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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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			Cretaceous North American Land-Mammal Ages	Ordovician of the Baltic				Cambrian of Australia	Ordovician of Ibero-Bohemia				Cambrian of Britain		Permian of Western Europe	Silurian of England	Ordovician of North America
Neogene	Pliocene	Piacenzian	Tertiary †																				2.58
	Pliocene	Zanclean																					3.6
	Miocene	Messinian																					5.333
		Tortonian																					7.246
		Serravallian																					11.63
		Langhian																					13.82
		Burdigalian																					15.98
		Aquitanian																					20.44
Paleogene	Oligocene	Chattian																					23.03
	Oligocene	Rupelian																					27.82
	Eocene	Priabonian																					33.9
		Bartonian																					37.71
		Lutetian																					41.2
		Ypresian																					47.8
	Paleocene	Thanetian																					56
		Selandian																					59.2
		Danian																					61.6
Cretaceous	Late Cretaceous	Maastrichtian				Lancian/Edmontonian																	66
		Campanian				Judithian/Aquilan																	72.1
		Santonian																					83.6
		Coniacian																					86.3
		Turonian																					89.8
		Cenomanian																					93.9
	Early Cretaceous	Albian																					100.5
		Aptian																					113
		Barremian																					121.4
		Hauterivian																					125.77
		Valanginian																					132.6
		Berriasian																					139.8
Jurassic	Late Jurassic	Tithonian																					145
		Kimmeridgian																					149.2
		Oxfordian																					154.8
	Middle Jurassic	Callovian																					161.5
		Bathonian																					165.3
		Bajocian																					168.2
		Aalenian																					170.9
	Early Jurassic	Toarcian																					174.7
		Pliensbachian																					184.2
		Sinemurian																					192.9
		Hettangian																					199.5
Triassic	Late Triassic	Rhaetian																					201.4
		Norian																					208.5
		Carnian																					227
	Middle Triassic	Ladinian																					237
	Middle Triassic	Anisian																					242
	Early Triassic	Olenekian																					247.2
	Early Triassic	Induan																					251.2
Permian	Lopingian	Changhsingian																					251.902
	Lopingian	Wuchiapingian		Longtanian †														Zechstein					254.14
	Guadalupian	Capitanian																Rotliegendes					259.51
		Wordian																					264.28
		Roadian																					266.9
	Cisuralian	Kungurian																					273.01
		Artinskian																Autunian					283.5
		Sakmarian																					290.1
		Asselian																					293.52
Carboniferous	Pennsylvanian	Gzhelian																					298.9
		Kasimovian																					303.7
		Moscovian																					307
		Bashkirian																					315.2
	Mississippian	Serpukhovian																					323.2
		Visean																					330.9
		Tournaisian																					346.7
Devonian	Late Devonian	Famennian																					358.9
	Late Devonian	Frasnian			372.2
	Middle Devonian	Givetian			382.7
	Middle Devonian	Eifelian			387.7
	Early Devonian	Emsian			393.3
		Pragian			407.6
		Lochkovian			410.8
Silurian	Pridoli				Red Downtonian/Temeside Shales/Downton Castle		Whitcliffe/Leintwardine	419.2
	Pridoli				Red Downtonian/Temeside Shales/Downton Castle		Bringewood/Elton	421.3
	Ludlow	Ludfordian			Coalbrookdale		Wenlock (England)/Tickwood	423
		Gorstian						425.6
		Gorstian					Buildwas	426.4 *
	Wenlock	Homerian					Buildwas	427.4
		Homerian			Wych		Woolhope	428.4 *
		Sheinwoodian						430.5
	Llandovery	Telychian						433.4
		Telychian						436.3 *
		Aeronian						438.5
		Aeronian	Cowleigh Park		439.3 *
		Rhuddanian	Cowleigh Park		440.8
Ordovician	Late Ordovician	Hirnantian	Harju		Porkuni	Kosovian			Cincinnatian	Gamachian	443.8
		Katian			Pirgu	Kralodvorian				Gamachian	Bohdalec †	445.2
					Pirgu					Richmondian		446 *
					Vormsi							449.6 *
						Berounian						449.7 *
										Maysvillian		Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
					Nabala					Maysvillian			Johvi †	450 *
					Nabala					Edenian				450.4 *
			Viru		Rakvere					Edenian				450.6 *
					Rakvere				Mohawkian	Chatfieldian				451.1 *
					Oandu									452 *
		Sandbian			Keila								Idavere †	453
					Keila					Turinian				453.7 *
					Haljala									453.9
					Haljala									Zahorany †/Vinice	Letna †	456.2 *
					Kukruse											456.4 *
					Kukruse				Whiterockian			Canadian †				Chazyan †/Marmor	457 *
					Uhaku								Aluoja †				457.5 *
											Liben †						458 *
	Middle Ordovician	Darriwilian															458.4
						Dobrotivian											458.5 *
					Lasnamagi	Dobrotivian											458.9 *
					Lasnamagi	Oretanian											459.7 *
					Aseri												460.4 *
					Aseri						Sarka †						461.7 *
			Oeland		Kunda												462.9 *
					Kunda								Valaste †/Hunderum				464.3 *
					Volkhov												Langevoja †/Vaana/Saka		467.1 *
		Dapingian									Klabava †								467.3
						Arenigian													468
				Rangerian						469.1 *
				Rangerian	Billingen					469.3 *
	Early Ordovician	Floian		Ibexian					Blackhillsian	Jeffersonian †						Cassinian †			470
													Latorp †						470.1 *
					Hunneberg														473.7 *
									Tulean										473.9 *
		Tremadocian				Tremadocian			Tulean										477.7
									Stairsian									480.3 *
					Varangu				Stairsian									481.3 *
					Varangu				Skullrockian							Demingian †		482 *
					Pakerort											Demingian †		482.2 *
Cambrian	Furongian	Stage 10			Pakerort					Datsonian			Merioneth			Dolgellian/Trempealeauan				485.4
																				486.3 *
																				486.5
										Payntonian										486.8 *
																				487.5
																Festiniogian				489.2 *
		Jiangshanian								Iverian						Festiniogian				489.5
		Jiangshanian								Iverian						Maentwrogian				493.1 *
		Paibian								Idamean						Maentwrogian				494
	Miaolingian	Guzhangian								Series 3 †			Mindyallan			St Davids					497
		Guzhangian											Boomerangian								499
		Drumian											Undillan								500.5
		Drumian											Floran								503
		Wuliuan											Stage 5 †								Templetonian	504.5
		Wuliuan											Stage 5 †								Ordian	507.8 *
	Series 2	Stage 4														Caerfai					Ordian	509
		Stage 4																				510.8 *
		Stage 3																				514
	Terreneuvian	Stage 2																				521
	Terreneuvian	Fortunian					529
																							538.8