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
  • 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
  • P. L. Gibbard, M. J. Head, and M. J. C. Walker. 2010. Formal ratification of the Quaternary System/Period and the Pleistocene Series/Epoch with a base at 2.58 Ma. Journal of Quaternary Science 25(2):96-102 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
  • J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) view

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This timescale is used in the definition of 127681 collections

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International Chronostratigraphic TimescaleNorth American Land Mammal AgesMammal Paleogene ZonesCenozoic Subepochs of Southern EuropeCretaceous-Cenozoic of New Zealand
QuaternaryHoloceneMeghalayanSaintaugustineanWanganuiHaweran0
Santarosean0.0004
Northgrippian0.0042
Greenlandian0.0082
PleistoceneLate PleistoceneTarantian0.0117
Rancholabrean0.014
ChibanianIonian0.129
Irvingtonian0.21
Castlecliffian0.34
Calabrian0.774
Blancan1.4
Nukumaruan1.63
Gelasian1.8
Mangapanian2.4
NeogenePliocenePiacenzian2.58
Waipipian3
Zanclean3.6
Opoitian3.7
Hemphillian4.7
MioceneMessinianTaranakiKapitean5.333
Tongaporutuan7.2
Tortonian7.246
Clarendonian9.4
SouthlandWaiauan11.04
Serravallian11.63
Barstovian12.5
Lillburnian13.05
Langhian13.82
Clifdenian15.1
PareoraAltonian15.9
Burdigalian15.98
Hemingfordian16.3
Arikareean18.5
Otaian18.7
Aquitanian20.44
LandonWaitakian21.7
PaleogeneOligoceneChattianMP 30/MP 29/MP 28/MP 27/MP 26MP 2523.03
Duntroonian25.2
Whaingaroan27.3
RupelianMP 24/MP 23/MP 22/MP 2127.82
Whitneyan29.5
Orellan31.8
EocenePriabonianChadronianMP 20/MP 19/MP 18/MP 17B/MP 17A33.9
ArnoldRunangan34.6
Kaiatan36.7
Duchesnean37
BartonianMP 1637.71
Bortonian39.1
Uintan39.7
LutetianMP 15/MP 14/MP 13/MP 12/MP 1141.2
DannevirkePorangan42.6
Heretaungan45.7
Bridgerian46.2
YpresianMP 10/MP 8 + 9/MP 747.8
Mangaorapan48.9
Wasatchian50.5
Waipawan52
Clarkforkian54.9
PaleoceneThanetianMP 6MP 1 - 5Teurian56
Tiffanian56.2
Selandian59.2
Torrejonian60.9
Danian61.6
Puercan63.8
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