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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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
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 Australia	Cambrian of Siberia			Permo-Triassic Subages of Eastern Europe	Neogene Mammal Ages of China	Permian of the Salt Range	Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
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												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								Vokhmian							247.2
		Induan															251.2
		Induan										Kathwai					251.5 *
Permian	Lopingian	Changhsingian										Kathwai					251.902
																	252.4 *
												Chhidru					252.9 *
		Wuchiapingian		Longtanian †						Late Vyatkian/Early Vyatkian		Chhidru	Zechstein				254.14
												Kalabagh					255 *
												Wargal					256 *
	Guadalupian	Capitanian								Late Severodvinian/Early Severodvinian			Rotliegendes				259.51
		Wordian								Late Urzhumian/Early Urzhumian							264.28
																	265.3 *
					Amb	266.1 *
		Roadian			Amb	Late Kazanian/Early Kazanian	266.9
		Roadian				Late Kazanian/Early Kazanian	270.7 *
	Cisuralian	Kungurian					273.01
		Artinskian					Autunian	283.5
		Sakmarian						290.1
		Asselian						293.52
Carboniferous	Pennsylvanian	Gzhelian						298.9
		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	Ashgill					Hirnantian	443.8
		Katian						Rawtheyan	445.2
								Cautleyan	448.9 *
								Pusgillian	449.3 *
			Caradoc					Streffordian	Onnian †	449.6 *
								Cheneyan		451.5 *
								Burrellian		452.7 *
		Sandbian								453
									Actonian †	453.2 *
									Marshbrookian †	Woolstonian †	454.2 *
									Longvillian †		455.2 *
								Aurelucian	Longvillian †		456.8 *
								Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian	Llanvirn					Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian						Abereiddian/Early Llanvirn			461.3 *
		Dapingian						Abereiddian/Early Llanvirn			467.3
		Dapingian	Arenig					Fennian			468.4 *
	Early Ordovician	Floian						Fennian			470
								Whitlandian			471.1 *
								Moridunian			474.3 *
		Tremadocian	Tremadoc					Migneintian			477.7
								Cressagian			480.8 *
								Cressagian			Mansian †	483.55 *
											Mansian †	485 *
Cambrian	Furongian	Stage 10									Datsonian	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Stage 10									Payntonian				486.8 *
		Jiangshanian									Iverian				489.5
												Aksaian			490.7 *
												Sakian			492.2 *
		Paibian									Idamean				494
		Paibian									Idamean			Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian									Series 3 †	Mindyallan	Ayusokkanian			497
				Boomerangian								499	Ayusokkanian
				Boomerangian								Mayan/Menevian	499.5
		Drumian		Undillan									500.5
		Drumian		Floran									503
		Wuliuan		Stage 5 †								Templetonian	Amgan/Solvan			504.5
		Wuliuan		Stage 5 †	Ordian							507.8 *
	Series 2	Stage 4									509
											Toyonian	Lenian †	510 *
											Toyonian		510.8 *
											Botomian		512.5 *
		Stage 3					514				Botomian
		Stage 3					Atdabanian					515.6 *
	Terreneuvian	Stage 2					Tommotian					521
		Stage 2					Nemakit-Daldynian					525.5
		Fortunian					Nemakit-Daldynian				Manykaian †	529
																	538.8