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
  • 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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
  • B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 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 127262 collections

Show more time

Show linear time

International Chronostratigraphic TimescaleCarboniferous of ChinaCarbo-Permian of the Russian PlatformCarboniferous of Western Europe
287.6
297.7
CarboniferousPennsylvanianGzhelianRusavkinianKuzel298.9 *
Xiaodushanian300 *
StephanianStephanian C300.3 *
Stephanian B300.9 *
Stephanian A301.4 *
KasimovianDorogomilovian303.7
Khamovnikian304.8
Cantabrian305 *
DalaunKrevyakinian305.8 *
MoscovianMyachkovian307
WestphalianWestphalian D307.4 *
Podolskian308.9 *
Westphalian C309.8
Kashirian311.4 *
Vereian313.8
Westphalian B314.6
Melekessian314.8
Bashkirian315.2
Cheremshanian316.9 *
Westphalian A317 *
Huashibanian318.5 *
Prikamian318.6 *
NamurianYeadonian318.8 *
Severokeltmian319.9 *
Marsdenian320.2 *
LousuanKrasnopolyanian321.2 *
Kinderscoutian321.5 *
Voznesenian321.9 *
Alportian322 *
Chokierian323.1 *
MississippianSerpukhovianDewunianZapaltjubian323.2
Arnsbergian324 *
Protvian324.4 *
Steshevian326.8 *
Pendleian327.4 *
Tarusian329 *
Shangsian330.8 *
ViseanVenevianWarnantianBrigantian †330.9
Mikhailovian331.9 *
Aleksinian333.7 *
Jiusian335 *
Tulian335.8 *
LivianAsbian †336.3 *
Bobrikian339.9 *
MoliniacianHolkerian †/Arundian/Chadian340.2 *
Radaevkian343.4 *
TournaisianTangbagouanKosvianIvorian346.7
Kizelian350.7 *
Cherepetian351.9 *
Hastarian353.7 *
Karakubian354.4 *
Upinian356.3 *
Malevkian357.6 *
Gumerovian358 *
358.9