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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 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
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			Cambrian of West Avalonia	Ordovician of Ibero-Bohemia				Neogene Mammal Ages of China	Permian of China	Cretaceous North American Land-Mammal Ages	Ordovician of the Baltic
Quaternary	Pleistocene	Late Pleistocene									Nihewanian					0.0117
		Chibanian														0.129
		Calabrian														0.774
		Gelasian														1.8
Neogene	Pliocene	Piacenzian	Tertiary †								Yushean					2.58
		Zanclean									Yushean					3.6
		Zanclean									Baodean					4.9
	Miocene	Messinian														5.333
		Tortonian														7.246
		Tortonian									Tunggurian					11.1
		Serravallian									Tunggurian					11.63
		Langhian									Shanwangian					13.82
		Burdigalian									Shanwangian					15.98
		Burdigalian									Xiejiaan					16.9
		Aquitanian									Xiejiaan					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											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										Meishanian				251.902
		Changhsingian										Baoqingian				253.4 *
		Wuchiapingian		Longtanian †								Laoshanian				254.14
		Wuchiapingian		Longtanian †								Laibinian				257.7 *
	Guadalupian	Capitanian										Lengwuan				259.51
		Wordian										Kuhfengian				264.28
		Roadian										Kuhfengian				266.9
	Cisuralian	Kungurian										Luodianian				273.01
		Artinskian										Luodianian				283.5
		Artinskian										Longlinian				285.4 *
		Sakmarian			290.1							Longlinian
		Asselian			Zisongian	293.52
Carboniferous	Pennsylvanian	Gzhelian			Zisongian	298.9
		Gzhelian				300.1
		Kasimovian				303.7
		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	Kosovian			Harju	Porkuni	443.8
		Katian	Kralodvorian				Bohdalec †	Pirgu	445.2
			Kralodvorian					Vormsi	449.6 *
			Berounian					Vormsi	449.7 *
								Nabala	Johvi †	450 *
						Viru		Rakvere		450.6 *
								Oandu		452 *
		Sandbian						Keila	Idavere †	453
								Haljala		453.9
								Haljala		Zahorany †/Vinice	Letna †	456.2 *
								Kukruse				456.4 *
								Uhaku	Aluoja †			457.5 *
							Liben †					458 *
	Middle Ordovician	Darriwilian										458.4
			Dobrotivian									458.5 *
			Dobrotivian					Lasnamagi				458.9 *
			Oretanian					Lasnamagi				459.7 *
								Aseri				460.4 *
							Sarka †	Aseri				461.7 *
						Oeland		Kunda				462.9 *
								Kunda	Valaste †/Hunderum			464.3 *
								Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian					Klabava †						467.3
			Arenigian										468
								Billingen					469.3 *
	Early Ordovician	Floian											470
									Latorp †				470.1 *
								Hunneberg					473.7 *
		Tremadocian	Tremadocian					Hunneberg					477.7
								Varangu					481.3 *
								Pakerort					482.2 *
Cambrian	Furongian	Stage 10						Pakerort					485.4
													486.3 *
						486.5
		Jiangshanian				489.5
		Paibian				494
	Miaolingian	Guzhangian				Series 3 †							497
		Guzhangian											Arcadian	498.4
		Drumian												500.5
		Wuliuan												Stage 5 †	504.5
	Series 2	Stage 4												Branchian	509
		Stage 3												Branchian	514
		Stage 3			Placentian									517.1
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
																538.8