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			Silurian of England		Cambrian of China		Devonian Subages	Permian of North America		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		Red Downtonian/Temeside Shales/Downton Castle		Whitcliffe/Leintwardine		419.2
	Pridoli		Red Downtonian/Temeside Shales/Downton Castle		Bringewood/Elton		421.3
	Ludlow	Ludfordian	Coalbrookdale		Wenlock (England)/Tickwood		423
		Gorstian					425.6
		Gorstian			Buildwas		426.4 *
	Wenlock	Homerian			Buildwas		427.4
		Homerian	Wych		Woolhope		428.4 *
		Sheinwoodian					430.5
	Llandovery	Telychian					433.4
		Telychian					436.3 *
		Aeronian					438.5
		Aeronian	Cowleigh Park				439.3 *
		Rhuddanian	Cowleigh Park				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		Niuchehean				Pakerort		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