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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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
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 126973 collections
International Chronostratigraphic Timescale | 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 * | |||||||
485.4 |