Obsolete Names for ICS Units

The interval definitions in this timescale are derived from the following sources:

  • 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
  • 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
  • F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
  • 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 55 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 92 collections

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International Chronostratigraphic TimescaleObsolete Names for ICS UnitsSilurian of North AmericaObsolete Carboniferous Ages of ChinaPermian of the Russian PlatformCenozoic SubepochsCarboniferous of North AmericaNeogene Mammal Ages of ChinaDevonian SubagesPermian of the Salt RangeCretaceous-Cenozoic of New Zealand
QuaternaryHoloceneMeghalayanWanganuiHaweran0
Northgrippian0.0042
Greenlandian0.0082
PleistoceneLate PleistoceneLate PleistoceneNihewanian0.0117
ChibanianMiddle Pleistocene0.129
Castlecliffian0.34
CalabrianEarly Pleistocene0.774
Nukumaruan1.63
Gelasian1.8
Mangapanian2.4
NeogenePliocenePiacenzianTertiary †Late PlioceneYushean2.58
Waipipian3
ZancleanEarly Pliocene3.6
Opoitian3.7
Baodean4.9
MioceneMessinianLate MioceneTaranakiKapitean5.333
Tongaporutuan7.2
Tortonian7.246
SouthlandWaiauan11.04
Tunggurian11.1
SerravallianMiddle Miocene11.63
Lillburnian13.05
LanghianShanwangian13.82
Clifdenian15.1
PareoraAltonian15.9
BurdigalianEarly Miocene15.98
Xiejiaan16.9
Otaian18.7
Aquitanian20.44
LandonWaitakian21.7
PaleogeneOligoceneChattianLate Oligocene23.03
Duntroonian25.2
Whaingaroan27.3
RupelianEarly Oligocene27.82
EocenePriabonianLate Eocene33.9
ArnoldRunangan34.6
Kaiatan36.7
BartonianMiddle Eocene37.71
Bortonian39.1
Lutetian41.2
DannevirkePorangan42.6
Heretaungan45.7
YpresianEarly Eocene47.8
Mangaorapan48.9
Waipawan52
PaleoceneThanetianLate PaleoceneTeurian56
SelandianMiddle Paleocene59.2
DanianEarly Paleocene61.6
CretaceousLate CretaceousMaastrichtianMataHaumurian66
Campanian72.1
SantonianPiripauan83.6
RaukumaraTeratan86.1
Coniacian86.3
Turonian89.8
Mangaotanean90.5
Arowhanan93.7
Cenomanian93.9
ClarenceNgaterian95.2
Motuan99.5
Early CretaceousAlbian100.5
Urutawan103.3
TaitaiKorangan108.4
Aptian113
117.5
Barremian121.4
Hauterivian125.77
Valanginian132.6
Berriasian139.8
JurassicLate JurassicTithonian145
Kimmeridgian149.2
Oxfordian154.8
Middle JurassicCallovian161.5
Bathonian165.3
Bajocian168.2
Aalenian170.9
Early JurassicToarcian174.7
Pliensbachian184.2
Sinemurian192.9
Hettangian199.5
TriassicLate TriassicRhaetian201.4
Norian208.5
Carnian227
Middle TriassicLadinian237
Anisian242
Early TriassicOlenekian247.2
Induan251.2
Kathwai251.5 *
PermianLopingianChanghsingian251.902
252.4 *
Chhidru252.9 *
WuchiapingianLongtanian †254.14
Kalabagh255 *
Wargal256 *
TatarianVyatkian256.8 *
GuadalupianCapitanianSeverodvinian259.51
WordianUrzhumian264.28
265.3 *
Amb266.1 *
RoadianKazanianPovolzhian266.9
Sokian270.7 *
CisuralianKungurianKungurianIrenian/Ufimian273.01
Filipovian276.5 *
Saraninian280.1 *
ArtinskianArtinskianSarginian283.5
Irginian285.9 *
Burtsevian287.8 *
SakmarianSakmarianSterlitamakian290.1
Tastubian291.7 *
AsselianAsselianShikhanianBursumian †293.52
Uskalykian294.8
Surenian297.5
CarboniferousPennsylvanianGzhelianMapingian †Virgilian298.9
KasimovianMissourian303.7
Desmoinesian305.9 *
Moscovian307
Atokan312.7 *
Bashkirian315.2
Morrowan318.4 *
MississippianSerpukhovianChesterian323.2
Visean330.9
Meramecian335.8 *
Osagean343.1 *
Tournaisian346.7
Kinderhookian351.9 *
DevonianLate DevonianFamennianLate Famennian358.9
Middle Famennian365.3 *
Early Famennian368.5 *
FrasnianLate Frasnian372.2
Middle Frasnian375.4 *
Early Frasnian379.3 *
Middle DevonianGivetianLate Givetian382.7
Middle Givetian383.7 *
Early Givetian385.9 *
EifelianLate Eifelian387.7
Early Eifelian390.3 *
Early DevonianEmsianLate Emsian393.3
Early Emsian398.3 *
PragianPragian407.6
LochkovianLate Lochkovian410.8
Middle Lochkovian412.8 *
Early Lochkovian415.6 *
SilurianPridoliCayugan419.2
Niagaran422.5 *
LudlowLudfordian423
Gorstian425.6
WenlockHomerianLockportian427.4
Sheinwoodian430.5
LlandoveryTelychianOntarian433.4
Aeronian438.5
Alexandrian438.7 *
MedinanClinton440.1 *
440.7 *
Rhuddanian440.8
OrdovicianLate OrdovicianHirnantian443.8
Katian445.2
Sandbian453
Middle OrdovicianDarriwilian458.4
Dapingian467.3
Early OrdovicianFloian470
Tremadocian477.7
CambrianFurongianStage 10485.4
Jiangshanian489.5
Paibian494
MiaolingianGuzhangianSeries 3 †497
Drumian500.5
WuliuanStage 5 †504.5
509