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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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			Carboniferous of Western Europe		Permo-Triassic Subages of Eastern Europe	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						Vokhmian						247.2
	Early Triassic	Induan						Vokhmian						251.2
Permian	Lopingian	Changhsingian												251.902
	Lopingian	Wuchiapingian		Longtanian †				Late Vyatkian/Early Vyatkian						254.14
	Guadalupian	Capitanian						Late Severodvinian/Early Severodvinian						259.51
		Wordian						Late Urzhumian/Early Urzhumian						264.28
		Roadian						Late Kazanian/Early Kazanian						266.9
	Cisuralian	Kungurian												273.01
		Artinskian												283.5
		Sakmarian												290.1
		Asselian												293.52
		Asselian				Kuzel								297.7
Carboniferous	Pennsylvanian	Gzhelian				Kuzel								298.9
						Stephanian	Stephanian C							300.3 *
							Stephanian B							300.9 *
							Stephanian A							301.4 *
		Kasimovian					Stephanian A							303.7
		Kasimovian					Cantabrian							305 *
		Moscovian					Cantabrian							307
					Westphalian	Westphalian D	307.4 *
						Westphalian C	309.8
						Westphalian B	314.6
		Bashkirian				Westphalian B	315.2
						Westphalian A	317 *
					Namurian	Yeadonian	318.8 *
						Marsdenian	320.2 *
						Kinderscoutian	321.5 *
						Alportian	322 *
						Chokierian	323.1 *
	Mississippian	Serpukhovian				Chokierian	323.2
						Arnsbergian	324 *
						Pendleian	327.4 *
		Visean			Warnantian	Brigantian †	330.9
					Livian	Asbian †	336.3 *
					Moliniacian	Holkerian †/Arundian/Chadian	340.2 *
		Tournaisian			Ivorian		346.7
		Tournaisian	Hastarian		353.7 *
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			Harju		Porkuni		443.8
		Katian					Pirgu		445.2
							Vormsi		449.6 *
							Nabala		Johvi †	450 *
					Viru		Rakvere			450.6 *
							Oandu			452 *
		Sandbian					Keila		Idavere †	453
							Haljala			453.9
							Kukruse			456.4 *
							Uhaku		Aluoja †	457.5 *
	Middle Ordovician	Darriwilian					Uhaku			458.4
							Lasnamagi			458.9 *
							Aseri			460.4 *
					Oeland		Kunda			462.9 *
							Kunda		Valaste †/Hunderum	464.3 *
							Volkhov			Langevoja †/Vaana/Saka	467.1 *
		Dapingian		467.3			Volkhov
		Dapingian		Billingen			469.3 *
	Early Ordovician	Floian					470
							Latorp †		470.1 *
				Hunneberg					473.7 *
		Tremadocian		Hunneberg					477.7
				Varangu					481.3 *
				Pakerort					482.2 *
Cambrian	Furongian	Stage 10		Pakerort			Niuchehean		Taoyuanian †		485.4
											486.3 *
											486.5
		Jiangshanian					Jiangshanian				489.5
		Paibian					Paibian				494
		Paibian					Paibian		Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian					Series 3 †		Guzhangian		Wangcunian †	497
		Drumian							Drumian		Wangcunian †	500.5
		Wuliuan							Stage 5 †		Wuliuan/Taijangian		504.5
	Series 2	Stage 4									Duyunian		509
	Series 2	Stage 3									Nangaoian		514
	Terreneuvian	Stage 2									Meishucunian		521
		Fortunian									Meishucunian		529
		Fortunian									Jinnigian		530.7
														538.8