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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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 North America		Ordovician of Britain			Permo-Triassic Subages of Eastern Europe	Silurian of England		Central Paratethys Stages	Permian of Western Europe	Permian Subages of Germany
Neogene	Pliocene	Piacenzian	Tertiary †														2.58
	Pliocene	Zanclean															3.6
	Miocene	Messinian															5.333
		Tortonian												Pannonian			7.246
		Serravallian												Sarmatian			11.63
		Serravallian												Badenian			12.8 *
		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															66
		Campanian															72.1
		Santonian															83.6
		Coniacian															86.3
		Turonian															89.8
		Cenomanian															93.9
	Early Cretaceous	Albian															100.5
		Aptian															113
		Barremian															121.4
		Hauterivian															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									Vokhmian						247.2
	Early Triassic	Induan									Vokhmian						251.2
Permian	Lopingian	Changhsingian														Buntsandstein	251.902
	Lopingian	Wuchiapingian		Longtanian †							Late Vyatkian/Early Vyatkian				Zechstein	Buntsandstein	254.14
	Guadalupian	Capitanian									Late Severodvinian/Early Severodvinian				Rotliegendes	Ohre/Aller	259.51
		Wordian									Late Urzhumian/Early Urzhumian					Leine	264.28
		Roadian									Late Kazanian/Early Kazanian						266.9
	Cisuralian	Kungurian															273.01
		Artinskian													Autunian		283.5
		Sakmarian															290.1
		Asselian															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			358.9
	Late Devonian	Frasnian			372.2
	Middle Devonian	Givetian			Srbsko	382.7
	Middle Devonian	Eifelian			Chotec	387.7
	Early Devonian	Emsian			Daleje/Zlichovian	393.3
		Pragian			Pragian	407.6
		Lochkovian			Lochkovian	410.8
Silurian	Pridoli				Cayugan	Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	419.2
					Cayugan		Bringewood/Elton	421.3
					Niagaran		Bringewood/Elton	422.5 *
	Ludlow	Ludfordian				Coalbrookdale	Wenlock (England)/Tickwood	423
		Gorstian						425.6
		Gorstian					Buildwas	426.4 *
	Wenlock	Homerian					Buildwas	Lockportian	427.4
		Homerian				Wych	Woolhope	Lockportian	428.4 *
		Sheinwoodian							430.5
	Llandovery	Telychian						Ontarian	433.4
		Telychian							436.3 *
		Aeronian	438.5
			Alexandrian						438.7 *
						Cowleigh Park			439.3 *
					Medinan			Clinton	440.1 *
									440.7 *
		Rhuddanian							440.8
Ordovician	Late Ordovician	Hirnantian				Ashgill			Hirnantian	443.8
		Katian							Rawtheyan	445.2
									Cautleyan	448.9 *
									Pusgillian	449.3 *
						Caradoc			Streffordian	Onnian †		449.6 *
									Cheneyan			451.5 *
									Burrellian			452.7 *
		Sandbian										453
										Actonian †		453.2 *
										Marshbrookian †		Woolstonian †	454.2 *
										Longvillian †			455.2 *
									Aurelucian	Longvillian †			456.8 *
									Aurelucian	Soudleyan †/Harnagian/Costonian			457.4 *
	Middle Ordovician	Darriwilian				Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				458.4
		Darriwilian							Abereiddian/Early Llanvirn				461.3 *
		Dapingian							Abereiddian/Early Llanvirn				467.3
		Dapingian				Arenig			Fennian				468.4 *
	Early Ordovician	Floian							Fennian				470
									Whitlandian				471.1 *
									Moridunian				474.3 *
		Tremadocian				Tremadoc			Migneintian				477.7
						Tremadoc			Cressagian				480.8 *
													485 *
Cambrian	Furongian	Stage 10											485.4
		Jiangshanian											489.5
		Paibian											494
	Miaolingian	Guzhangian		Series 3 †									497
		Drumian											500.5
		Wuliuan											Stage 5 †	504.5
																	509