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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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			Obsolete Carboniferous Ages of China	Cambrian of North America		Permian of North America		Silurian of England		Ordovician of Ibero-Bohemia				Devonian of Czechoslovakia	Cenozoic Subepochs	Silurian of North America
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				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					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		Tremadocian		Hunneberg														477.7
						Varangu														481.3 *
						Pakerort														482.2 *
Cambrian	Furongian	Stage 10		Franconian †/Dresbachian/Millardan		Pakerort															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