Yiyangian | 470 | ||||
| Tremadocian | Xinchangian | 477.7 | |||||
| Lianghekou † | 477.9 * | ||||||
| 485.4 | |||||||