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
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication view
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
- J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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 126186 collections
International Chronostratigraphic Timescale | North American Land Mammal Ages | Mammal Paleogene Zones | Cenozoic Subepochs | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Quaternary | Holocene | Meghalayan | Saintaugustinean | 0 | |||||||||
Santarosean | 0.0004 | ||||||||||||
Northgrippian | 0.0042 | ||||||||||||
Greenlandian | 0.0082 | ||||||||||||
Pleistocene | Late Pleistocene | Late Pleistocene | 0.0117 | ||||||||||
Rancholabrean | 0.014 | ||||||||||||
Chibanian | Middle Pleistocene | 0.129 | |||||||||||
Irvingtonian | 0.21 | ||||||||||||
Calabrian | Early Pleistocene | 0.774 | |||||||||||
Blancan | 1.4 | ||||||||||||
Gelasian | 1.8 | ||||||||||||
Neogene | Pliocene | Piacenzian | Late Pliocene | 2.58 | |||||||||
Zanclean | Early Pliocene | 3.6 | |||||||||||
Hemphillian | 4.7 | ||||||||||||
Miocene | Messinian | Late Miocene | 5.333 | ||||||||||
Tortonian | 7.246 | ||||||||||||
Clarendonian | 9.4 | ||||||||||||
Serravallian | Middle Miocene | 11.63 | |||||||||||
Barstovian | 12.5 | ||||||||||||
Langhian | 13.82 | ||||||||||||
Burdigalian | Early Miocene | 15.98 | |||||||||||
Hemingfordian | 16.3 | ||||||||||||
Arikareean | 18.5 | ||||||||||||
Aquitanian | 20.44 | ||||||||||||
Paleogene | Oligocene | Chattian | MP 30/MP 29/MP 28/MP 27/MP 26 | MP 25 | Late Oligocene | 23.03 | |||||||
Rupelian | MP 24/MP 23/MP 22/MP 21 | Early Oligocene | 27.82 | ||||||||||
Whitneyan | 29.5 | ||||||||||||
Orellan | 31.8 | ||||||||||||
Eocene | Priabonian | Chadronian | MP 20/MP 19/MP 18/MP 17B/MP 17A | Late Eocene | 33.9 | ||||||||
Duchesnean | 37 | ||||||||||||
Bartonian | MP 16 | Middle Eocene | 37.71 | ||||||||||
Uintan | 39.7 | ||||||||||||
Lutetian | MP 15/MP 14/MP 13/MP 12/MP 11 | 41.2 | |||||||||||
Bridgerian | 46.2 | ||||||||||||
Ypresian | MP 10/MP 8 + 9/MP 7 | Early Eocene | 47.8 | ||||||||||
Wasatchian | 50.5 | ||||||||||||
Clarkforkian | 54.9 | ||||||||||||
Paleocene | Thanetian | MP 6 | MP 1 - 5 | Late Paleocene | 56 | ||||||||
Tiffanian | 56.2 | ||||||||||||
Selandian | Middle Paleocene | 59.2 | |||||||||||
Torrejonian | 60.9 | ||||||||||||
Danian | Early Paleocene | 61.6 | |||||||||||
Puercan | 63.8 | ||||||||||||
66 |