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
  • M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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
  • 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

Interval names marked with † are no longer in current use.

This timescale is used in the definition of 127258 collections

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International Chronostratigraphic TimescaleCenozoic SubepochsMammal Paleogene ZonesPaleogene Mammal Ages of Asia
PaleogeneOligoceneChattianLate OligoceneMP 30/MP 29/MP 28/MP 27/MP 26MP 25TabenbulakianHsandagolian23.03
RupelianEarly OligoceneMP 24/MP 23/MP 22/MP 21Kekeamuan27.82
EocenePriabonianLate EoceneMP 20/MP 19/MP 18/MP 17B/MP 17AHouldjinian/Ergilian/Ulangochuian33.9
BartonianMiddle EoceneMP 16Sharamurunian/Irdinmanhan/Arshantan37.71
LutetianMP 15/MP 14/MP 13/MP 12/MP 1141.2
YpresianEarly EoceneMP 10/MP 8 + 9/MP 7Bumbanian47.8
PaleoceneThanetianLate PaleoceneMP 6MP 1 - 5Gashatan56
SelandianMiddle Paleocene59.2
DanianEarly Paleocene61.6
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