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
  • J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
  • F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
  • Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
  • F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 126585 collections

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International Chronostratigraphic TimescalePaleogene Mammal Ages of AsiaCenozoic Subepochs
PaleogeneOligoceneChattianTabenbulakianHsandagolianLate Oligocene23.03
RupelianKekeamuanEarly Oligocene27.82
EocenePriabonianHouldjinian/Ergilian/UlangochuianLate Eocene33.9
BartonianSharamurunian/Irdinmanhan/ArshantanMiddle Eocene37.71
Lutetian41.2
YpresianBumbanianEarly Eocene47.8
PaleoceneThanetianGashatanLate Paleocene56
SelandianMiddle Paleocene59.2
DanianEarly Paleocene61.6
66