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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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 Germany | Silurian of North America | Ordovician of Ibero-Bohemia | Permo-Triassic Subages of Eastern Europe | Obsolete Carboniferous Ages of China | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Triassic | Early Triassic | Olenekian | Vokhmian | 247.2 | |||||||||
Induan | 251.2 | ||||||||||||
Permian | Lopingian | Changhsingian | 251.902 | ||||||||||
Wuchiapingian | Late Vyatkian/Early Vyatkian | 254.14 | |||||||||||
Guadalupian | Capitanian | Late Severodvinian/Early Severodvinian | 259.51 | ||||||||||
Wordian | Late Urzhumian/Early Urzhumian | 264.28 | |||||||||||
Roadian | Late Kazanian/Early Kazanian | 266.9 | |||||||||||
Cisuralian | Kungurian | 273.01 | |||||||||||
Artinskian | 283.5 | ||||||||||||
Sakmarian | 290.1 | ||||||||||||
Asselian | 293.52 | ||||||||||||
Carboniferous | Pennsylvanian | Gzhelian | Mapingian † | 298.9 | |||||||||
Kasimovian | 303.7 | ||||||||||||
305.9 | |||||||||||||
Moscovian | 307 | ||||||||||||
Bashkirian | 315.2 | ||||||||||||
Mississippian | Serpukhovian | 323.2 | |||||||||||
Visean | 330.9 | ||||||||||||
Tournaisian | 346.7 | ||||||||||||
Devonian | Late Devonian | Famennian | Wocklum/Dasberg/Hemberg/Nehden | 358.9 | |||||||||
Frasnian | Adorf | 372.2 | |||||||||||
Middle Devonian | Givetian | Givetian | 382.7 | ||||||||||
Eifelian | Eifelian | 387.7 | |||||||||||
Early Devonian | Emsian | Emsian | 393.3 | ||||||||||
Pragian | Siegen | 407.6 | |||||||||||
Lochkovian | Gedinnine | 410.8 | |||||||||||
Silurian | Pridoli | Cayugan | 419.2 | ||||||||||
Niagaran | 422.5 * | ||||||||||||
Ludlow | Ludfordian | 423 | |||||||||||
Gorstian | 425.6 | ||||||||||||
Wenlock | Homerian | Lockportian | 427.4 | ||||||||||
Sheinwoodian | 430.5 | ||||||||||||
Llandovery | Telychian | Ontarian | 433.4 | ||||||||||
Aeronian | 438.5 | ||||||||||||
Alexandrian | 438.7 * | ||||||||||||
Medinan | Clinton | 440.1 * | |||||||||||
440.7 * | |||||||||||||
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 |