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
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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			Ammonite Chrons of North America			Permian of the Russian Platform		Permo-Triassic Subages of Eastern Europe	Devonian of Germany
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				Epizigzagiceras							168.2
		Bajocian				Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense							168.4
		Aalenian				Howelli/Scissum/Westermanni							170.9
	Early Jurassic	Toarcian				Yakounensis/Hillebrandti/Crassicosta							174.7
						Planulata							179.3 *
						Planulata		Arnioceras arnouldi					179.8 *
						Kanense							181.3 *
						Carlottense							182.3 *
						Kunae							183.5 *
		Pliensbachian				Kunae							184.2
						Freboldi							185.1 *
						Whiteavesi/Imlayi	Tetraspidoceras						186.2 *
							Tetraspidoceras						189.2 *
						Plesechioceras harbledownense/Asteroceras varians/Coroniceras	Canadensis						190.3 *
		Sinemurian											192.9
						Pseudaetomoceras		Psiloceras					196.4 *
						Franziceras/Euphyllites							196.5 *
		Hettangian				Franziceras/Euphyllites							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											251.902
		Wuchiapingian		Longtanian †							Late Vyatkian/Early Vyatkian		254.14
		Wuchiapingian		Longtanian †					Tatarian	Vyatkian	Late Vyatkian/Early Vyatkian		256.8 *
	Guadalupian	Capitanian								Severodvinian	Late Severodvinian/Early Severodvinian		259.51
		Wordian								Urzhumian	Late Urzhumian/Early Urzhumian		264.28
		Roadian			Kazanian				Povolzhian	Late Kazanian/Early Kazanian	266.9
		Roadian			Kazanian				Sokian	Late Kazanian/Early Kazanian	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	Wocklum/Dasberg/Hemberg/Nehden								358.9
	Late Devonian	Frasnian	Adorf								372.2
	Middle Devonian	Givetian	Givetian								382.7
	Middle Devonian	Eifelian	Eifelian								387.7
	Early Devonian	Emsian	Emsian								393.3
		Pragian	Siegen								407.6
		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									443.8
		Katian									445.2
		Sandbian									453
	Middle Ordovician	Darriwilian									458.4
	Middle Ordovician	Dapingian									467.3
	Early Ordovician	Floian									470
	Early Ordovician	Tremadocian									477.7
Cambrian	Furongian	Stage 10									485.4
		Jiangshanian									489.5
		Paibian									494
	Miaolingian	Guzhangian									Series 3 †	497
		Drumian										500.5
		Wuliuan		Stage 5 †								504.5
													509