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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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			Cambrian of China		Ordovician of Britain				Devonian of Czechoslovakia	Paleogene Mammal Ages of Asia		Cambrian Epochs	Ordovician of Ibero-Bohemia			Ordovician of North America			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											Tabenbulakian	Hsandagolian									23.03
	Oligocene	Rupelian											Kekeamuan	Hsandagolian									27.82
	Eocene	Priabonian											Houldjinian/Ergilian/Ulangochuian										33.9
		Bartonian											Sharamurunian/Irdinmanhan/Arshantan										37.71
		Lutetian																					41.2
		Ypresian												Bumbanian									47.8
	Paleocene	Thanetian											Gashatan										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 †																			254.14
	Guadalupian	Capitanian																					259.51
		Wordian																					264.28
		Roadian																					266.9
	Cisuralian	Kungurian																					273.01
		Artinskian																					283.5
		Sakmarian																					290.1
		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			358.9
	Late Devonian	Frasnian			372.2
	Middle Devonian	Givetian			Srbsko	382.7
	Middle Devonian	Eifelian			Chotec	387.7
	Early Devonian	Emsian			Daleje/Zlichovian	393.3
		Pragian			Pragian	407.6
		Lochkovian			Lochkovian	410.8
Silurian	Pridoli					419.2
	Ludlow	Ludfordian				423
	Ludlow	Gorstian				425.6
	Wenlock	Homerian				427.4
	Wenlock	Sheinwoodian				430.5
	Llandovery	Telychian				433.4
		Aeronian				438.5
		Rhuddanian				440.8
Ordovician	Late Ordovician	Hirnantian				Ashgill	Hirnantian	Kosovian	Cincinnatian	Gamachian	443.8
		Katian					Rawtheyan	Kralodvorian		Gamachian	Bohdalec †	445.2
			Richmondian				Rawtheyan			446 *
							Cautleyan			448.9 *
							Pusgillian			449.3 *
						Caradoc	Streffordian			Onnian †		449.6 *
								Berounian				449.7 *
			Maysvillian									Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
			Edenian										450.4 *
			Mohawkian						Chatfieldian				451.1 *
							Cheneyan						451.5 *
							Burrellian						452.7 *
		Sandbian											453
										Actonian †			453.2 *
									Turinian	Actonian †			453.7 *
										Marshbrookian †			Woolstonian †	454.2 *
										Longvillian †				455.2 *
														Zahorany †/Vinice	Letna †	456.2 *
							Aurelucian									456.8 *
			Whiterockian									Canadian †				Chazyan †/Marmor	457 *
										Soudleyan †/Harnagian/Costonian							457.4 *
										Soudleyan †/Harnagian/Costonian	Liben †						458 *
	Middle Ordovician	Darriwilian				Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn										458.4
								Dobrotivian									458.5 *
								Oretanian									459.7 *
							Abereiddian/Early Llanvirn										461.3 *
											Sarka †						461.7 *
		Dapingian									Klabava †						467.3
								Arenigian									468
						Arenig	Fennian										468.4 *
									Rangerian								469.1 *
	Early Ordovician	Floian	Ibexian						Blackhillsian							Jeffersonian †	Cassinian †	470
							Whitlandian		Blackhillsian									471.1 *
							Whitlandian		Tulean									473.9 *
				Moridunian			474.3 *
		Tremadocian		Tremadoc		Migneintian	Tremadocian				477.7
						Migneintian			Stairsian		480.3 *
						Cressagian			Stairsian		480.8 *
						Cressagian			Skullrockian		Demingian †						482 *
											Demingian †						485 *
Cambrian	Furongian	Stage 10					Niuchehean				Taoyuanian †	Late Cambrian							485.4
		Stage 10					Niuchehean												487.5
		Jiangshanian					Jiangshanian												489.5
		Paibian					Paibian												494
		Paibian					Paibian				Waergangian †/Youshuanian								494.9 *
	Miaolingian	Guzhangian					Series 3 †				Guzhangian	Wangcunian †							Middle Cambrian	497
		Drumian									Drumian	Wangcunian †								500.5
		Wuliuan									Stage 5 †	Wuliuan/Taijangian									504.5
	Series 2	Stage 4										Duyunian							Early Cambrian		509
	Series 2	Stage 3										Nangaoian									514
	Terreneuvian	Stage 2										Meishucunian									521
		Fortunian										Meishucunian									529
		Fortunian										Jinnigian									530.7
																							538.8