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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
- D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) 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 126689 collections
| International Chronostratigraphic Timescale | Devonian Subages | Devonian of Eastern North America | Devonian of France | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Devonian | Late Devonian | Famennian | Late Famennian | Conewangan/Conneautan/Canadaway | Famennian | 358.9 | ||||||
| Middle Famennian | 365.3 * | |||||||||||
| Early Famennian | 368.5 * | |||||||||||
| Frasnian | Late Frasnian | West Fallsian/Sonyean | Frasnian | 372.2 | ||||||||
| Middle Frasnian | 375.4 * | |||||||||||
| Early Frasnian | 379.3 * | |||||||||||
| Middle Devonian | Givetian | Late Givetian | Geneseean/Taghanican/Tioughniogan | Cazenovian | Givetian | 382.7 | ||||||
| Middle Givetian | 383.7 * | |||||||||||
| Early Givetian | 385.9 * | |||||||||||
| Eifelian | Late Eifelian | Southwoodian | Couvinien | 387.7 | ||||||||
| Early Eifelian | 390.3 * | |||||||||||
| Early Devonian | Emsian | Late Emsian | Sawkillian/Deer Parkian | Helderbergian | 393.3 | |||||||
| Early Emsian | 398.3 * | |||||||||||
| Pragian | Pragian | 407.6 | ||||||||||
| Coblencien | 408.2 * | |||||||||||
| Lochkovian | Late Lochkovian | Gedinnine | 410.8 | |||||||||
| Middle Lochkovian | 412.8 * | |||||||||||
| Early Lochkovian | 415.6 * | |||||||||||
| 419.2 | ||||||||||||