PBDB Timescale

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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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 Timescale			Obsolete Names for ICS Units			Ten Million Year Bins	Cretaceous North American Land-Mammal Ages	Permian of North America		Devonian of Germany	Cambrian of North America		Central Paratethys Stages
Quaternary	Holocene	Meghalayan				Cenozoic 6								0
		Northgrippian												0.0042
		Greenlandian												0.0082
	Pleistocene	Late Pleistocene												0.0117
		Chibanian												0.129
		Calabrian												0.774
		Gelasian												1.8
Neogene	Pliocene	Piacenzian	Tertiary †											2.58
	Pliocene	Zanclean												3.6
	Miocene	Messinian												5.333
		Tortonian											Pannonian	7.246
		Serravallian				Cenozoic 5							Sarmatian	11.63
		Serravallian											Badenian	12.8 *
		Langhian												13.82
		Burdigalian												15.98
		Aquitanian												20.44
Paleogene	Oligocene	Chattian				Cenozoic 4								23.03
	Oligocene	Rupelian				Cenozoic 4								27.82
	Eocene	Priabonian				Cenozoic 3								33.9
		Bartonian				Cenozoic 3								37.71
		Lutetian				Cenozoic 2								41.2
		Ypresian				Cenozoic 2								47.8
	Paleocene	Thanetian				Cenozoic 1								56
		Selandian												59.2
		Danian												61.6
Cretaceous	Late Cretaceous	Maastrichtian				Cretaceous 8	Lancian/Edmontonian							66
		Campanian				Cretaceous 7	Judithian/Aquilan							72.1
		Santonian				Cretaceous 6								83.6
		Coniacian												86.3
		Turonian												89.8
		Cenomanian				Cretaceous 5								93.9
	Early Cretaceous	Albian				Cretaceous 4								100.5
		Aptian				Cretaceous 3								113
		Barremian				Cretaceous 2								121.4
		Hauterivian				Cretaceous 2								125.77
		Valanginian				Cretaceous 1								132.6
		Berriasian				Cretaceous 1								139.8
Jurassic	Late Jurassic	Tithonian				Jurassic 6								145
		Kimmeridgian				Jurassic 5								149.2
		Oxfordian												154.8
	Middle Jurassic	Callovian												161.5
		Bathonian				Jurassic 4								165.3
		Bajocian				Jurassic 4								168.2
		Aalenian				Jurassic 3								170.9
	Early Jurassic	Toarcian				Jurassic 3								174.7
		Pliensbachian				Jurassic 2								184.2
		Sinemurian				Jurassic 1								192.9
		Hettangian				Jurassic 1								199.5
Triassic	Late Triassic	Rhaetian				Triassic 4								201.4
		Norian				Triassic 4								208.5
		Carnian				Triassic 3								227
	Middle Triassic	Ladinian				Triassic 2								237
	Middle Triassic	Anisian				Triassic 2								242
	Early Triassic	Olenekian				Triassic 1								247.2
	Early Triassic	Induan				Triassic 1								251.2
Permian	Lopingian	Changhsingian				Permian 4								251.902
	Lopingian	Wuchiapingian		Longtanian †										254.14
	Guadalupian	Capitanian						Capitanian						259.51
		Wordian						Wordian						264.28
		Roadian				Permian 3		Roadian						266.9
	Cisuralian	Kungurian				Permian 2		Leonardian	Cathedralian					273.01
		Kungurian							Hessian					281.9 *
		Artinskian							Hessian					283.5
		Artinskian						Wolfcampian	Lenoxian					286.1 *
		Sakmarian			290.1				Lenoxian
		Asselian			Permian 1	Nealian			293.52
Carboniferous	Pennsylvanian	Gzhelian			Carboniferous 5				298.9
		Kasimovian			Carboniferous 5				303.7
		Moscovian			Carboniferous 4				307
		Bashkirian			Carboniferous 4				315.2
	Mississippian	Serpukhovian			Carboniferous 3				323.2
		Visean			Carboniferous 2				330.9
		Tournaisian			Carboniferous 1				346.7
Devonian	Late Devonian	Famennian			Devonian 5				Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian			Devonian 4				Adorf	372.2
	Middle Devonian	Givetian			Devonian 3				Givetian	382.7
	Middle Devonian	Eifelian			Devonian 3				Eifelian	387.7
	Early Devonian	Emsian			Devonian 2				Emsian	393.3
		Pragian			Devonian 1				Siegen	407.6
		Lochkovian			Devonian 1				Gedinnine	410.8
Silurian	Pridoli				Silurian 2					419.2
	Ludlow	Ludfordian								423
	Ludlow	Gorstian								425.6
	Wenlock	Homerian								Gleedonian	427.4
		Homerian								Whitwellian	429.7 *
		Sheinwoodian									430.5
	Llandovery	Telychian			Silurian 1						433.4
		Aeronian									438.5
		Rhuddanian									440.8
Ordovician	Late Ordovician	Hirnantian	Ordovician 5		443.8
		Katian	Ordovician 5		445.2
		Sandbian	Ordovician 4		453
	Middle Ordovician	Darriwilian	Ordovician 3		458.4
	Middle Ordovician	Dapingian	Ordovician 2		467.3
	Early Ordovician	Floian	Ordovician 2		470
	Early Ordovician	Tremadocian	Ordovician 1		477.7
Cambrian	Furongian	Stage 10	Cambrian 5		Franconian †/Dresbachian/Millardan		485.4
		Stage 10					Sunwaptan				487.5
		Jiangshanian					Sunwaptan				489.5
		Jiangshanian					Steptoean				493 *
		Paibian					Steptoean				494
	Miaolingian	Guzhangian	Series 3 †		Cambrian 4		Marjumian				Albertian †	497
		Drumian			Cambrian 4		Marjumian					500.5
		Wuliuan		Stage 5 †	Cambrian 3		Topazan					504.5
		Wuliuan		Stage 5 †			Delamaran					506.5
	Series 2	Stage 4					Delamaran				Waucoban †	509
		Stage 4					Dyeran					511 *
		Stage 3			Cambrian 2		Dyeran					514
							Montezuman					514.8 *
							Begadean					519.9 *
	Terreneuvian	Stage 2										521
	Terreneuvian	Fortunian			Cambrian 1							529
														538.8