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, 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
  • 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
  • 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

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.

This timescale is used in the definition of 126848 collections

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International Chronostratigraphic TimescaleDevonian of Eastern North AmericaSilurian of North AmericaTen Million Year BinsCretaceous SubepochsEuropean Faunal ZonesNeogene Mammal Ages of ChinaDevonian of CzechoslovakiaOrdovician of Australia
QuaternaryHoloceneMeghalayanCenozoic 60
Northgrippian0.0042
Greenlandian0.0082
PleistoceneLate PleistoceneNihewanian0.0117
Chibanian0.129
Calabrian0.774
GelasianMN 171.8
NeogenePliocenePiacenzianMN 16Yushean2.58
MN 153.2
Zanclean3.6
MN 144.2
MN 13Baodean4.9
MioceneMessinian5.333
TortonianMN 127.246
MN 117.75
MN 108.7
MN 99.7
MN 7 + 8Tunggurian11.1
SerravallianCenozoic 511.63
MN 612.8 *
LanghianMN 5Shanwangian13.82
BurdigalianMN 415.98
MN 3Xiejiaan16.9
MN 220
Aquitanian20.44
MN 122.4
PaleogeneOligoceneChattianCenozoic 423.03
Rupelian27.82
EocenePriabonianCenozoic 333.9
Bartonian37.71
LutetianCenozoic 241.2
Ypresian47.8
PaleoceneThanetianCenozoic 156
Selandian59.2
Danian61.6
CretaceousLate CretaceousMaastrichtianCretaceous 8Senonian66
CampanianCretaceous 772.1
SantonianCretaceous 683.6
Coniacian86.3
Turonian89.8
CenomanianCretaceous 593.9
Early CretaceousAlbianCretaceous 4Gallic100.5
AptianCretaceous 3113
BarremianCretaceous 2121.4
HauterivianNeocomian125.77
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
GuadalupianCapitanian259.51
Wordian264.28
RoadianPermian 3266.9
CisuralianKungurianPermian 2273.01
Artinskian283.5
Sakmarian290.1
AsselianPermian 1293.52
CarboniferousPennsylvanianGzhelianCarboniferous 5298.9
Kasimovian303.7
MoscovianCarboniferous 4307
Bashkirian315.2
MississippianSerpukhovianCarboniferous 3323.2
ViseanCarboniferous 2330.9
TournaisianCarboniferous 1346.7
DevonianLate DevonianFamennianConewangan/Conneautan/CanadawayDevonian 5358.9
FrasnianWest Fallsian/SonyeanDevonian 4372.2
Middle DevonianGivetianGeneseean/Taghanican/TioughnioganCazenovianDevonian 3Srbsko382.7
EifelianSouthwoodianChotec387.7
Early DevonianEmsianSawkillian/Deer ParkianHelderbergianDevonian 2Daleje/Zlichovian393.3
PragianDevonian 1Pragian407.6
LochkovianLochkovian410.8
SilurianPridoliCayuganSilurian 2419.2
Niagaran422.5 *
LudlowLudfordian423
Gorstian425.6
WenlockHomerianLockportian427.4
Sheinwoodian430.5
LlandoveryTelychianOntarianSilurian 1433.4
Aeronian438.5
Alexandrian438.7 *
MedinanClinton440.1 *
440.7 *
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 *
CambrianFurongianStage 10Cambrian 5485.4
Jiangshanian489.5
Paibian494
MiaolingianGuzhangianCambrian 4497
Drumian500.5
WuliuanCambrian 3504.5
Series 2Stage 4509
Stage 3Cambrian 2514
TerreneuvianStage 2521
FortunianCambrian 1529
538.8