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
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 West Avalonia	Cambrian of Britain		Cambrian of Siberia			Cretaceous Subepochs	Carboniferous Subepochs	Ordovician of the Baltic
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											Late Pennsylvanian				298.9
		Kasimovian											Late Pennsylvanian				303.7
		Moscovian											Middle Pennsylvanian				307
		Bashkirian											Early Pennsylvanian				315.2
	Mississippian	Serpukhovian											Late Mississippian				323.2
		Visean											Middle Mississippian				330.9
		Tournaisian											Early Mississippian				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			Harju	Porkuni	443.8
		Katian				Pirgu	445.2
						Vormsi	449.6 *
			Nabala			Johvi †	450 *
			Viru		Rakvere		450.6 *
					Oandu		452 *
		Sandbian			Keila	Idavere †	453
					Haljala		453.9
					Kukruse		456.4 *
					Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian			Uhaku		458.4
					Lasnamagi		458.9 *
					Aseri		460.4 *
			Oeland		Kunda		462.9 *
					Kunda	Valaste †/Hunderum	464.3 *
					Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian			Volkhov			467.3
		Dapingian			Billingen			469.3 *
	Early Ordovician	Floian						470
						Latorp †		470.1 *
					Hunneberg			473.7 *
		Tremadocian			Hunneberg			477.7
					Varangu			481.3 *
					Pakerort			482.2 *
								Mansian †	483.55 *
Cambrian	Furongian	Stage 10				Merioneth		Dolgellian/Trempealeauan	Batyrbaian	Tavgian †	Ketyan †/Yurakian			485.4
														486.3 *
														486.5
								Festiniogian						489.2 *
		Jiangshanian												489.5
									Aksaian					490.7 *
									Sakian					492.2 *
								Maentwrogian						493.1 *
		Paibian												494
		Paibian									Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian		Series 3 †		St Davids			Ayusokkanian					497
									Ayusokkanian					Arcadian	498.4
									Mayan/Menevian						499.5
		Drumian							Mayan/Menevian						500.5
		Wuliuan							Stage 5 †						Amgan/Solvan	504.5
	Series 2	Stage 4							Branchian					Caerfai	Amgan/Solvan	509
										Toyonian					Lenian †	510 *
										Botomian						512.5 *
		Stage 3								Botomian						514
										Atdabanian						515.6 *
									Placentian	Atdabanian						517.1
	Terreneuvian	Stage 2								Tommotian						521
		Stage 2								Nemakit-Daldynian						525.5
		Fortunian								Nemakit-Daldynian					Manykaian †	529
																	538.8