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
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 | Carboniferous of Western Europe | Devonian Subages | Ordovician of Ibero-Bohemia | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Permian | Cisuralian | Asselian | Kuzel | 297.7 | ||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | |||||||
| Stephanian | Stephanian C | 300.3 * | ||||||||
| Stephanian B | 300.9 * | |||||||||
| Stephanian A | 301.4 * | |||||||||
| Kasimovian | 303.7 | |||||||||
| Cantabrian | 305 * | |||||||||
| Moscovian | 307 | |||||||||
| Westphalian | Westphalian D | 307.4 * | ||||||||
| Westphalian C | 309.8 | |||||||||
| Westphalian B | 314.6 | |||||||||
| Bashkirian | 315.2 | |||||||||
| Westphalian A | 317 * | |||||||||
| Namurian | Yeadonian | 318.8 * | ||||||||
| Marsdenian | 320.2 * | |||||||||
| Kinderscoutian | 321.5 * | |||||||||
| Alportian | 322 * | |||||||||
| Chokierian | 323.1 * | |||||||||
| Mississippian | Serpukhovian | 323.2 | ||||||||
| Arnsbergian | 324 * | |||||||||
| Pendleian | 327.4 * | |||||||||
| Visean | Warnantian | Brigantian † | 330.9 | |||||||
| Livian | Asbian † | 336.3 * | ||||||||
| Moliniacian | Holkerian †/Arundian/Chadian | 340.2 * | ||||||||
| Tournaisian | Ivorian | 346.7 | ||||||||
| Hastarian | 353.7 * | |||||||||
| 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 | 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 | Kosovian | 443.8 | ||||||
| Katian | Kralodvorian | Bohdalec † | 445.2 | |||||||
| Berounian | 449.7 * | |||||||||
| Sandbian | 453 | |||||||||
| Zahorany †/Vinice | Letna † | 456.2 * | ||||||||
| Liben † | 458 * | |||||||||
| Middle Ordovician | Darriwilian | 458.4 | ||||||||
| Dobrotivian | 458.5 * | |||||||||
| Oretanian | 459.7 * | |||||||||
| Sarka † | 461.7 * | |||||||||
| Dapingian | Klabava † | 467.3 | ||||||||
| Arenigian | 468 | |||||||||
| Early Ordovician | Floian | 470 | ||||||||
| Tremadocian | Tremadocian | 477.7 | ||||||||
| 485.4 | ||||||||||