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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Permian of China	Ordovician of the Baltic				Permian of North America		Silurian of England		Cambrian Epochs	Carboniferous Subepochs	Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
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
	Early Triassic	Induan																		251.2
Permian	Lopingian	Changhsingian				Meishanian														251.902
		Changhsingian				Baoqingian														253.4 *
		Wuchiapingian		Longtanian †		Laoshanian											Zechstein			254.14
		Wuchiapingian		Longtanian †		Laibinian											Zechstein			257.7 *
	Guadalupian	Capitanian				Lengwuan					Capitanian						Rotliegendes			259.51
		Wordian				Kuhfengian					Wordian									264.28
		Roadian				Kuhfengian					Roadian									266.9
	Cisuralian	Kungurian				Luodianian					Leonardian	Cathedralian								273.01
		Kungurian										Hessian								281.9 *
		Artinskian															Autunian			283.5
						Longlinian														285.4 *
											Wolfcampian	Lenoxian								286.1 *
		Sakmarian										Lenoxian								290.1
		Asselian				Zisongian						Nealian								293.52
Carboniferous	Pennsylvanian	Gzhelian				Zisongian										Late Pennsylvanian				298.9
		Gzhelian																		300.1
		Kasimovian																		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						Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	419.2
	Pridoli						Red Downtonian/Temeside Shales/Downton Castle	Bringewood/Elton	421.3
	Ludlow	Ludfordian					Coalbrookdale	Wenlock (England)/Tickwood	423
		Gorstian							425.6
		Gorstian						Buildwas	426.4 *
	Wenlock	Homerian	427.4					Buildwas
		Homerian	Wych				Woolhope	428.4 *
		Sheinwoodian						430.5
	Llandovery	Telychian						433.4
		Telychian						436.3 *
		Aeronian						438.5
		Aeronian	Cowleigh Park					439.3 *
		Rhuddanian	Cowleigh Park					440.8
Ordovician	Late Ordovician	Hirnantian	Harju					Porkuni		Ashgill			Hirnantian	443.8
		Katian						Pirgu					Rawtheyan	445.2
													Cautleyan	448.9 *
													Pusgillian	449.3 *
								Vormsi		Caradoc			Streffordian	Onnian †	449.6 *
								Nabala							Johvi †	450 *
			Viru					Rakvere								450.6 *
								Rakvere					Cheneyan			451.5 *
								Oandu					Cheneyan			452 *
								Oandu					Burrellian			452.7 *
		Sandbian						Keila							Idavere †	453
								Keila						Actonian †		453.2 *
								Haljala						Actonian †		453.9
														Marshbrookian †		Woolstonian †		454.2 *
														Longvillian †				455.2 *
								Kukruse										456.4 *
													Aurelucian					456.8 *
														Soudleyan †/Harnagian/Costonian				457.4 *
								Uhaku						Soudleyan †/Harnagian/Costonian	Aluoja †			457.5 *
	Middle Ordovician	Darriwilian						Uhaku		Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn					458.4
								Lasnamagi										458.9 *
								Aseri										460.4 *
								Aseri					Abereiddian/Early Llanvirn					461.3 *
			Oeland					Kunda										462.9 *
								Kunda							Valaste †/Hunderum			464.3 *
								Volkhov										Langevoja †/Vaana/Saka	467.1 *
		Dapingian		467.3
				Arenig						Fennian			468.4 *
								Billingen					469.3 *
	Early Ordovician	Floian											470
													Latorp †					470.1 *
										Whitlandian								471.1 *
								Hunneberg		Whitlandian								473.7 *
										Moridunian								474.3 *
		Tremadocian		Tremadoc						Migneintian								477.7
										Cressagian								480.8 *
								Varangu			481.3 *
						Pakerort		482.2 *
										485 *
Cambrian	Furongian	Stage 10									Late Cambrian	485.4
												486.3 *
												486.5
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian			Series 3 †						Middle Cambrian	497
		Drumian										500.5
		Wuliuan										Stage 5 †	504.5
	Series 2	Stage 4										Early Cambrian	509
	Series 2	Stage 3											514
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
																				538.8