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, 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. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
  • M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view
  • J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 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
  • A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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 UnitsPermian of the PamirsObsolete Carboniferous Ages of ChinaPermian of the Russian PlatformPaleogene Mammal Ages of AsiaNorth American Mammal Subages/ZonesDevonian of Eastern North AmericaDevonian of GermanyNeogene Mammal Ages of ChinaPermo-Triassic Subages of Eastern Europe
QuaternaryPleistoceneLate PleistoceneSheridanianNihewanian0.0117
Chibanian0.129
Cudahyan/Sappan0.21
Calabrian0.774
Senecan/Rexroadian1.4
Gelasian1.8
NeogenePliocenePiacenzianTertiary †Yushean2.58
Zanclean3.6
Late Hemphillian/late Early Hemphillian/early Early Hemphillian4.7
Baodean4.9
MioceneMessinian5.333
Tortonian7.246
Late Clarendonian/Early Clarendonian9.4
Tunggurian11.1
Serravallian11.63
late Late Barstovian/early Late Barstovian/Early Barstovian12.5
LanghianShanwangian13.82
Burdigalian15.98
Late Hemingfordian/Early Hemingfordian16.3
Xiejiaan16.9
late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early ArikareeanHarrisonian18.5
Aquitanian20.44
PaleogeneOligoceneChattianTabenbulakianHsandagolian23.03
Monroecreekian23.1 *
Geringian24.7 *
RupelianKekeamuan27.82
29.5
EocenePriabonianHouldjinian/Ergilian/UlangochuianLate Chadronian/Middle Chadronian/Early Chadronian33.9
37
BartonianSharamurunian/Irdinmanhan/Arshantan37.71
Late Uintan/Early Uintan39.7
Lutetian41.2
Twinbuttean/Blacksforkian/Gardnerbuttian46.2
YpresianBumbanian47.8
Lostcabinian/Lysitean/Graybullian/Sandcouleean50.5
Cf3/Cf2/Cf154.9
PaleoceneThanetianGashatan56
Ti6/Ti5/Ti4/Ti3/Ti2/Ti156.2
Selandian59.2
To3/To2/To160.9
Danian61.6
Pu3/Pu2/Pu163.8
CretaceousLate CretaceousMaastrichtian66
Campanian72.1
Santonian83.6
Coniacian86.3
Turonian89.8
Cenomanian93.9
Early CretaceousAlbian100.5
Aptian113
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 TriassicOlenekianVokhmian247.2
Induan251.2
PermianLopingianChanghsingianDorashamian251.902
WuchiapingianLongtanian †DzhulfianLate Vyatkian/Early Vyatkian254.14
TatarianVyatkian256.8 *
GuadalupianCapitanianMidianSeverodvinianLate Severodvinian/Early Severodvinian259.51
WordianUrzhumianLate Urzhumian/Early Urzhumian264.28
Murgabian266.2 *
RoadianKazanianPovolzhianLate Kazanian/Early Kazanian266.9
Sokian270.7 *
CisuralianKungurianKubergandianKungurianIrenian/Ufimian273.01
Filipovian276.5 *
Bolorian279.8
Saraninian280.1 *
ArtinskianArtinskianSarginian283.5
Irginian285.9 *
Yakhtashian286
Burtsevian287.8 *
SakmarianSakmarianSakmarianSterlitamakian290.1
Tastubian291.7 *
AsselianAsselianAsselianShikhanian293.52
Uskalykian294.8
Surenian297.5
CarboniferousPennsylvanianGzhelianMapingian †298.9
Kasimovian303.7
305.9
Moscovian307
Bashkirian315.2
MississippianSerpukhovian323.2
Visean330.9
Tournaisian346.7
DevonianLate DevonianFamennianConewangan/Conneautan/CanadawayWocklum/Dasberg/Hemberg/Nehden358.9
FrasnianWest Fallsian/SonyeanAdorf372.2
Middle DevonianGivetianGeneseean/Taghanican/TioughnioganCazenovianGivetian382.7
EifelianSouthwoodianEifelian387.7
Early DevonianEmsianSawkillian/Deer ParkianHelderbergianEmsian393.3
PragianSiegen407.6
LochkovianGedinnine410.8
SilurianPridoli419.2
LudlowLudfordian423
Gorstian425.6
WenlockHomerian427.4
Sheinwoodian430.5
LlandoveryTelychian433.4
Aeronian438.5
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