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			Carboniferous of China	Devonian of Czechoslovakia	Permian of North America		Carbo-Permian of the Russian Platform	Devonian of Eastern 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						Capitanian					259.51
		Wordian						Wordian					264.28
		Wordian						Wordian		Noginskian			264.9 *
		Roadian						Roadian					266.9
	Cisuralian	Kungurian						Leonardian	Cathedralian				273.01
									Cathedralian	Pavlovoposadian			276.8 *
									Hessian				281.9 *
		Artinskian							Hessian				283.5
								Wolfcampian	Lenoxian				286.1 *
										Rusavkinian			287.6 *
		Sakmarian											290.1
		Asselian							Nealian				293.52
Carboniferous	Pennsylvanian	Gzhelian											298.9
		Gzhelian				Xiaodushanian							300 *
		Kasimovian								Dorogomilovian			303.7
					Khamovnikian		304.8
					Dalaun	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 *
					Huashibanian	Cheremshanian	318.5 *
						Prikamian	318.6 *
						Severokeltmian	319.9 *
					Lousuan	Krasnopolyanian	321.2 *
					Lousuan	Voznesenian	321.9 *
	Mississippian	Serpukhovian			Dewunian	Zapaltjubian	323.2
						Protvian	324.4 *
						Steshevian	326.8 *
			Tarusian			329 *
			Tarusian		Shangsian	330.8 *
		Visean	Venevian			330.9
			Mikhailovian			331.9 *
			Aleksinian			333.7 *
			Aleksinian		Jiusian	335 *
			Tulian			335.8 *
			Bobrikian			339.9 *
			Radaevkian			343.4 *
		Tournaisian	Tangbagouan		Kosvian	346.7
					Kizelian	350.7 *
					Cherepetian	351.9 *
					Karakubian	354.4 *
					Upinian	356.3 *
					Malevkian	357.6 *
					Gumerovian	358 *
Devonian	Late Devonian	Famennian				Conewangan/Conneautan/Canadaway	358.9
	Late Devonian	Frasnian				West Fallsian/Sonyean	372.2
	Middle Devonian	Givetian				Srbsko	Geneseean/Taghanican/Tioughniogan			Cazenovian	382.7
	Middle Devonian	Eifelian				Chotec	Southwoodian			Cazenovian	387.7
	Early Devonian	Emsian				Daleje/Zlichovian	Sawkillian/Deer Parkian			Helderbergian	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									443.8
		Katian		445.2
		Sandbian		453
	Middle Ordovician	Darriwilian		458.4
	Middle Ordovician	Dapingian		467.3
	Early Ordovician	Floian		470
	Early Ordovician	Tremadocian		Ungurian							477.7
Cambrian	Furongian	Stage 10		Batyrbaian							485.4
		Jiangshanian		Batyrbaian							489.5
				Aksaian							490.7 *
				Sakian							492.2 *
		Paibian		Sakian							494
	Miaolingian	Guzhangian		Series 3 †							Ayusokkanian	497
		Guzhangian							499.5
		Drumian						Zhanaarykian	500.5
		Drumian						Tuesaian	503
		Wuliuan						Tuesaian	Stage 5 †		504.5
		Wuliuan							Stage 5 †		505.3
	Series 2	Stage 4									509
								Toyonian			510 *
								Botomian			512.5 *
		Stage 3						Botomian			514
		Stage 3						Atdabanian			515.6 *
	Terreneuvian	Stage 2						Tommotian			521
													525.5