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 | Permian of Western Europe | Cambrian of West Avalonia | ||||
|---|---|---|---|---|---|---|---|
| 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 | ||||||
| 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 | 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 | 477.7 | ||||||
| Cambrian | Furongian | Stage 10 | 485.4 | ||||
| Jiangshanian | 489.5 | ||||||
| Paibian | 494 | ||||||
| Miaolingian | Guzhangian | 497 | |||||
| Arcadian | 498.4 | ||||||
| Drumian | 500.5 | ||||||
| Wuliuan | 504.5 | ||||||
| Series 2 | Stage 4 | Branchian | 509 | ||||
| Stage 3 | 514 | ||||||
| Placentian | 517.1 | ||||||
| Terreneuvian | Stage 2 | 521 | |||||
| Fortunian | 529 | ||||||
| 538.8 | |||||||