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
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 of Eastern North America | Devonian of France | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Devonian | Late Devonian | Famennian | Conewangan/Conneautan/Canadaway | Famennian | 358.9 | ||||
| Frasnian | West Fallsian/Sonyean | Frasnian | 372.2 | ||||||
| Middle Devonian | Givetian | Geneseean/Taghanican/Tioughniogan | Cazenovian | Givetian | 382.7 | ||||
| Eifelian | Southwoodian | Couvinien | 387.7 | ||||||
| Early Devonian | Emsian | Sawkillian/Deer Parkian | Helderbergian | 393.3 | |||||
| Pragian | 407.6 | ||||||||
| Coblencien | 408.2 * | ||||||||
| Lochkovian | Gedinnine | 410.8 | |||||||
| 419.2 | |||||||||