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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 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			Ordovician of Australia	Neogene Mammal Ages of China	Permian of North America		Cretaceous Subepochs	Cambrian of China	Ordovician of the Baltic
Quaternary	Pleistocene	Late Pleistocene					Nihewanian							0.0117
		Chibanian												0.129
		Calabrian												0.774
		Gelasian												1.8
Neogene	Pliocene	Piacenzian	Tertiary †				Yushean							2.58
		Zanclean					Yushean							3.6
		Zanclean					Baodean							4.9
	Miocene	Messinian												5.333
		Tortonian												7.246
		Tortonian					Tunggurian							11.1
		Serravallian					Tunggurian							11.63
		Langhian					Shanwangian							13.82
		Burdigalian					Shanwangian							15.98
		Burdigalian					Xiejiaan							16.9
		Aquitanian					Xiejiaan							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
	Early Triassic	Induan												251.2
Permian	Lopingian	Changhsingian												251.902
	Lopingian	Wuchiapingian		Longtanian †										254.14
	Guadalupian	Capitanian						Capitanian						259.51
		Wordian						Wordian						264.28
		Roadian						Roadian						266.9
	Cisuralian	Kungurian						Leonardian	Cathedralian					273.01
		Kungurian							Hessian					281.9 *
		Artinskian							Hessian					283.5
		Artinskian						Wolfcampian	Lenoxian					286.1 *
		Sakmarian							Lenoxian					290.1
		Asselian			Nealian	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						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					Bolindian	Harju	Porkuni		443.8
		Katian	Pirgu				Bolindian		445.2
			Pirgu				Eastonian		449 *
			Vormsi						449.6 *
			Nabala						Johvi †		450 *
			Viru					Rakvere			450.6 *
							Gisbornian	Oandu			452 *
		Sandbian						Keila	Idavere †		453
								Haljala			453.9
								Kukruse			456.4 *
								Uhaku	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian					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					Yapeenian				467.3
							Castlemainian				468.5 *
							Castlemainian	Billingen			469.3 *
	Early Ordovician	Floian					Chewtonian				470
							Chewtonian		Latorp †		470.1 *
							Bendigonian				471.8 *
							Lancefieldian				473.5 *
								Hunneberg			473.7 *
		Tremadocian						Hunneberg			477.7
								Varangu			481.3 *
								Pakerort			482.2 *
							Warendian				482.8 *
Cambrian	Furongian	Stage 10							Niuchehean		Taoyuanian †	485.4
												486.3 *
												486.5
		Jiangshanian							Jiangshanian			489.5
		Paibian		Paibian					494
		Paibian		Paibian					Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian		Series 3 †					Guzhangian		Wangcunian †	497
		Drumian							Drumian		Wangcunian †	500.5
		Wuliuan							Stage 5 †		Wuliuan/Taijangian		504.5
	Series 2	Stage 4									Duyunian		509
	Series 2	Stage 3									Nangaoian		514
	Terreneuvian	Stage 2									Meishucunian		521
		Fortunian									Meishucunian		529
		Fortunian			Jinnigian	530.7
														538.8