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
There are 59 timescales which overlap this one. show
This timescale is used in the definition of 125835 collections
| International Chronostratigraphic Timescale | Devonian of Eastern North America | ||||
|---|---|---|---|---|---|
| Devonian | Late Devonian | Famennian | Conewangan/Conneautan/Canadaway | 358.9 | |
| Frasnian | West Fallsian/Sonyean | 372.2 | |||
| Middle Devonian | Givetian | Geneseean/Taghanican/Tioughniogan | Cazenovian | 382.7 | |
| Eifelian | Southwoodian | 387.7 | |||
| Early Devonian | Emsian | Sawkillian/Deer Parkian | Helderbergian | 393.3 | |
| Pragian | 407.6 | ||||
| Lochkovian | 410.8 | ||||
| 419.2 | |||||