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
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			Carbo-Permian of the Russian Platform	Devonian of France	Cambrian of China		Cambrian of North America
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				Melekhovian						251.902
	Lopingian	Wuchiapingian		Longtanian †								254.14
	Guadalupian	Capitanian										259.51
		Wordian										264.28
		Wordian				Noginskian						264.9 *
		Roadian										266.9
	Cisuralian	Kungurian										273.01
		Kungurian				Pavlovoposadian						276.8 *
		Artinskian				Pavlovoposadian						283.5
		Artinskian				Rusavkinian						287.6 *
		Sakmarian										290.1
		Asselian										293.52
Carboniferous	Pennsylvanian	Gzhelian										298.9
		Kasimovian				Dorogomilovian						303.7
						Khamovnikian						304.8
						Krevyakinian						305.8 *
		Moscovian				Myachkovian						307
					Podolskian	308.9 *
					Kashirian	311.4 *
					Vereian	313.8
					Melekessian	314.8
		Bashkirian			Melekessian	315.2
					Cheremshanian	316.9 *
					Prikamian	318.6 *
					Severokeltmian	319.9 *
					Krasnopolyanian	321.2 *
					Voznesenian	321.9 *
	Mississippian	Serpukhovian			Zapaltjubian	323.2
					Protvian	324.4 *
					Steshevian	326.8 *
					Tarusian	329 *
		Visean			Venevian	330.9
					Mikhailovian	331.9 *
					Aleksinian	333.7 *
			Tulian		335.8 *
			Bobrikian		339.9 *
			Radaevkian		343.4 *
		Tournaisian	Kosvian		346.7
			Kizelian		350.7 *
			Cherepetian		351.9 *
			Karakubian		354.4 *
			Upinian		356.3 *
			Malevkian		357.6 *
			Gumerovian		358 *
Devonian	Late Devonian	Famennian			Famennian	358.9
	Late Devonian	Frasnian			Frasnian	372.2
	Middle Devonian	Givetian			Givetian	382.7
	Middle Devonian	Eifelian			Couvinien	387.7
	Early Devonian	Emsian				393.3
		Pragian				407.6
		Pragian			Coblencien	408.2 *
		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		Niuchehean		Taoyuanian †	Franconian †/Dresbachian/Millardan	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 †		Guzhangian	Wangcunian †	Marjumian	Albertian †	497
		Drumian				Drumian	Wangcunian †	Marjumian		500.5
		Wuliuan				Stage 5 †	Wuliuan/Taijangian			Topazan	504.5
		Wuliuan				Stage 5 †	Wuliuan/Taijangian			Delamaran	506.5
	Series 2	Stage 4					Duyunian		Waucoban †	Delamaran	509
		Stage 4					Duyunian			Dyeran	511 *
		Stage 3					Nangaoian			Dyeran	514
										Montezuman	514.8 *
										Begadean	519.9 *
	Terreneuvian	Stage 2					Meishucunian				521
		Fortunian					Meishucunian				529
		Fortunian					Jinnigian				530.7
												538.8