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
- 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, 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
- A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 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 126831 collections
| International Chronostratigraphic Timescale | North American Land Mammal Ages | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Quaternary | Holocene | Meghalayan | Saintaugustinean | 0 | |||||
| Santarosean | 0.0004 | ||||||||
| Northgrippian | 0.0042 | ||||||||
| Greenlandian | 0.0082 | ||||||||
| Pleistocene | Late Pleistocene | 0.0117 | |||||||
| Rancholabrean | 0.014 | ||||||||
| Chibanian | 0.129 | ||||||||
| Irvingtonian | 0.21 | ||||||||
| Calabrian | 0.774 | ||||||||
| Blancan | 1.4 | ||||||||
| Gelasian | 1.8 | ||||||||
| 2.58 | |||||||||
| 4.7 | |||||||||