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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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			Obsolete Carboniferous Ages of China	Cretaceous Subepochs	Cenozoic Subepochs	Ammonite Chrons of Northwest Europe		Permian of the Salt Range	Cambrian of North America		Permian Subages of Germany	Permian of Western Europe
Quaternary	Pleistocene	Late Pleistocene						Late Pleistocene								0.0117
		Chibanian						Middle Pleistocene								0.129
		Calabrian						Early Pleistocene								0.774
		Gelasian						Early Pleistocene								1.8
Neogene	Pliocene	Piacenzian	Tertiary †					Late Pliocene								2.58
	Pliocene	Zanclean						Early Pliocene								3.6
	Miocene	Messinian						Late Miocene								5.333
		Tortonian						Late Miocene								7.246
		Serravallian						Middle Miocene								11.63
		Langhian						Middle Miocene								13.82
		Burdigalian						Early Miocene								15.98
		Aquitanian						Early Miocene								20.44
Paleogene	Oligocene	Chattian						Late Oligocene								23.03
	Oligocene	Rupelian						Early Oligocene								27.82
	Eocene	Priabonian						Late Eocene								33.9
		Bartonian						Middle Eocene								37.71
		Lutetian						Middle Eocene								41.2
		Ypresian						Early Eocene								47.8
	Paleocene	Thanetian						Late Paleocene								56
		Selandian						Middle Paleocene								59.2
		Danian						Early Paleocene								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							Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites							168.2
		Bajocian								Humphresianum						168.4
		Aalenian							Concavum/Murchisonae/Opalinum							170.9
	Early Jurassic	Toarcian							Levesquei/Variabilis/Bifrons	Thouarsense						174.7
									Levesquei/Variabilis/Bifrons							180.1
									Serpentinum/Falciferum/Tenuicostatum							182
		Pliensbachian							Spinatum/Margaritatus/Davoei/Ibex/Jamesoni							184.2
		Sinemurian							Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi							192.9
		Hettangian							Angulata/Liasicus/Planorbis							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
		Induan														251.2
		Induan									Kathwai					251.5 *
Permian	Lopingian	Changhsingian									Kathwai			Buntsandstein		251.902
																252.4 *
											Chhidru					252.9 *
		Wuchiapingian		Longtanian †							Chhidru				Zechstein	254.14
											Kalabagh					255 *
											Wargal					256 *
	Guadalupian	Capitanian												Ohre/Aller	Rotliegendes	259.51
		Wordian												Leine		264.28
																265.3 *
					Amb	266.1 *
		Roadian			Amb						266.9
		Roadian									270.7 *
	Cisuralian	Kungurian									273.01
		Artinskian									Autunian	283.5
		Sakmarian										290.1
		Asselian										293.52
Carboniferous	Pennsylvanian	Gzhelian									Mapingian †		298.9
		Kasimovian									Mapingian †		303.7
		Kasimovian											305.9
		Moscovian											307
		Bashkirian											315.2
	Mississippian	Serpukhovian											323.2
		Visean											330.9
		Tournaisian											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	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	Franconian †/Dresbachian/Millardan				Niuchehean	Taoyuanian †					485.4
		Stage 10					Niuchehean						Sunwaptan	487.5
		Jiangshanian					Jiangshanian						Sunwaptan	489.5
		Jiangshanian					Jiangshanian						Steptoean	493 *
		Paibian					Paibian							494
		Paibian					Paibian	Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian	Series 3 †				Marjumian	Albertian †		Guzhangian			Wangcunian †	497
		Drumian					Marjumian			Drumian			Wangcunian †	500.5
		Wuliuan		Stage 5 †			Topazan			Wuliuan/Taijangian				504.5
		Wuliuan		Stage 5 †			Delamaran			Wuliuan/Taijangian				506.5
	Series 2	Stage 4					Delamaran	Waucoban †	Duyunian	509
		Stage 4					Dyeran		Duyunian	511 *
		Stage 3					Dyeran		Nangaoian	514
							Montezuman			514.8 *
							Begadean			519.9 *
	Terreneuvian	Stage 2							Meishucunian	521
		Fortunian							Meishucunian	529
		Fortunian							Jinnigian	530.7
																538.8