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

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			Permian of the Russian Platform		Permian Subages of Germany	Cambrian of Siberia			Cambrian of North America		Devonian Subages
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													66
		Campanian													72.1
		Santonian													83.6
		Coniacian													86.3
		Turonian													89.8
		Cenomanian													93.9
	Early Cretaceous	Albian													100.5
		Aptian													113
		Barremian													121.4
		Hauterivian													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						Buntsandstein							251.902
		Wuchiapingian		Longtanian †											254.14
		Wuchiapingian		Longtanian †		Tatarian	Vyatkian								256.8 *
	Guadalupian	Capitanian					Severodvinian	Ohre/Aller							259.51
		Wordian					Urzhumian	Leine							264.28
		Roadian				Kazanian	Povolzhian								266.9
		Roadian				Kazanian	Sokian								270.7 *
	Cisuralian	Kungurian				Kungurian	Irenian/Ufimian								273.01
							Filipovian								276.5 *
							Saraninian								280.1 *
		Artinskian				Artinskian	Sarginian								283.5
							Irginian								285.9 *
							Burtsevian								287.8 *
		Sakmarian				Sakmarian	Sterlitamakian								290.1
		Sakmarian				Sakmarian	Tastubian								291.7 *
		Asselian				Asselian	Shikhanian								293.52
							Uskalykian								294.8
					Surenian		297.5
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					Late Famennian		358.9
							Middle Famennian		365.3 *
							Early Famennian		368.5 *
		Frasnian					Late Frasnian		372.2
							Middle Frasnian		375.4 *
							Early Frasnian		379.3 *
	Middle Devonian	Givetian					Late Givetian		382.7
							Middle Givetian		383.7 *
							Early Givetian		385.9 *
		Eifelian	Late Eifelian				387.7
		Eifelian	Early Eifelian				390.3 *
	Early Devonian	Emsian	Late Emsian				393.3
		Emsian	Early Emsian				398.3 *
		Pragian	Pragian				407.6
		Lochkovian	Late Lochkovian				410.8
			Middle Lochkovian				412.8 *
			Early Lochkovian				415.6 *
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					443.8
		Katian					445.2
		Sandbian					453
	Middle Ordovician	Darriwilian					458.4
	Middle Ordovician	Dapingian					467.3
	Early Ordovician	Floian					470
		Tremadocian					477.7
		Tremadocian					Mansian †		483.55 *
Cambrian	Furongian	Stage 10					Batyrbaian		Tavgian †	Ketyan †/Yurakian	Franconian †/Dresbachian/Millardan	485.4
		Stage 10										Sunwaptan	487.5
		Jiangshanian											489.5
							Aksaian						490.7 *
							Sakian						492.2 *
												Steptoean	493 *
		Paibian											494
		Paibian								Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian					Series 3 †		Ayusokkanian			Marjumian	Albertian †	497
		Guzhangian		Mayan/Menevian					499.5
		Drumian		Mayan/Menevian					500.5
		Wuliuan		Stage 5 †				Amgan/Solvan	Topazan			504.5
		Wuliuan		Stage 5 †					Delamaran			506.5
	Series 2	Stage 4										Waucoban †	509
								Toyonian		Lenian †			510 *
								Toyonian	Dyeran				511 *
								Botomian					512.5 *
		Stage 3											514
									Montezuman				514.8 *
								Atdabanian	Montezuman				515.6 *
								Atdabanian	Begadean				519.9 *
	Terreneuvian	Stage 2						Tommotian					521
		Stage 2						Nemakit-Daldynian					525.5
		Fortunian						Nemakit-Daldynian		Manykaian †			529
															538.8