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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
  • J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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
  • J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view

There are 59 timescales which overlap this one. show

This timescale is used in the definition of 127262 collections

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International Chronostratigraphic TimescaleCenozoic SubepochsTen Million Year BinsPaleogene Mammal Ages of Asia
PaleogeneOligoceneChattianLate OligoceneCenozoic 4TabenbulakianHsandagolian23.03
RupelianEarly OligoceneKekeamuan27.82
EocenePriabonianLate EoceneCenozoic 3Houldjinian/Ergilian/Ulangochuian33.9
BartonianMiddle EoceneSharamurunian/Irdinmanhan/Arshantan37.71
LutetianCenozoic 241.2
YpresianEarly EoceneBumbanian47.8
PaleoceneThanetianLate PaleoceneCenozoic 1Gashatan56
SelandianMiddle Paleocene59.2
DanianEarly Paleocene61.6
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