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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 127017 collections
International Chronostratigraphic Timescale | Cambrian of Siberia | Ordovician of Australia | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Bolindian | 443.8 | |||||||
Katian | 445.2 | ||||||||||
Eastonian | 449 * | ||||||||||
Gisbornian | 452 * | ||||||||||
Sandbian | 453 | ||||||||||
Middle Ordovician | Darriwilian | Darriwilian | 458.4 | ||||||||
Dapingian | Yapeenian | 467.3 | |||||||||
Castlemainian | 468.5 * | ||||||||||
Early Ordovician | Floian | Chewtonian | 470 | ||||||||
Bendigonian | 471.8 * | ||||||||||
Lancefieldian | 473.5 * | ||||||||||
Tremadocian | 477.7 | ||||||||||
Warendian | 482.8 * | ||||||||||
Mansian † | 483.55 * | ||||||||||
485.4 |