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
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			Ordovician of Ibero-Bohemia				Ordovician of Australia	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																		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																		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			Kosovian	Bolindian	Ashgill	Hirnantian	443.8
		Katian			Kralodvorian			Bohdalec †	Rawtheyan	445.2
									Cautleyan	448.9 *
			Eastonian			449 *			Cautleyan
						Pusgillian			449.3 *
						Caradoc	Streffordian		Onnian †	449.6 *
					Berounian		Streffordian			449.7 *
							Cheneyan			451.5 *
			Gisbornian				Cheneyan			452 *
							Burrellian			452.7 *
		Sandbian								453
									Actonian †	453.2 *
									Marshbrookian †	Woolstonian †	454.2 *
									Longvillian †		455.2 *
											Zahorany †/Vinice	Letna †	456.2 *
							Aurelucian						456.8 *
									Soudleyan †/Harnagian/Costonian				457.4 *
								Liben †	Soudleyan †/Harnagian/Costonian				458 *
	Middle Ordovician	Darriwilian	Darriwilian			Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn						458.4
					Dobrotivian								458.5 *
					Oretanian								459.7 *
							Abereiddian/Early Llanvirn						461.3 *
								Sarka †					461.7 *
		Dapingian	Klabava †					Yapeenian					467.3
					Arenigian								468
						Arenig	Fennian						468.4 *
								Castlemainian					468.5 *
	Early Ordovician	Floian						Chewtonian					470
							Whitlandian	Chewtonian					471.1 *
								Bendigonian					471.8 *
								Lancefieldian					473.5 *
							Moridunian						474.3 *
		Tremadocian	Tremadocian			Tremadoc	Migneintian						477.7
							Cressagian						480.8 *
								Warendian					482.8 *
				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		Botomian			514
		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