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
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			Carboniferous of China	Cambrian of North America		Cambrian of West Avalonia	Ammonite Chrons of North America			Cambrian of China		Ordovician of Britain
Quaternary	Holocene	Meghalayan														0
		Northgrippian														0.0042
		Greenlandian														0.0082
	Pleistocene	Late Pleistocene														0.0117
		Chibanian														0.129
		Calabrian														0.774
		Gelasian														1.8
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		247.2
	Early Triassic	Induan		251.2
Permian	Lopingian	Changhsingian		251.902
	Lopingian	Wuchiapingian		Longtanian †	254.14
	Guadalupian	Capitanian			259.51
		Wordian			264.28
		Roadian			266.9
	Cisuralian	Kungurian			273.01
		Artinskian			283.5
		Sakmarian			290.1
		Asselian			293.52
Carboniferous	Pennsylvanian	Gzhelian			298.9
		Gzhelian			Xiaodushanian	300 *
		Kasimovian			Xiaodushanian	303.7
		Kasimovian			Dalaun	305.8 *
		Moscovian				307
		Bashkirian				315.2
					Huashibanian	318.5 *
					Lousuan	321.2 *
	Mississippian	Serpukhovian			Dewunian	323.2
		Serpukhovian			Shangsian	330.8 *
		Visean			Shangsian	330.9
		Visean			Jiusian	335 *
		Tournaisian			Tangbagouan	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							Franconian †/Dresbachian/Millardan	Niuchehean	Taoyuanian †	485.4
		Stage 10								Niuchehean		Sunwaptan	487.5
		Jiangshanian								Jiangshanian		Sunwaptan	489.5
		Jiangshanian								Jiangshanian		Steptoean	493 *
		Paibian								Paibian			494
		Paibian								Paibian	Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian		Series 3 †					Marjumian	Albertian †	Guzhangian	Wangcunian †	497
		Guzhangian									Guzhangian		Arcadian	498.4
		Drumian									Drumian			500.5
		Wuliuan							Stage 5 †		Topazan	Wuliuan/Taijangian			504.5
		Wuliuan							Stage 5 †		Delamaran	Wuliuan/Taijangian			506.5
	Series 2	Stage 4								Waucoban †	Delamaran	Branchian	Duyunian		509
		Stage 4									Dyeran		Duyunian		511 *
		Stage 3									Dyeran		Nangaoian		514
											Montezuman				514.8 *
											Montezuman	Placentian			517.1
											Begadean				519.9 *
	Terreneuvian	Stage 2											Meishucunian		521
		Fortunian											Meishucunian		529
		Fortunian											Jinnigian		530.7
																538.8