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				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	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	467.3						Volkhov
		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								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