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
  • F. J. Prevosti, C. O. Romano, A. M. Forasiepi, S. Hemming, R. Bonini, A. M. Candela, E. Cerdeño, M. C. Madozzo Jaén, P. E. Ortiz, F. Pujos, L. Rasia, G. I. Schmidt, M. Taglioretti, R. D. E. MacPhee, and U. F. J. Pardiñas. 2021. New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America. Scientific Reports 2021(11):9830 view
  • J. J. Flynn and C. C. Swisher, III. 1995. Cenozoic South American Land Mammal Ages: correlation to global geochronology. Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication 54:317-333 view
  • F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) view
  • M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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
  • 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 127682 collections

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International Chronostratigraphic TimescaleSouth American Land Mammal AgesEuropean Faunal ZonesEuropean Faunal UnitsCenozoic Subepochs
1.7
NeogenePliocenePiacenzianVorohuean/UquianMN 16VillanyianLate Pliocene2.58 *
Chapadmalalan2.9 *
Ruscinian3.1 *
MN 153.2
ZancleanEarly Pliocene3.6
Montehermosan3.7 *
MN 144.2
HuayquerianMN 134.9 *
MioceneMessinianTurolianLate Miocene5.333
TortonianMN 127.246
MN 117.75
Chasicoan7.9 *
MN 10Vallesian8.7
MN 99.7
Mayoan9.9 *
Laventan10.9 *
MN 7 + 811.1
SerravallianAstaracianMiddle Miocene11.63
MN 612.8 *
Colloncuran13.7 *
LanghianMN 513.82
Friasian15.4 *
BurdigalianMN 4OrleanianEarly Miocene15.98
Santacrucian16.2 *
MN 316.9
Colhuehuapian17.4 *
MN 2Agenian20
Aquitanian20.44
Deseadan20.9 *
MN 122.4
23.03 *
28.9