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
- J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
- F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) 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
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 126562 collections
International Chronostratigraphic Timescale | Devonian of Eastern North America | Devonian Subages | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Devonian | Late Devonian | Famennian | Conewangan/Conneautan/Canadaway | Late Famennian | 358.9 | |||||
Middle Famennian | 365.3 * | |||||||||
Early Famennian | 368.5 * | |||||||||
Frasnian | West Fallsian/Sonyean | Late Frasnian | 372.2 | |||||||
Middle Frasnian | 375.4 * | |||||||||
Early Frasnian | 379.3 * | |||||||||
Middle Devonian | Givetian | Geneseean/Taghanican/Tioughniogan | Cazenovian | Late Givetian | 382.7 | |||||
Middle Givetian | 383.7 * | |||||||||
Early Givetian | 385.9 * | |||||||||
Eifelian | Southwoodian | Late Eifelian | 387.7 | |||||||
Early Eifelian | 390.3 * | |||||||||
Early Devonian | Emsian | Sawkillian/Deer Parkian | Helderbergian | 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 * | |||||||||
419.2 |