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			Cambrian of Kazakhstan	Cambrian of China		Carboniferous Subepochs	Ordovician of the Baltic
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											251.902
	Lopingian	Wuchiapingian		Longtanian †									254.14
	Guadalupian	Capitanian											259.51
		Wordian											264.28
		Roadian											266.9
	Cisuralian	Kungurian											273.01
		Artinskian											283.5
		Sakmarian											290.1
		Asselian											293.52
Carboniferous	Pennsylvanian	Gzhelian							Late Pennsylvanian				298.9
		Kasimovian							Late Pennsylvanian				303.7
		Moscovian							Middle Pennsylvanian				307
		Bashkirian							Early Pennsylvanian				315.2
	Mississippian	Serpukhovian							Late Mississippian				323.2
		Visean							Middle Mississippian				330.9
		Tournaisian							Early Mississippian				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			Harju	Porkuni	443.8
		Katian				Pirgu	445.2
						Vormsi	449.6 *
			Nabala			Johvi †	450 *
			Viru		Rakvere		450.6 *
					Oandu		452 *
		Sandbian			Keila	Idavere †	453
					Haljala		453.9
					Kukruse		456.4 *
					Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian			Uhaku		458.4
					Lasnamagi		458.9 *
					Aseri		460.4 *
			Oeland		Kunda		462.9 *
					Kunda	Valaste †/Hunderum	464.3 *
					Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian			Volkhov			467.3
		Dapingian			Billingen			469.3 *
	Early Ordovician	Floian						470
						Latorp †		470.1 *
					Hunneberg			473.7 *
		Tremadocian			Hunneberg			Ungurian		477.7
					Varangu					481.3 *
					Pakerort					482.2 *
Cambrian	Furongian	Stage 10			Pakerort	Batyrbaian		Niuchehean		Taoyuanian †	485.4
											486.3 *
											486.5
		Jiangshanian						Jiangshanian			489.5
						Aksaian					490.7 *
						Sakian					492.2 *
		Paibian						Paibian			494
		Paibian						Paibian		Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian				Series 3 †		Ayusokkanian		Guzhangian	Wangcunian †	497
		Guzhangian								Guzhangian		499.5
		Drumian						Zhanaarykian		Drumian		500.5
		Drumian		Tuesaian				503		Drumian
		Wuliuan		Tuesaian				Stage 5 †		Wuliuan/Taijangian		504.5
		Wuliuan						Stage 5 †		Wuliuan/Taijangian		505.3
	Series 2	Stage 4								Duyunian		509
				Toyonian								510 *
				Botomian								512.5 *
		Stage 3		Botomian						Nangaoian		514
		Stage 3		Atdabanian						Nangaoian		515.6 *
	Terreneuvian	Stage 2		Tommotian						Meishucunian		521
		Stage 2										525.5
		Fortunian										529
		Fortunian								Jinnigian		530.7
													538.8