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
- 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 126762 collections
| International Chronostratigraphic Timescale | Ordovician of China | Permian of Western Europe | Silurian of the Baltic | |||||
|---|---|---|---|---|---|---|---|---|
| Permian | Lopingian | Wuchiapingian | Zechstein | 254.14 | ||||
| Guadalupian | Capitanian | Rotliegendes | 259.51 | |||||
| Wordian | 264.28 | |||||||
| Roadian | 266.9 | |||||||
| Cisuralian | Kungurian | 273.01 | ||||||
| Artinskian | Autunian | 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 | 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 * | |||||||
| 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 | ||||||||