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			Devonian of France	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				Famennian															358.9
	Late Devonian	Frasnian			Frasnian	372.2
	Middle Devonian	Givetian			Givetian	382.7
	Middle Devonian	Eifelian			Couvinien	387.7
	Early Devonian	Emsian				393.3
		Pragian				407.6
		Pragian			Coblencien	408.2 *
		Lochkovian			Gedinnine	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 *
			Cautleyan				Eastonian			449 *
			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										530.7				Manykaian †
																					538.8