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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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			Permo-Triassic Subages of Eastern Europe	Cambrian of China		Cambrian of Siberia			Cretaceous Subepochs	Ordovician of Britain
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														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
	Early Triassic	Induan				Vokhmian										251.2
Permian	Lopingian	Changhsingian														251.902
	Lopingian	Wuchiapingian		Longtanian †		Late Vyatkian/Early Vyatkian										254.14
	Guadalupian	Capitanian				Late Severodvinian/Early Severodvinian										259.51
		Wordian				Late Urzhumian/Early Urzhumian										264.28
		Roadian				Late Kazanian/Early Kazanian										266.9
	Cisuralian	Kungurian														273.01
		Artinskian														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							Niuchehean	Taoyuanian †	Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Jiangshanian							Jiangshanian		Batyrbaian			489.5
											Aksaian			490.7 *
											Sakian			492.2 *
		Paibian							Paibian					494
													Ensyan †/Maduan/Nganasanian	494.7 *
										Waergangian †/Youshuanian			Ensyan †/Maduan/Nganasanian	494.9 *
	Miaolingian	Guzhangian							Series 3 †	Guzhangian	Wangcunian †	Ayusokkanian			497
		Guzhangian								Guzhangian		Mayan/Menevian			499.5
		Drumian								Drumian		Mayan/Menevian			500.5
		Wuliuan		Stage 5 †						Wuliuan/Taijangian		Amgan/Solvan			504.5
	Series 2	Stage 4								Duyunian		Amgan/Solvan			509
												Toyonian	Lenian †		510 *
												Botomian			512.5 *
		Stage 3				Nangaoian				514		Botomian
		Stage 3				Nangaoian				Atdabanian			515.6 *
	Terreneuvian	Stage 2				Meishucunian				Tommotian			521
		Stage 2								Nemakit-Daldynian			525.5
		Fortunian										Manykaian †	529
		Fortunian				Jinnigian						Manykaian †	530.7
																538.8