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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
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		Permo-Triassic Subages of Eastern Europe	Ammonite Chrons of North America			Ordovician of Britain
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										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			Vokhmian							247.2
	Early Triassic	Induan			Vokhmian							251.2
Permian	Lopingian	Changhsingian										251.902
	Lopingian	Wuchiapingian		Longtanian †	Late Vyatkian/Early Vyatkian							254.14
	Guadalupian	Capitanian			Late Severodvinian/Early Severodvinian							259.51
		Wordian			Late Urzhumian/Early Urzhumian							264.28
		Roadian			Late Kazanian/Early Kazanian							266.9
	Cisuralian	Kungurian			273.01
		Artinskian			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			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	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