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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 view
M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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			Cretaceous North American Land-Mammal Ages	Cambrian of Britain		Ordovician of North America			Mammal Paleogene Zones		Obsolete Carboniferous Ages of China
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										MP 30/MP 29/MP 28/MP 27/MP 26	MP 25		23.03
	Oligocene	Rupelian										MP 24/MP 23/MP 22/MP 21	MP 25		27.82
	Eocene	Priabonian										MP 20/MP 19/MP 18/MP 17B/MP 17A			33.9
		Bartonian										MP 16			37.71
		Lutetian										MP 15/MP 14/MP 13/MP 12/MP 11			41.2
		Ypresian										MP 10/MP 8 + 9/MP 7			47.8
	Paleocene	Thanetian										MP 6	MP 1 - 5		56
		Selandian													59.2
		Danian													61.6
Cretaceous	Late Cretaceous	Maastrichtian				Lancian/Edmontonian									66
		Campanian				Judithian/Aquilan									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													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												Mapingian †	298.9
		Kasimovian												Mapingian †	303.7
		Kasimovian													305.9
		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			Cincinnatian		Gamachian	443.8
		Katian					Gamachian	445.2
			Richmondian				446 *
			Maysvillian				Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
			Edenian			450.4 *
			Mohawkian		Chatfieldian	451.1 *
		Sandbian			Chatfieldian	453
					Turinian	453.7 *
			Whiterockian			Canadian †	Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian						458.4
		Dapingian						467.3
		Dapingian			Rangerian			469.1 *
	Early Ordovician	Floian	Ibexian		Blackhillsian		Jeffersonian †	Cassinian †	470
		Floian			Tulean				473.9 *
		Tremadocian			Tulean				477.7
					Stairsian				480.3 *
					Skullrockian			Demingian †	482 *
Cambrian	Furongian	Stage 10			Skullrockian	Merioneth	Dolgellian/Trempealeauan			485.4
							Dolgellian/Trempealeauan			487.5
							Festiniogian			489.2 *
		Jiangshanian					Festiniogian			489.5
		Jiangshanian					Maentwrogian			493.1 *
		Paibian					Maentwrogian			494
	Miaolingian	Guzhangian				Series 3 †	St Davids				497
		Drumian									500.5
		Wuliuan		Stage 5 †							504.5
	Series 2	Stage 4					Caerfai				509
	Series 2	Stage 3									514
	Terreneuvian	Stage 2									521
	Terreneuvian	Fortunian									529
															538.8