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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. J. Prevosti, C. O. Romano, A. M. Forasiepi, S. Hemming, R. Bonini, A. M. Candela, E. Cerdeño, M. C. Madozzo Jaén, P. E. Ortiz, F. Pujos, L. Rasia, G. I. Schmidt, M. Taglioretti, R. D. E. MacPhee, and U. F. J. Pardiñas. 2021. New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America. Scientific Reports 2021(11):9830 view
J. J. Flynn and C. C. Swisher, III. 1995. Cenozoic South American Land Mammal Ages: correlation to global geochronology. Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication 54:317-333 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			Ordovician of Ibero-Bohemia				Cambrian of Siberia			Cambrian of North America		Devonian Subages	South American Land Mammal Ages		Cambrian of West Avalonia	Permian of China
Quaternary	Pleistocene	Late Pleistocene														Lujanian				0.0117
		Chibanian														Lujanian				0.129
		Chibanian														Ensenadan				0.3 *
		Calabrian														Ensenadan				0.774
		Calabrian														Sanandresian	Uquian †			1.7 *
		Gelasian														Sanandresian				1.8
Neogene	Pliocene	Piacenzian	Tertiary †													Vorohuean				2.58
		Piacenzian														Chapadmalalan				2.9 *
		Zanclean														Chapadmalalan				3.6
																Montehermosan				3.7 *
																Huayquerian				4.9 *
	Miocene	Messinian																		5.333
		Tortonian																		7.246
																Chasicoan				7.9 *
																Mayoan				9.9 *
																Laventan				10.9 *
		Serravallian														Laventan				11.63
		Serravallian														Colloncuran				13.7 *
		Langhian														Colloncuran				13.82
		Langhian														Friasian				15.4 *
		Burdigalian														Friasian				15.98
																Santacrucian				16.2 *
																Colhuehuapian				17.4 *
		Aquitanian														Colhuehuapian				20.44
		Aquitanian														Deseadan				20.9 *
Paleogene	Oligocene	Chattian																		23.03
		Rupelian																		27.82
		Rupelian														Tinguirirican				28.9 *
	Eocene	Priabonian														Tinguirirican				33.9
		Priabonian														Divisaderan				35.9 *
		Bartonian																		37.71
		Lutetian																		41.2
		Lutetian														Mustersan				41.9 *
		Ypresian														Mustersan				47.8
		Ypresian														Casamayoran				47.9 *
	Paleocene	Thanetian														Riochican				56
																Itaboraian				56.9 *
																Peligran				58.9 *
		Selandian																		59.2
		Danian																		61.6
		Danian														Tiupampan				62.4 *
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		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			Longlinian	290.1
		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				Late Famennian	358.9
						Middle Famennian	365.3 *
						Early Famennian	368.5 *
		Frasnian				Late Frasnian	372.2
						Middle Frasnian	375.4 *
						Early Frasnian	379.3 *
	Middle Devonian	Givetian				Late Givetian	382.7
						Middle Givetian	383.7 *
						Early Givetian	385.9 *
		Eifelian				Late Eifelian	387.7
		Eifelian				Early Eifelian	390.3 *
	Early Devonian	Emsian				Late Emsian	393.3
		Emsian				Early Emsian	398.3 *
		Pragian				Pragian	407.6
		Lochkovian	Late Lochkovian			410.8
			Middle Lochkovian			412.8 *
			Early Lochkovian			415.6 *
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	443.8
		Katian				Kralodvorian	Bohdalec †	445.2
		Katian				Berounian		449.7 *
		Sandbian						453
								Zahorany †/Vinice	Letna †	456.2 *
							Liben †			458 *
	Middle Ordovician	Darriwilian								458.4
						Dobrotivian				458.5 *
						Oretanian				459.7 *
							Sarka †			461.7 *
		Dapingian					Klabava †			467.3
		Dapingian				Arenigian				468
	Early Ordovician	Floian				Arenigian				470
		Tremadocian				Tremadocian				477.7
		Tremadocian				Tremadocian				Mansian †	483.55 *
Cambrian	Furongian	Stage 10								Batyrbaian	Tavgian †	Ketyan †/Yurakian	Franconian †/Dresbachian/Millardan	Niuchehean	Taoyuanian †	485.4
		Stage 10												Niuchehean		Sunwaptan	487.5
		Jiangshanian												Jiangshanian			489.5
										Aksaian							490.7 *
										Sakian							492.2 *
																Steptoean	493 *
		Paibian												Paibian			494
												Ensyan †/Maduan/Nganasanian					494.7 *
				Waergangian †/Youshuanian								Ensyan †/Maduan/Nganasanian			494.9 *
	Miaolingian	Guzhangian		Series 3 †						Ayusokkanian			Marjumian	Albertian †	Guzhangian	Wangcunian †	497
										Ayusokkanian							Arcadian	498.4
										Mayan/Menevian								499.5
		Drumian								Mayan/Menevian					Drumian			500.5
		Wuliuan								Stage 5 †			Amgan/Solvan		Topazan	Wuliuan/Taijangian			504.5
		Wuliuan								Stage 5 †					Delamaran	Wuliuan/Taijangian			506.5
	Series 2	Stage 4												Waucoban †		Branchian	Duyunian		509
											Toyonian		Lenian †						510 *
					Dyeran						Toyonian				511 *
											Botomian				512.5 *
		Stage 3													Nangaoian		514
					Montezuman												514.8 *
											Atdabanian						515.6 *
																Placentian	517.1
					Begadean												519.9 *
	Terreneuvian	Stage 2									Tommotian				Meishucunian		521
		Stage 2									Nemakit-Daldynian						525.5
		Fortunian											Manykaian †				529
		Fortunian											Manykaian †		Jinnigian		530.7
																				538.8