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
- M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view
- J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 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 126562 collections
International Chronostratigraphic Timescale | Devonian Subages | |||||
---|---|---|---|---|---|---|
Devonian | Late Devonian | Famennian | Late Famennian | 358.9 | ||
Middle Famennian | 365.3 * | |||||
Early Famennian | 368.5 * | |||||
Frasnian | Late Frasnian | 372.2 | ||||
Middle Frasnian | 375.4 * | |||||
Early Frasnian | 379.3 * | |||||
Middle Devonian | Givetian | Late Givetian | 382.7 | |||
Middle Givetian | 383.7 * | |||||
Early Givetian | 385.9 * | |||||
Eifelian | Late Eifelian | 387.7 | ||||
Early Eifelian | 390.3 * | |||||
Early Devonian | Emsian | 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 |