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
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
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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			Cambrian of Kazakhstan	Central Paratethys Stages	Ammonite Chrons of North America			Cambrian of Britain		Permian of China
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						Epizigzagiceras						168.2
		Bajocian						Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense						168.4
		Aalenian						Howelli/Scissum/Westermanni						170.9
	Early Jurassic	Toarcian						Yakounensis/Hillebrandti/Crassicosta						174.7
								Planulata						179.3 *
								Planulata		Arnioceras arnouldi				179.8 *
								Kanense						181.3 *
								Carlottense						182.3 *
								Kunae						183.5 *
		Pliensbachian						Kunae						184.2
								Freboldi						185.1 *
								Whiteavesi/Imlayi	Tetraspidoceras					186.2 *
									Tetraspidoceras					189.2 *
								Plesechioceras harbledownense/Asteroceras varians/Coroniceras	Canadensis					190.3 *
		Sinemurian												192.9
								Pseudaetomoceras		Psiloceras				196.4 *
								Franziceras/Euphyllites						196.5 *
		Hettangian						Franziceras/Euphyllites						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											Meishanian	251.902
		Changhsingian											Baoqingian	253.4 *
		Wuchiapingian		Longtanian †									Laoshanian	254.14
		Wuchiapingian		Longtanian †									Laibinian	257.7 *
	Guadalupian	Capitanian			Lengwuan	259.51
		Wordian			Kuhfengian	264.28
		Roadian			Kuhfengian	266.9
	Cisuralian	Kungurian			Luodianian	273.01
		Artinskian			Luodianian	283.5
		Artinskian			Longlinian	285.4 *
		Sakmarian			Longlinian	290.1
		Asselian			Zisongian	293.52
Carboniferous	Pennsylvanian	Gzhelian			Zisongian	298.9
		Gzhelian				300.1
		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	382.7
	Middle Devonian	Eifelian	387.7
	Early Devonian	Emsian	393.3
		Pragian	407.6
		Lochkovian	410.8
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	443.8
		Katian	445.2
		Sandbian	453
	Middle Ordovician	Darriwilian	458.4
	Middle Ordovician	Dapingian	467.3
	Early Ordovician	Floian	470
	Early Ordovician	Tremadocian	Ungurian			477.7
Cambrian	Furongian	Stage 10	Batyrbaian			Merioneth	Dolgellian/Trempealeauan				485.4
		Stage 10					Festiniogian				489.2 *
		Jiangshanian									489.5
			Aksaian								490.7 *
			Sakian								492.2 *
							Maentwrogian				493.1 *
		Paibian					Maentwrogian				494
	Miaolingian	Guzhangian	Series 3 †			Ayusokkanian	St Davids					497
		Guzhangian										499.5
		Drumian				Zhanaarykian						500.5
		Drumian				Tuesaian						503
		Wuliuan		Stage 5 †		Tuesaian						504.5
		Wuliuan		Stage 5 †								505.3
	Series 2	Stage 4					Caerfai		509
						Toyonian			510 *
						Botomian		512.5 *
		Stage 3				Botomian		514
		Stage 3				Atdabanian		515.6 *
	Terreneuvian	Stage 2				Tommotian		521
		Stage 2						525.5
		Fortunian						529
														538.8