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. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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			Paleogene Mammal Ages of Asia		Silurian Ages of Europe	Devonian of Germany	Ten Million Year Bins	Permian of North America		Devonian of France
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												7.246
		Serravallian								Cenozoic 5				11.63
		Langhian												13.82
		Burdigalian												15.98
		Aquitanian												20.44
Paleogene	Oligocene	Chattian				Tabenbulakian	Hsandagolian			Cenozoic 4				23.03
	Oligocene	Rupelian				Kekeamuan	Hsandagolian			Cenozoic 4				27.82
	Eocene	Priabonian				Houldjinian/Ergilian/Ulangochuian				Cenozoic 3				33.9
		Bartonian				Sharamurunian/Irdinmanhan/Arshantan				Cenozoic 3				37.71
		Lutetian								Cenozoic 2				41.2
		Ypresian					Bumbanian			Cenozoic 2				47.8
	Paleocene	Thanetian				Gashatan				Cenozoic 1				56
		Selandian												59.2
		Danian												61.6
Cretaceous	Late Cretaceous	Maastrichtian								Cretaceous 8				66
		Campanian								Cretaceous 7				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										Lenoxian		290.1
		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			Wocklum/Dasberg/Hemberg/Nehden					Devonian 5	Famennian	358.9
	Late Devonian	Frasnian			Adorf					Devonian 4	Frasnian	372.2
	Middle Devonian	Givetian			Givetian					Devonian 3	Givetian	382.7
	Middle Devonian	Eifelian			Eifelian					Devonian 3	Couvinien	387.7
	Early Devonian	Emsian			Emsian					Devonian 2		393.3
		Pragian			Siegen					Devonian 1		407.6
		Pragian			Siegen						Coblencien	408.2 *
		Lochkovian			Gedinnine						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			485.4
		Jiangshanian				489.5
		Paibian				494
	Miaolingian	Guzhangian	Series 3 †			Cambrian 4				497
		Drumian				Cambrian 4				500.5
		Wuliuan		Stage 5 †		Cambrian 3				504.5
	Series 2	Stage 4				Cambrian 3				509
	Series 2	Stage 3				Cambrian 2				514
	Terreneuvian	Stage 2				Cambrian 2				521
	Terreneuvian	Fortunian				Cambrian 1				529
														538.8