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
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Devonian Subages	Carboniferous of China	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																					66
		Campanian																					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
		Gzhelian					Xiaodushanian																300 *
		Kasimovian					Xiaodushanian																303.7
		Kasimovian					Dalaun																305.8 *
		Moscovian																					307
		Bashkirian																					315.2
							Huashibanian																318.5 *
							Lousuan																321.2 *
	Mississippian	Serpukhovian			Dewunian	323.2
		Serpukhovian			Shangsian	330.8 *
		Visean			Shangsian	330.9
		Visean			Jiusian	335 *
		Tournaisian			Tangbagouan	346.7
Devonian	Late Devonian	Famennian			Late Famennian		358.9
					Middle Famennian		365.3 *
					Early Famennian		368.5 *
		Frasnian			Late Frasnian		372.2
					Middle Frasnian		375.4 *
					Early Frasnian		379.3 *
	Middle Devonian	Givetian			Late Givetian		382.7
					Middle Givetian		383.7 *
					Early Givetian		385.9 *
		Eifelian			Late Eifelian		387.7
		Eifelian			Early Eifelian		390.3 *
	Early Devonian	Emsian			Late Emsian		393.3
		Emsian	Early Emsian		398.3 *
		Pragian	Pragian		407.6
		Lochkovian	Late Lochkovian		410.8
			Middle Lochkovian		412.8 *
			Early Lochkovian		415.6 *
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			Kosovian				Cincinnatian	Gamachian	Harju	Porkuni	443.8
		Katian			Kralodvorian					Gamachian		Bohdalec †	Pirgu	445.2
										Richmondian			Pirgu	446 *
													Vormsi	449.6 *
					Berounian									449.7 *
										Maysvillian				Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian		449.8 *
										Maysvillian			Nabala			Johvi †	450 *
										Edenian			Nabala				450.4 *
										Edenian	Viru		Rakvere				450.6 *
									Mohawkian	Chatfieldian			Rakvere				451.1 *
													Oandu				452 *
		Sandbian											Keila			Idavere †	453
										Turinian			Keila				453.7 *
													Haljala				453.9
				Zahorany †/Vinice									Haljala				Letna †	456.2 *
													Kukruse					456.4 *
									Whiterockian				Kukruse	Canadian †				Chazyan †/Marmor	457 *
													Uhaku			Aluoja †			457.5 *
				Liben †															458 *
	Middle Ordovician	Darriwilian																	458.4
					Dobrotivian														458.5 *
					Dobrotivian								Lasnamagi		458.9 *
					Oretanian								Lasnamagi		459.7 *
													Aseri		460.4 *
				Sarka †									Aseri				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		Datsonian		Pakerort								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												Ordian		Caerfai						509
		Stage 4																				510.8 *
		Stage 3																				514
	Terreneuvian	Stage 2																				521
	Terreneuvian	Fortunian					529
																							538.8