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. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
  • 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
  • D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
  • M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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 126762 collections

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International Chronostratigraphic TimescalePermian of the Russian PlatformEuropean Faunal ZonesTen Million Year BinsDevonian of CzechoslovakiaOrdovician of AustraliaCenozoic SubepochsCambrian of SiberiaMammal Paleogene ZonesCarboniferous of China
QuaternaryHoloceneMeghalayanCenozoic 60
Northgrippian0.0042
Greenlandian0.0082
PleistoceneLate PleistoceneLate Pleistocene0.0117
ChibanianMiddle Pleistocene0.129
CalabrianEarly Pleistocene0.774
GelasianMN 171.8
NeogenePliocenePiacenzianMN 16Late Pliocene2.58
MN 153.2
ZancleanEarly Pliocene3.6
MN 144.2
MN 134.9
MioceneMessinianLate Miocene5.333
TortonianMN 127.246
MN 117.75
MN 108.7
MN 99.7
MN 7 + 811.1
SerravallianCenozoic 5Middle Miocene11.63
MN 612.8 *
LanghianMN 513.82
BurdigalianMN 4Early Miocene15.98
MN 316.9
MN 220
Aquitanian20.44
MN 122.4
PaleogeneOligoceneChattianCenozoic 4Late OligoceneMP 30/MP 29/MP 28/MP 27/MP 26MP 2523.03
RupelianEarly OligoceneMP 24/MP 23/MP 22/MP 2127.82
EocenePriabonianCenozoic 3Late EoceneMP 20/MP 19/MP 18/MP 17B/MP 17A33.9
BartonianMiddle EoceneMP 1637.71
LutetianCenozoic 2MP 15/MP 14/MP 13/MP 12/MP 1141.2
YpresianEarly EoceneMP 10/MP 8 + 9/MP 747.8
PaleoceneThanetianCenozoic 1Late PaleoceneMP 6MP 1 - 556
SelandianMiddle Paleocene59.2
DanianEarly Paleocene61.6
CretaceousLate CretaceousMaastrichtianCretaceous 866
CampanianCretaceous 772.1
SantonianCretaceous 683.6
Coniacian86.3
Turonian89.8
CenomanianCretaceous 593.9
Early CretaceousAlbianCretaceous 4100.5
AptianCretaceous 3113
BarremianCretaceous 2121.4
Hauterivian125.77
ValanginianCretaceous 1132.6
Berriasian139.8
JurassicLate JurassicTithonianJurassic 6145
KimmeridgianJurassic 5149.2
Oxfordian154.8
Middle JurassicCallovian161.5
BathonianJurassic 4165.3
Bajocian168.2
AalenianJurassic 3170.9
Early JurassicToarcian174.7
PliensbachianJurassic 2184.2
SinemurianJurassic 1192.9
Hettangian199.5
TriassicLate TriassicRhaetianTriassic 4201.4
Norian208.5
CarnianTriassic 3227
Middle TriassicLadinianTriassic 2237
Anisian242
Early TriassicOlenekianTriassic 1247.2
Induan251.2
PermianLopingianChanghsingianPermian 4251.902
Wuchiapingian254.14
TatarianVyatkian256.8 *
GuadalupianCapitanianSeverodvinian259.51
WordianUrzhumian264.28
RoadianKazanianPovolzhianPermian 3266.9
Sokian270.7 *
CisuralianKungurianKungurianIrenian/UfimianPermian 2273.01
Filipovian276.5 *
Saraninian280.1 *
ArtinskianArtinskianSarginian283.5
Irginian285.9 *
Burtsevian287.8 *
SakmarianSakmarianSterlitamakian290.1
Tastubian291.7 *
AsselianAsselianShikhanianPermian 1293.52
Uskalykian294.8
Surenian297.5
CarboniferousPennsylvanianGzhelianCarboniferous 5298.9
Xiaodushanian300 *
Kasimovian303.7
Dalaun305.8 *
MoscovianCarboniferous 4307
Bashkirian315.2
Huashibanian318.5 *
Lousuan321.2 *
MississippianSerpukhovianCarboniferous 3Dewunian323.2
Shangsian330.8 *
ViseanCarboniferous 2330.9
Jiusian335 *
TournaisianCarboniferous 1Tangbagouan346.7
DevonianLate DevonianFamennianDevonian 5358.9
FrasnianDevonian 4372.2
Middle DevonianGivetianDevonian 3Srbsko382.7
EifelianChotec387.7
Early DevonianEmsianDevonian 2Daleje/Zlichovian393.3
PragianDevonian 1Pragian407.6
LochkovianLochkovian410.8
SilurianPridoliSilurian 2419.2
LudlowLudfordian423
Gorstian425.6
WenlockHomerian427.4
Sheinwoodian430.5
LlandoveryTelychianSilurian 1433.4
Aeronian438.5
Rhuddanian440.8
OrdovicianLate OrdovicianHirnantianOrdovician 5Bolindian443.8
Katian445.2
Eastonian449 *
Gisbornian452 *
SandbianOrdovician 4453
Middle OrdovicianDarriwilianOrdovician 3Darriwilian458.4
DapingianOrdovician 2Yapeenian467.3
Castlemainian468.5 *
Early OrdovicianFloianChewtonian470
Bendigonian471.8 *
Lancefieldian473.5 *
TremadocianOrdovician 1477.7
Warendian482.8 *
Mansian †483.55 *
CambrianFurongianStage 10Cambrian 5BatyrbaianTavgian †Ketyan †/Yurakian485.4
Jiangshanian489.5
Aksaian490.7 *
Sakian492.2 *
Paibian494
Ensyan †/Maduan/Nganasanian494.7 *
MiaolingianGuzhangianCambrian 4Ayusokkanian497
Mayan/Menevian499.5
Drumian500.5
WuliuanCambrian 3Amgan/Solvan504.5
Series 2Stage 4509
ToyonianLenian †510 *
Botomian512.5 *
Stage 3Cambrian 2514
Atdabanian515.6 *
TerreneuvianStage 2Tommotian521
Nemakit-Daldynian525.5
FortunianCambrian 1Manykaian †529
538.8