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
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	Carboniferous of North America	Permian Subages of Germany	Devonian of Czechoslovakia	Ordovician of Australia	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												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				Vokhmian								247.2
	Early Triassic	Induan				Vokhmian								251.2
Permian	Lopingian	Changhsingian						Buntsandstein						251.902
	Lopingian	Wuchiapingian		Longtanian †		Late Vyatkian/Early Vyatkian		Buntsandstein						254.14
	Guadalupian	Capitanian				Late Severodvinian/Early Severodvinian		Ohre/Aller						259.51
		Wordian				Late Urzhumian/Early Urzhumian		Leine						264.28
		Roadian				Late Kazanian/Early Kazanian								266.9
	Cisuralian	Kungurian												273.01
		Artinskian												283.5
		Sakmarian												290.1
		Asselian					Bursumian †							293.52
Carboniferous	Pennsylvanian	Gzhelian					Virgilian							298.9
		Kasimovian					Missourian							303.7
		Kasimovian					Desmoinesian							305.9 *
		Moscovian					Desmoinesian							307
		Moscovian					Atokan							312.7 *
		Bashkirian					Atokan							315.2
		Bashkirian					Morrowan							318.4 *
	Mississippian	Serpukhovian					Chesterian							323.2
		Visean			330.9		Chesterian
					Meramecian		335.8 *
					Osagean		343.1 *
		Tournaisian			Osagean		346.7
		Tournaisian			Kinderhookian		351.9 *
Devonian	Late Devonian	Famennian					358.9
	Late Devonian	Frasnian					372.2
	Middle Devonian	Givetian					Srbsko		382.7
	Middle Devonian	Eifelian					Chotec		387.7
	Early Devonian	Emsian					Daleje/Zlichovian		393.3
		Pragian					Pragian		407.6
		Lochkovian					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	Bolindian						Harju	Porkuni	443.8
		Katian	Bolindian							Pirgu	445.2
			Eastonian							Pirgu	449 *
										Vormsi	449.6 *
										Nabala	Johvi †	450 *
									Viru	Rakvere		450.6 *
			Gisbornian							Oandu		452 *
		Sandbian								Keila	Idavere †	453
										Haljala		453.9
										Kukruse		456.4 *
										Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian	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	Yapeenian										467.3
			Castlemainian										468.5 *
			Castlemainian							Billingen			469.3 *
	Early Ordovician	Floian	Chewtonian										470
			Chewtonian								Latorp †		470.1 *
			Bendigonian										471.8 *
			Lancefieldian										473.5 *
										Hunneberg			473.7 *
		Tremadocian								Hunneberg			477.7
										Varangu			481.3 *
										Pakerort			482.2 *
			Warendian										482.8 *
Cambrian	Furongian	Stage 10									485.4
											486.3 *
									486.5
		Jiangshanian				489.5
		Paibian				494
	Miaolingian	Guzhangian				Series 3 †			497
		Drumian							500.5
		Wuliuan							Stage 5 †		504.5
														509