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. 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
  • F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
  • B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 126662 collections

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International Chronostratigraphic TimescaleCretaceous-Cenozoic of New ZealandCenozoic Subepochs
21.7
PaleogeneOligoceneChattianLandonWaitakianLate Oligocene23.03
Duntroonian25.2
Whaingaroan27.3
RupelianEarly Oligocene27.82
EocenePriabonianLate Eocene33.9
ArnoldRunangan34.6
Kaiatan36.7
BartonianMiddle Eocene37.71
Bortonian39.1
Lutetian41.2
DannevirkePorangan42.6
Heretaungan45.7
YpresianEarly Eocene47.8
Mangaorapan48.9
Waipawan52
PaleoceneThanetianTeurianLate Paleocene56
SelandianMiddle Paleocene59.2
DanianEarly Paleocene61.6
66