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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 China			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			Hirnantian	Xiaoxita †/Shikou	Wufeng †	Harju			Porkuni	443.8
		Katian			Chientangkiangian		Wufeng †				Pirgu	445.2
					Neichianshanian/Hanjiang						Pirgu	449.5
											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			Darriwilian	Guniu †/Hulo					Uhaku		458.4
											Lasnamagi		458.9 *
											Aseri		460.4 *
								Oeland			Kunda		462.9 *
												Valaste †/Hunderum	464.3 *
						Hunjiang †	Dawan †/Daobaowan/Ningkuo						466.3 *
											Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian			Dapingian						Volkhov			467.3
		Dapingian			Dapingian						Billingen			469.3 *
	Early Ordovician	Floian			Yiyangian									470
												Latorp †		470.1 *
											Hunneberg			473.7 *
		Tremadocian		Xinchangian	477.7
					Lianghekou †		477.9 *
							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							Waergangian †/Youshuanian	494.9 *	Paibian
	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