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			Ordovician of Ibero-Bohemia				Permian Subages of Germany	Carboniferous Subepochs	Cambrian of Kazakhstan	Cambrian of China		Ordovician of the Baltic
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															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								Buntsandstein							251.902
	Lopingian	Wuchiapingian		Longtanian †						Buntsandstein							254.14
	Guadalupian	Capitanian								Ohre/Aller							259.51
		Wordian								Leine							264.28
		Roadian															266.9
	Cisuralian	Kungurian															273.01
		Artinskian															283.5
		Sakmarian															290.1
		Asselian															293.52
Carboniferous	Pennsylvanian	Gzhelian									Late Pennsylvanian						298.9
		Kasimovian									Late Pennsylvanian						303.7
		Moscovian									Middle Pennsylvanian						307
		Bashkirian									Early Pennsylvanian						315.2
	Mississippian	Serpukhovian									Late Mississippian						323.2
		Visean									Middle Mississippian						330.9
		Tournaisian									Early Mississippian						346.7
Devonian	Late Devonian	Famennian															358.9
	Late Devonian	Frasnian			372.2
	Middle Devonian	Givetian			382.7
	Middle Devonian	Eifelian			387.7
	Early Devonian	Emsian			393.3
		Pragian			407.6
		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			Kosovian	Harju	Porkuni	443.8
		Katian			Kralodvorian		Bohdalec †	Pirgu	445.2
					Kralodvorian			Vormsi	449.6 *
			Berounian		449.7 *			Vormsi
					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 *
						Aseri	Sarka †						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								Ungurian	477.7
						Varangu									481.3 *
						Pakerort									482.2 *
Cambrian	Furongian	Stage 10				Pakerort		Batyrbaian						Niuchehean	Taoyuanian †	485.4
																486.3 *
																486.5
		Jiangshanian												Jiangshanian		489.5
				Aksaian				490.7 *
				Sakian				492.2 *
		Paibian						Paibian		494
		Paibian						Paibian		Waergangian †/Youshuanian				494.9 *
	Miaolingian	Guzhangian		Series 3 †				Ayusokkanian		Guzhangian				Wangcunian †	497
		Guzhangian								Guzhangian					499.5
		Drumian						Zhanaarykian		Drumian					500.5
		Drumian						Tuesaian		Drumian					503
		Wuliuan						Tuesaian		Stage 5 †				Wuliuan/Taijangian		504.5
		Wuliuan								Stage 5 †				Wuliuan/Taijangian		505.3
	Series 2	Stage 4												Duyunian		509
								Toyonian								510 *
								Botomian								512.5 *
		Stage 3						Botomian						Nangaoian		514
		Stage 3						Atdabanian			515.6 *			Nangaoian
	Terreneuvian	Stage 2						Tommotian			Meishucunian			521
		Stage 2												525.5
		Fortunian												529
		Fortunian									Jinnigian			530.7
																	538.8