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			Devonian Subages	Permian of North America		Cretaceous Subepochs	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							Senonian					66
		Campanian												72.1
		Santonian												83.6
		Coniacian												86.3
		Turonian												89.8
		Cenomanian												93.9
	Early Cretaceous	Albian							Gallic					100.5
		Aptian												113
		Barremian												121.4
		Hauterivian							Neocomian					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			Late Famennian	358.9
					Middle Famennian	365.3 *
					Early Famennian	368.5 *
		Frasnian			Late Frasnian	372.2
					Middle Frasnian	375.4 *
					Early Frasnian	379.3 *
	Middle Devonian	Givetian			Late Givetian	382.7
					Middle Givetian	383.7 *
					Early Givetian	385.9 *
		Eifelian			Late Eifelian	387.7
		Eifelian			Early Eifelian	390.3 *
	Early Devonian	Emsian			Late Emsian	393.3
		Emsian			Early Emsian	398.3 *
		Pragian			Pragian	407.6
		Lochkovian			Late Lochkovian	410.8
					Middle Lochkovian	412.8 *
			Early Lochkovian		415.6 *
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				Volkhov					467.3
		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