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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
- 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 127017 collections
International Chronostratigraphic Timescale | Devonian of Eastern North America | Cambrian of North America | Obsolete Precambrian Ages | Devonian of Germany | Ordovician of China | Cambrian of China | Devonian of Czechoslovakia | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Phanerozoic | Paleozoic | Devonian | Late Devonian | Famennian | Conewangan/Conneautan/Canadaway | Wocklum/Dasberg/Hemberg/Nehden | 358.9 | |||||||||||
Frasnian | West Fallsian/Sonyean | Adorf | 372.2 | |||||||||||||||
Middle Devonian | Givetian | Geneseean/Taghanican/Tioughniogan | Cazenovian | Givetian | Srbsko | 382.7 | ||||||||||||
Eifelian | Southwoodian | Eifelian | Chotec | 387.7 | ||||||||||||||
Early Devonian | Emsian | Sawkillian/Deer Parkian | Helderbergian | Emsian | Daleje/Zlichovian | 393.3 | ||||||||||||
Pragian | Siegen | Pragian | 407.6 | |||||||||||||||
Lochkovian | Gedinnine | 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 | 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 * | |||||||||||||||||
Cambrian | Furongian | Stage 10 | Franconian †/Dresbachian/Millardan | Niuchehean | Taoyuanian † | 485.4 | ||||||||||||
Sunwaptan | 487.5 | |||||||||||||||||
Jiangshanian | Jiangshanian | 489.5 | ||||||||||||||||
Steptoean | 493 * | |||||||||||||||||
Paibian | Paibian | 494 | ||||||||||||||||
Waergangian †/Youshuanian | 494.9 * | |||||||||||||||||
Miaolingian | Guzhangian | Marjumian | Albertian † | Guzhangian | Wangcunian † | 497 | ||||||||||||
Drumian | Drumian | 500.5 | ||||||||||||||||
Wuliuan | Topazan | Wuliuan/Taijangian | 504.5 | |||||||||||||||
Delamaran | 506.5 | |||||||||||||||||
Series 2 | Stage 4 | Waucoban † | Duyunian | 509 | ||||||||||||||
Dyeran | 511 * | |||||||||||||||||
Stage 3 | Nangaoian | 514 | ||||||||||||||||
Montezuman | 514.8 * | |||||||||||||||||
Begadean | 519.9 * | |||||||||||||||||
Terreneuvian | Stage 2 | Meishucunian | 521 | |||||||||||||||
Fortunian | 529 | |||||||||||||||||
Jinnigian | 530.7 | |||||||||||||||||
Proterozoic | Neoproterozoic | Ediacaran | Vendian † | Poundian † | 538.8 | |||||||||||||
Wonokan † | 571.7 * | |||||||||||||||||
635 |