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
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
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			Cambrian of Kazakhstan	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				Ungurian	Tulean		Tremadocian						477.7
							Stairsian								480.3 *
							Skullrockian						Demingian †		482 *
Cambrian	Furongian	Stage 10				Batyrbaian	Skullrockian	Late Cambrian								485.4
		Stage 10														487.5
		Jiangshanian														489.5
						Aksaian										490.7 *
						Sakian										492.2 *
		Paibian				Sakian										494
	Miaolingian	Guzhangian				Series 3 †		Ayusokkanian								Middle Cambrian	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														Early Cambrian	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