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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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			Cambrian of Britain	Silurian of England		Permian of the Pamirs	Ordovician of North America						Ordovician of Ibero-Bohemia			Cambrian of China		Cretaceous Subepochs	Obsolete Carboniferous Ages of China
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																			Senonian		66
		Campanian																					72.1
		Santonian																					83.6
		Coniacian																					86.3
		Turonian																					89.8
		Cenomanian																					93.9
	Early Cretaceous	Albian																			Gallic		100.5
		Aptian																					113
		Barremian																					121.4
		Hauterivian																			Neocomian		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							Dorashamian														251.902
	Lopingian	Wuchiapingian		Longtanian †					Dzhulfian														254.14
	Guadalupian	Capitanian							Midian														259.51
		Wordian							Midian														264.28
		Wordian							Murgabian														266.2 *
		Roadian							Murgabian														266.9
	Cisuralian	Kungurian							Kubergandian														273.01
		Kungurian							Bolorian														279.8
		Artinskian							Bolorian														283.5
		Artinskian							Yakhtashian														286
		Sakmarian							Sakmarian														290.1
		Asselian							Asselian														293.52
Carboniferous	Pennsylvanian	Gzhelian																				Mapingian †	298.9
		Kasimovian																				Mapingian †	303.7
		Kasimovian																					305.9
		Moscovian																					307
		Bashkirian																					315.2
	Mississippian	Serpukhovian			323.2
		Visean			330.9
		Tournaisian			346.7
Devonian	Late Devonian	Famennian			Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian			Adorf	372.2
	Middle Devonian	Givetian			Givetian	382.7
	Middle Devonian	Eifelian			Eifelian	387.7
	Early Devonian	Emsian			Emsian	393.3
		Pragian			Siegen	407.6
		Lochkovian			Gedinnine	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				Cincinnatian	Gamachian	Kosovian		443.8
		Katian					Gamachian	Kralodvorian		Bohdalec †	445.2
							Richmondian	Kralodvorian			446 *
							Richmondian	Berounian			449.7 *
							Maysvillian				Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Edenian					450.4 *
						Mohawkian	Chatfieldian					451.1 *
		Sandbian					Chatfieldian					453
							Turinian					453.7 *
							Turinian					Zahorany †/Vinice	Letna †	456.2 *
						Whiterockian					Canadian †	Zahorany †/Vinice		Chazyan †/Marmor	457 *
										Liben †					458 *
	Middle Ordovician	Darriwilian													458.4
								Dobrotivian							458.5 *
								Oretanian							459.7 *
										Sarka †					461.7 *
		Dapingian								Klabava †					467.3
								Arenigian							468
							Rangerian								469.1 *
	Early Ordovician	Floian				Ibexian	Blackhillsian							Jeffersonian †	Cassinian †	470
		Floian					Tulean									473.9 *
		Tremadocian					Tulean	Tremadocian								477.7
							Stairsian									480.3 *
							Skullrockian								Demingian †	482 *
Cambrian	Furongian	Stage 10					Skullrockian	Merioneth			Dolgellian/Trempealeauan						Niuchehean	Taoyuanian †	485.4
											Dolgellian/Trempealeauan								487.5
				Festiniogian							489.2 *
		Jiangshanian		Festiniogian							Jiangshanian						489.5
		Jiangshanian		Maentwrogian							Jiangshanian						493.1 *
		Paibian									Paibian						494
		Paibian									Paibian						Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian		Series 3 †				St Davids									Guzhangian	Wangcunian †	497
		Drumian															Drumian	Wangcunian †	500.5
		Wuliuan															Stage 5 †	Wuliuan/Taijangian		504.5
	Series 2	Stage 4															Caerfai	Duyunian		509
	Series 2	Stage 3																Nangaoian		514
	Terreneuvian	Stage 2							Meishucunian									521
		Fortunian							Meishucunian									529
		Fortunian							Jinnigian									530.7
																							538.8