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

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 North America		Permian of North America		Silurian of England		Ordovician of Ibero-Bohemia				Devonian of Czechoslovakia	Cenozoic Subepochs	Silurian of North America			Ordovician of the Baltic
Quaternary	Pleistocene	Late Pleistocene															Late Pleistocene					0.0117
		Chibanian															Middle Pleistocene					0.129
		Calabrian															Early Pleistocene					0.774
		Gelasian															Early Pleistocene					1.8
Neogene	Pliocene	Piacenzian	Tertiary †														Late Pliocene					2.58
	Pliocene	Zanclean															Early Pliocene					3.6
	Miocene	Messinian															Late Miocene					5.333
		Tortonian															Late Miocene					7.246
		Serravallian															Middle Miocene					11.63
		Langhian															Middle Miocene					13.82
		Burdigalian															Early Miocene					15.98
		Aquitanian															Early Miocene					20.44
Paleogene	Oligocene	Chattian															Late Oligocene					23.03
	Oligocene	Rupelian															Early Oligocene					27.82
	Eocene	Priabonian															Late Eocene					33.9
		Bartonian															Middle Eocene					37.71
		Lutetian															Middle Eocene					41.2
		Ypresian															Early Eocene					47.8
	Paleocene	Thanetian															Late Paleocene					56
		Selandian															Middle Paleocene					59.2
		Danian															Early Paleocene					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						Capitanian														259.51
		Wordian						Wordian														264.28
		Roadian						Roadian														266.9
	Cisuralian	Kungurian						Leonardian	Cathedralian													273.01
		Kungurian							Hessian													281.9 *
		Artinskian							Hessian													283.5
		Artinskian						Wolfcampian	Lenoxian													286.1 *
		Sakmarian							Lenoxian													290.1
		Asselian							Nealian													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			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				Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine				Cayugan	419.2
						Bringewood/Elton				Cayugan	421.3
						Bringewood/Elton				Niagaran	422.5 *
	Ludlow	Ludfordian			Coalbrookdale	Wenlock (England)/Tickwood					423
		Gorstian									425.6
		Gorstian				Buildwas					426.4 *
	Wenlock	Homerian				Buildwas					Lockportian	427.4
		Homerian			Wych	Woolhope					Lockportian	428.4 *
		Sheinwoodian										430.5
	Llandovery	Telychian	Ontarian								433.4
		Telychian									436.3 *
		Aeronian									438.5
											Alexandrian	438.7 *
					Cowleigh Park							439.3 *
			Medinan							Clinton		440.1 *
												440.7 *
		Rhuddanian										440.8
Ordovician	Late Ordovician	Hirnantian			Kosovian								Harju	Porkuni	443.8
		Katian			Kralodvorian									Bohdalec †	Pirgu	445.2
					Kralodvorian										Vormsi	449.6 *
					Berounian										Vormsi	449.7 *
															Nabala	Johvi †	450 *
													Viru		Rakvere		450.6 *
															Oandu		452 *
		Sandbian													Keila	Idavere †	453
															Haljala		453.9
															Haljala		Zahorany †/Vinice	Letna †	456.2 *
															Kukruse				456.4 *
															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
				Billingen											469.3 *
	Early Ordovician	Floian													470
															Latorp †				470.1 *
				Hunneberg															473.7 *
		Tremadocian		Hunneberg	Tremadocian														477.7
				Varangu															481.3 *
				Pakerort															482.2 *
Cambrian	Furongian	Stage 10		Pakerort	Franconian †/Dresbachian/Millardan															485.4
																				486.3 *
									486.5
									Sunwaptan				487.5
		Jiangshanian							Sunwaptan				489.5
		Jiangshanian							Steptoean				493 *
		Paibian							Steptoean				494
	Miaolingian	Guzhangian			Series 3 †				Marjumian				Albertian †							497
		Drumian							Marjumian											500.5
		Wuliuan							Stage 5 †											Topazan	504.5
		Wuliuan							Stage 5 †											Delamaran	506.5
	Series 2	Stage 4											Waucoban †							Delamaran	509
		Stage 4																		Dyeran	511 *
		Stage 3																		Dyeran	514
																				Montezuman	514.8 *
																				Begadean	519.9 *
	Terreneuvian	Stage 2					521
	Terreneuvian	Fortunian					529
																						538.8