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
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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			Cretaceous Subepochs	Obsolete Carboniferous Ages of China	Cambrian of Siberia			Cambrian Epochs	Permian of the Salt Range	Cambrian of Britain		Carboniferous Subepochs
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				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															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			Mapingian †		Late Pennsylvanian	298.9
		Kasimovian			Mapingian †			303.7
		Kasimovian						305.9
		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				477.7
						Varangu				481.3 *
						Pakerort				482.2 *
										Mansian †	483.55 *
Cambrian	Furongian	Stage 10						Batyrbaian		Tavgian †	Ketyan †/Yurakian		Late Cambrian	Merioneth	Dolgellian/Trempealeauan	485.4
																486.3 *
																486.5
															Festiniogian	489.2 *
		Jiangshanian														489.5
								Aksaian								490.7 *
				Sakian				492.2 *
								Maentwrogian							493.1 *
		Paibian													494
		Paibian									Ensyan †/Maduan/Nganasanian				494.7 *
	Miaolingian	Guzhangian		Series 3 †				Ayusokkanian					Middle Cambrian	St Davids		497
		Guzhangian						Mayan/Menevian				499.5
		Drumian						Mayan/Menevian				500.5
		Wuliuan						Stage 5 †				Amgan/Solvan				504.5
	Series 2	Stage 4										Amgan/Solvan	Early Cambrian	Caerfai		509
										Toyonian		Lenian †				510 *
										Botomian						512.5 *
		Stage 3								Botomian						514
		Stage 3			Atdabanian							515.6 *
	Terreneuvian	Stage 2			Tommotian							521
		Stage 2			Nemakit-Daldynian							525.5
		Fortunian			Nemakit-Daldynian					Manykaian †		529
																	538.8