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
- 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 126844 collections
International Chronostratigraphic Timescale | Devonian of Czechoslovakia | Cambrian of West Avalonia | Silurian of the Baltic | Carboniferous of North America | Permian of the Salt Range | |||
---|---|---|---|---|---|---|---|---|
Triassic | Early Triassic | Induan | Kathwai | 251.5 * | ||||
Permian | Lopingian | Changhsingian | 251.902 | |||||
252.4 * | ||||||||
Chhidru | 252.9 * | |||||||
Wuchiapingian | 254.14 | |||||||
Kalabagh | 255 * | |||||||
Wargal | 256 * | |||||||
Guadalupian | Capitanian | 259.51 | ||||||
Wordian | 264.28 | |||||||
265.3 * | ||||||||
Amb | 266.1 * | |||||||
Roadian | 266.9 | |||||||
270.7 * | ||||||||
Cisuralian | Kungurian | 273.01 | ||||||
Artinskian | 283.5 | |||||||
Sakmarian | 290.1 | |||||||
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 | Srbsko | 382.7 | |||||
Eifelian | Chotec | 387.7 | ||||||
Early Devonian | Emsian | Daleje/Zlichovian | 393.3 | |||||
Pragian | Pragian | 407.6 | ||||||
Lochkovian | 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 | 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 |