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. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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
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

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			Devonian of Czechoslovakia	Paleogene Mammal Ages of Asia		Cambrian Epochs	Ordovician of Ibero-Bohemia				Ordovician of North America			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					Tabenbulakian	Hsandagolian										23.03
	Oligocene	Rupelian					Kekeamuan	Hsandagolian										27.82
	Eocene	Priabonian					Houldjinian/Ergilian/Ulangochuian											33.9
		Bartonian					Sharamurunian/Irdinmanhan/Arshantan											37.71
		Lutetian																41.2
		Ypresian						Bumbanian										47.8
	Paleocene	Thanetian					Gashatan											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																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			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					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				Kosovian	Cincinnatian	Gamachian	443.8
		Katian				Kralodvorian		Gamachian	Bohdalec †	445.2
			Richmondian			Kralodvorian		446 *
			Richmondian			Berounian		449.7 *
			Maysvillian					Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian		449.8 *
			Edenian							450.4 *
			Mohawkian				Chatfieldian			451.1 *
		Sandbian					Chatfieldian			453
							Turinian			453.7 *
							Turinian			Zahorany †/Vinice	Letna †	456.2 *
			Whiterockian					Canadian †		Zahorany †/Vinice		Chazyan †/Marmor	457 *
									Liben †				458 *
	Middle Ordovician	Darriwilian											458.4
						Dobrotivian							458.5 *
						Oretanian							459.7 *
									Sarka †				461.7 *
		Dapingian							Klabava †				467.3
						Arenigian							468
							Rangerian						469.1 *
	Early Ordovician	Floian	Ibexian				Blackhillsian					Jeffersonian †	Cassinian †	470
		Floian					Tulean							473.9 *
		Tremadocian				Tremadocian	Tulean							477.7
							Stairsian							480.3 *
							Skullrockian						Demingian †	482 *
Cambrian	Furongian	Stage 10				Late Cambrian	Skullrockian								485.4
		Stage 10													487.5
		Jiangshanian													489.5
		Paibian													494
	Miaolingian	Guzhangian				Series 3 †									Middle Cambrian	497
		Drumian														500.5
		Wuliuan		Stage 5 †												504.5
	Series 2	Stage 4													Early Cambrian	509
	Series 2	Stage 3														514
	Terreneuvian	Stage 2														521
	Terreneuvian	Fortunian														529
																		538.8