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. 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
  • 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
  • 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

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 127249 collections

Show more time

Show linear time

International Chronostratigraphic TimescaleTen Million Year BinsCarboniferous of ChinaCarbo-Permian of the Russian Platform
287.6
CarboniferousPennsylvanianGzhelianCarboniferous 5Rusavkinian298.9 *
Xiaodushanian300 *
KasimovianDorogomilovian303.7
Khamovnikian304.8
DalaunKrevyakinian305.8 *
MoscovianCarboniferous 4Myachkovian307
Podolskian308.9 *
Kashirian311.4 *
Vereian313.8
Melekessian314.8
Bashkirian315.2
Cheremshanian316.9 *
Huashibanian318.5 *
Prikamian318.6 *
Severokeltmian319.9 *
LousuanKrasnopolyanian321.2 *
Voznesenian321.9 *
MississippianSerpukhovianCarboniferous 3DewunianZapaltjubian323.2
Protvian324.4 *
Steshevian326.8 *
Tarusian329 *
Shangsian330.8 *
ViseanCarboniferous 2Venevian330.9
Mikhailovian331.9 *
Aleksinian333.7 *
Jiusian335 *
Tulian335.8 *
Bobrikian339.9 *
Radaevkian343.4 *
TournaisianCarboniferous 1TangbagouanKosvian346.7
Kizelian350.7 *
Cherepetian351.9 *
Karakubian354.4 *
Upinian356.3 *
Malevkian357.6 *
Gumerovian358 *
358.9