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
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			Permian of the Salt Range	Devonian of France	Cambrian of China	Ordovician of China		Silurian of the Baltic	Cambrian of Australia
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
		Induan											251.2
		Induan				Kathwai							251.5 *
Permian	Lopingian	Changhsingian				Kathwai							251.902
													252.4 *
						Chhidru							252.9 *
		Wuchiapingian		Longtanian †		Chhidru							254.14
						Kalabagh							255 *
						Wargal							256 *
	Guadalupian	Capitanian											259.51
		Wordian											264.28
													265.3 *
						Amb							266.1 *
		Roadian				Amb							266.9
		Roadian											270.7 *
	Cisuralian	Kungurian											273.01
		Artinskian											283.5
		Sakmarian											290.1
		Asselian											293.52
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			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						Ohesaare	419.2
	Pridoli						Kaugetuma	421.7 *
	Ludlow	Ludfordian	Kuressaare				423
		Ludfordian	Paadla				423.4 *
		Gorstian	Paadla				425.6
	Wenlock	Homerian	Rootsikula				427.4
		Homerian	Jaagarahu				429.2 *
		Sheinwoodian	Jaagarahu				430.5
		Sheinwoodian	Jaani				431.8 *
	Llandovery	Telychian	Jaani				433.4
		Telychian	Adavere				434 *
		Aeronian	Adavere				438.5
		Aeronian	Raikkula				439.4 *
		Rhuddanian	Raikkula				440.8
		Rhuddanian	Juuru				441.4 *
Ordovician	Late Ordovician	Hirnantian	Hirnantian				Xiaoxita †/Shikou	Wufeng †	443.8
		Katian	Chientangkiangian					Wufeng †	445.2
		Katian	Neichianshanian/Hanjiang						449.5
		Sandbian	Neichianshanian/Hanjiang						453
	Middle Ordovician	Darriwilian	Darriwilian				Guniu †/Hulo		458.4
		Darriwilian	Darriwilian				Hunjiang †	Dawan †/Daobaowan/Ningkuo	466.3 *
		Dapingian	Dapingian						467.3
	Early Ordovician	Floian	Yiyangian						470
		Tremadocian	Xinchangian						477.7
		Tremadocian	Xinchangian					Lianghekou †	477.9 *
Cambrian	Furongian	Stage 10	Niuchehean				Taoyuanian †			Datsonian	485.4
		Stage 10	Niuchehean							Payntonian	486.8 *
		Jiangshanian	Jiangshanian							Iverian	489.5
		Paibian	Paibian							Idamean	494
		Paibian	Paibian				Waergangian †/Youshuanian			Idamean	494.9 *
	Miaolingian	Guzhangian	Series 3 †				Guzhangian			Wangcunian †	Mindyallan	497
		Guzhangian					Guzhangian				Boomerangian	499
		Drumian					Drumian				Undillan	500.5
		Drumian					Drumian				Floran	503
		Wuliuan		Stage 5 †			Wuliuan/Taijangian				Templetonian	504.5
		Wuliuan		Stage 5 †			Wuliuan/Taijangian				Ordian	507.8 *
	Series 2	Stage 4					Duyunian				Ordian	509
		Stage 4					Duyunian					510.8 *
		Stage 3					Nangaoian					514
	Terreneuvian	Stage 2					Meishucunian					521
		Fortunian					Meishucunian					529
		Fortunian					Jinnigian					530.7
													538.8