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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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			Ordovician of Ibero-Bohemia				Ten Million Year Bins	Permian of China	Cambrian of Siberia			Devonian of Czechoslovakia	Cenozoic Subepochs	Silurian of North America		Ordovician of the Baltic
Quaternary	Holocene	Meghalayan								Cenozoic 6											0
		Northgrippian																			0.0042
		Greenlandian																			0.0082
	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								Cenozoic 5						Middle Miocene					11.63
		Langhian														Middle Miocene					13.82
		Burdigalian														Early Miocene					15.98
		Aquitanian														Early Miocene					20.44
Paleogene	Oligocene	Chattian								Cenozoic 4						Late Oligocene					23.03
	Oligocene	Rupelian								Cenozoic 4						Early Oligocene					27.82
	Eocene	Priabonian								Cenozoic 3						Late Eocene					33.9
		Bartonian								Cenozoic 3						Middle Eocene					37.71
		Lutetian								Cenozoic 2						Middle Eocene					41.2
		Ypresian								Cenozoic 2						Early Eocene					47.8
	Paleocene	Thanetian								Cenozoic 1						Late Paleocene					56
		Selandian														Middle Paleocene					59.2
		Danian														Early Paleocene					61.6
Cretaceous	Late Cretaceous	Maastrichtian								Cretaceous 8											66
		Campanian								Cretaceous 7											72.1
		Santonian								Cretaceous 6											83.6
		Coniacian																			86.3
		Turonian																			89.8
		Cenomanian								Cretaceous 5											93.9
	Early Cretaceous	Albian								Cretaceous 4											100.5
		Aptian								Cretaceous 3											113
		Barremian								Cretaceous 2											121.4
		Hauterivian								Cretaceous 2											125.77
		Valanginian								Cretaceous 1											132.6
		Berriasian								Cretaceous 1											139.8
Jurassic	Late Jurassic	Tithonian								Jurassic 6											145
		Kimmeridgian								Jurassic 5											149.2
		Oxfordian																			154.8
	Middle Jurassic	Callovian																			161.5
		Bathonian								Jurassic 4											165.3
		Bajocian								Jurassic 4											168.2
		Aalenian								Jurassic 3											170.9
	Early Jurassic	Toarcian								Jurassic 3											174.7
		Pliensbachian								Jurassic 2											184.2
		Sinemurian								Jurassic 1											192.9
		Hettangian								Jurassic 1											199.5
Triassic	Late Triassic	Rhaetian								Triassic 4											201.4
		Norian								Triassic 4											208.5
		Carnian								Triassic 3											227
	Middle Triassic	Ladinian								Triassic 2											237
	Middle Triassic	Anisian								Triassic 2											242
	Early Triassic	Olenekian								Triassic 1											247.2
	Early Triassic	Induan								Triassic 1											251.2
Permian	Lopingian	Changhsingian								Permian 4	Meishanian										251.902
		Changhsingian									Baoqingian										253.4 *
		Wuchiapingian		Longtanian †							Laoshanian										254.14
		Wuchiapingian		Longtanian †							Laibinian										257.7 *
	Guadalupian	Capitanian									Lengwuan										259.51
		Wordian									Kuhfengian										264.28
		Roadian								Permian 3	Kuhfengian										266.9
	Cisuralian	Kungurian								Permian 2	Luodianian										273.01
		Artinskian									Luodianian										283.5
		Artinskian									Longlinian										285.4 *
		Sakmarian			290.1						Longlinian
		Asselian			Permian 1	Zisongian	293.52
Carboniferous	Pennsylvanian	Gzhelian			Carboniferous 5	Zisongian	298.9
		Gzhelian					300.1
		Kasimovian					303.7
		Moscovian			Carboniferous 4		307
		Bashkirian			Carboniferous 4		315.2
	Mississippian	Serpukhovian			Carboniferous 3		323.2
		Visean			Carboniferous 2		330.9
		Tournaisian			Carboniferous 1		346.7
Devonian	Late Devonian	Famennian			Devonian 5		358.9
	Late Devonian	Frasnian			Devonian 4		372.2
	Middle Devonian	Givetian			Devonian 3		Srbsko	382.7
	Middle Devonian	Eifelian			Devonian 3		Chotec	387.7
	Early Devonian	Emsian			Devonian 2		Daleje/Zlichovian	393.3
		Pragian			Devonian 1		Pragian	407.6
		Lochkovian			Devonian 1		Lochkovian	410.8
Silurian	Pridoli				Silurian 2			Cayugan	419.2
	Pridoli							Niagaran	422.5 *
	Ludlow	Ludfordian							423
	Ludlow	Gorstian							425.6
	Wenlock	Homerian							Lockportian	427.4
	Wenlock	Sheinwoodian								430.5
	Llandovery	Telychian			Silurian 1				Ontarian	433.4
		Aeronian	438.5
			Alexandrian							438.7 *
								Medinan	Clinton	440.1 *
										440.7 *
		Rhuddanian								440.8
Ordovician	Late Ordovician	Hirnantian	Kosovian		Ordovician 5						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			Ordovician 4								Keila	Idavere †	453
													Haljala		453.9
													Haljala		Zahorany †/Vinice	Letna †	456.2 *
													Kukruse				456.4 *
													Uhaku	Aluoja †			457.5 *
												Liben †					458 *
	Middle Ordovician	Darriwilian			Ordovician 3												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 †							Ordovician 2						467.3
			Arenigian															468
													Billingen					469.3 *
	Early Ordovician	Floian																470
														Latorp †				470.1 *
													Hunneberg					473.7 *
		Tremadocian	Tremadocian									Ordovician 1	Hunneberg					477.7
				Varangu									481.3 *
				Pakerort									482.2 *
													Mansian †					483.55 *
Cambrian	Furongian	Stage 10										Cambrian 5	Batyrbaian	Tavgian †				Ketyan †/Yurakian	485.4
																			486.3 *
																			486.5
		Jiangshanian																	489.5
													Aksaian						490.7 *
													Sakian						492.2 *
		Paibian				494
		Paibian				Ensyan †/Maduan/Nganasanian												494.7 *
	Miaolingian	Guzhangian				Series 3 †						Cambrian 4	Ayusokkanian						497
		Guzhangian											Mayan/Menevian						499.5
		Drumian											Mayan/Menevian						500.5
		Wuliuan										Stage 5 †	Cambrian 3						Amgan/Solvan	504.5
	Series 2	Stage 4																	Amgan/Solvan	509
														Toyonian					Lenian †	510 *
														Botomian						512.5 *
		Stage 3											Cambrian 2	Botomian						514
		Stage 3												Atdabanian						515.6 *
	Terreneuvian	Stage 2												Tommotian						521
		Stage 2												Nemakit-Daldynian						525.5
		Fortunian											Cambrian 1	Nemakit-Daldynian					Manykaian †	529
																					538.8