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
- M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view
- J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 view
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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 126342 collections
International Chronostratigraphic Timescale | North American Mammal Subages/Zones | Mammal Paleogene Zones | Cenozoic Subepochs | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Quaternary | Holocene | Meghalayan | 0 | |||||||||
Northgrippian | 0.0042 | |||||||||||
Greenlandian | 0.0082 | |||||||||||
Pleistocene | Late Pleistocene | Sheridanian | Late Pleistocene | 0.0117 | ||||||||
Chibanian | Middle Pleistocene | 0.129 | ||||||||||
Cudahyan/Sappan | 0.21 | |||||||||||
Calabrian | Early Pleistocene | 0.774 | ||||||||||
Senecan/Rexroadian | 1.4 | |||||||||||
Gelasian | 1.8 | |||||||||||
Neogene | Pliocene | Piacenzian | Late Pliocene | 2.58 | ||||||||
Zanclean | Early Pliocene | 3.6 | ||||||||||
Late Hemphillian/late Early Hemphillian/early Early Hemphillian | 4.7 | |||||||||||
Miocene | Messinian | Late Miocene | 5.333 | |||||||||
Tortonian | 7.246 | |||||||||||
Late Clarendonian/Early Clarendonian | 9.4 | |||||||||||
Serravallian | Middle Miocene | 11.63 | ||||||||||
late Late Barstovian/early Late Barstovian/Early Barstovian | 12.5 | |||||||||||
Langhian | 13.82 | |||||||||||
Burdigalian | Early Miocene | 15.98 | ||||||||||
Late Hemingfordian/Early Hemingfordian | 16.3 | |||||||||||
late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early Arikareean | Harrisonian | 18.5 | ||||||||||
Aquitanian | 20.44 | |||||||||||
Paleogene | Oligocene | Chattian | MP 30/MP 29/MP 28/MP 27/MP 26 | MP 25 | Late Oligocene | 23.03 | ||||||
Monroecreekian | 23.1 * | |||||||||||
Geringian | 24.7 * | |||||||||||
Rupelian | MP 24/MP 23/MP 22/MP 21 | Early Oligocene | 27.82 | |||||||||
29.5 | ||||||||||||
Eocene | Priabonian | Late Chadronian/Middle Chadronian/Early Chadronian | MP 20/MP 19/MP 18/MP 17B/MP 17A | Late Eocene | 33.9 | |||||||
37 | ||||||||||||
Bartonian | MP 16 | Middle Eocene | 37.71 | |||||||||
Late Uintan/Early Uintan | 39.7 | |||||||||||
Lutetian | MP 15/MP 14/MP 13/MP 12/MP 11 | 41.2 | ||||||||||
Twinbuttean/Blacksforkian/Gardnerbuttian | 46.2 | |||||||||||
Ypresian | MP 10/MP 8 + 9/MP 7 | Early Eocene | 47.8 | |||||||||
Lostcabinian/Lysitean/Graybullian/Sandcouleean | 50.5 | |||||||||||
Cf3/Cf2/Cf1 | 54.9 | |||||||||||
Paleocene | Thanetian | MP 6 | MP 1 - 5 | Late Paleocene | 56 | |||||||
Ti6/Ti5/Ti4/Ti3/Ti2/Ti1 | 56.2 | |||||||||||
Selandian | Middle Paleocene | 59.2 | ||||||||||
To3/To2/To1 | 60.9 | |||||||||||
Danian | Early Paleocene | 61.6 | ||||||||||
Pu3/Pu2/Pu1 | 63.8 | |||||||||||
66 |