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. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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			Cretaceous Subepochs	Cambrian of China		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				Senonian													66
		Campanian																	72.1
		Santonian																	83.6
		Coniacian																	86.3
		Turonian																	89.8
		Cenomanian																	93.9
	Early Cretaceous	Albian				Gallic													100.5
		Aptian																	113
		Barremian																	121.4
		Hauterivian				Neocomian													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	Tremadocian	Tulean							477.7
								Stairsian							480.3 *
								Skullrockian					Demingian †		482 *
Cambrian	Furongian	Stage 10				Niuchehean	Taoyuanian †	Skullrockian	Batyrbaian			Late Cambrian				485.4
		Stage 10				Niuchehean										487.5
		Jiangshanian				Jiangshanian										489.5
									Aksaian							490.7 *
									Sakian							492.2 *
		Paibian				Paibian										494
		Paibian				Paibian	Waergangian †/Youshuanian									494.9 *
	Miaolingian	Guzhangian				Series 3 †	Guzhangian		Wangcunian †			Ayusokkanian				Middle Cambrian	497
		Guzhangian					Guzhangian										499.5
		Drumian					Drumian					Zhanaarykian					500.5
		Drumian		Tuesaian			Drumian					503
		Wuliuan		Tuesaian			Stage 5 †		Wuliuan/Taijangian								504.5
		Wuliuan					Stage 5 †		Wuliuan/Taijangian								505.3
	Series 2	Stage 4							Duyunian							Early Cambrian	509
				Toyonian													510 *
				Botomian													512.5 *
		Stage 3		Botomian					Nangaoian								514
		Stage 3		Atdabanian					Nangaoian								515.6 *
	Terreneuvian	Stage 2		Meishucunian					Tommotian								521
		Stage 2															525.5
		Fortunian															529
		Fortunian		Jinnigian													530.7
																			538.8