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			Permian of North America		Cambrian of China		Devonian Subages	Cretaceous Subepochs	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