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
F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) 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			Cenozoic Subepochs	Permian of the Russian Platform		European Faunal Zones	Devonian of Czechoslovakia	Silurian Ages of Europe	Ten Million Year Bins	Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
Quaternary	Holocene	Meghalayan										Cenozoic 6				0
		Northgrippian														0.0042
		Greenlandian														0.0082
	Pleistocene	Late Pleistocene				Late Pleistocene										0.0117
		Chibanian				Middle Pleistocene										0.129
		Calabrian				Early Pleistocene										0.774
		Gelasian				Early Pleistocene			MN 17							1.8
Neogene	Pliocene	Piacenzian	Tertiary †			Late Pliocene			MN 16							2.58
		Piacenzian				Late Pliocene			MN 15							3.2
		Zanclean				Early Pliocene			MN 15							3.6
									MN 14							4.2
									MN 13							4.9
	Miocene	Messinian				Late Miocene			MN 13							5.333
		Tortonian							MN 12							7.246
									MN 11							7.75
									MN 10							8.7
									MN 9							9.7
									MN 7 + 8							11.1
		Serravallian				Middle Miocene			MN 7 + 8			Cenozoic 5				11.63
		Serravallian							MN 6							12.8 *
		Langhian							MN 5							13.82
		Burdigalian				Early Miocene			MN 4							15.98
									MN 3							16.9
									MN 2							20
		Aquitanian							MN 2							20.44
		Aquitanian							MN 1							22.4
Paleogene	Oligocene	Chattian				Late Oligocene						Cenozoic 4				23.03
	Oligocene	Rupelian				Early Oligocene						Cenozoic 4				27.82
	Eocene	Priabonian				Late Eocene						Cenozoic 3				33.9
		Bartonian				Middle Eocene						Cenozoic 3				37.71
		Lutetian				Middle Eocene						Cenozoic 2				41.2
		Ypresian				Early Eocene						Cenozoic 2				47.8
	Paleocene	Thanetian				Late Paleocene						Cenozoic 1				56
		Selandian				Middle Paleocene										59.2
		Danian				Early Paleocene										61.6
Cretaceous	Late Cretaceous	Maastrichtian										Cretaceous 8		Senonian		66
		Campanian										Cretaceous 7				72.1
		Santonian										Cretaceous 6				83.6
		Coniacian														86.3
		Turonian														89.8
		Cenomanian										Cretaceous 5				93.9
	Early Cretaceous	Albian										Cretaceous 4		Gallic		100.5
		Aptian										Cretaceous 3				113
		Barremian										Cretaceous 2				121.4
		Hauterivian										Cretaceous 2		Neocomian		125.77
		Valanginian										Cretaceous 1				132.6
		Berriasian										Cretaceous 1				139.8
Jurassic	Late Jurassic	Tithonian										Jurassic 6				145
		Kimmeridgian										Jurassic 5				149.2
		Oxfordian														154.8
	Middle Jurassic	Callovian														161.5
		Bathonian										Jurassic 4				165.3
		Bajocian										Jurassic 4				168.2
		Aalenian										Jurassic 3				170.9
	Early Jurassic	Toarcian										Jurassic 3				174.7
		Pliensbachian										Jurassic 2				184.2
		Sinemurian										Jurassic 1				192.9
		Hettangian										Jurassic 1				199.5
Triassic	Late Triassic	Rhaetian										Triassic 4				201.4
		Norian										Triassic 4				208.5
		Carnian										Triassic 3				227
	Middle Triassic	Ladinian										Triassic 2				237
	Middle Triassic	Anisian										Triassic 2				242
	Early Triassic	Olenekian										Triassic 1				247.2
	Early Triassic	Induan		251.2								Triassic 1
Permian	Lopingian	Changhsingian		Permian 4	251.902
		Wuchiapingian			Longtanian †		Zechstein	254.14
		Wuchiapingian			Longtanian †		Zechstein	Tatarian		Vyatkian	256.8 *
	Guadalupian	Capitanian					Severodvinian			Rotliegendes	259.51
		Wordian					Urzhumian				264.28
		Roadian		Kazanian			Povolzhian	Permian 3			266.9
		Roadian		Kazanian			Sokian	Permian 3			270.7 *
	Cisuralian	Kungurian		Kungurian			Irenian/Ufimian	Permian 2			273.01
							Filipovian				276.5 *
							Saraninian				280.1 *
		Artinskian		Artinskian			Sarginian			Autunian	283.5
							Irginian				285.9 *
							Burtsevian				287.8 *
		Sakmarian		Sakmarian			Sterlitamakian				290.1
		Sakmarian		Sakmarian			Tastubian				291.7 *
		Asselian		Asselian			Shikhanian	Permian 1			293.52
							Uskalykian				294.8
							Surenian				297.5
Carboniferous	Pennsylvanian	Gzhelian						Carboniferous 5			298.9
		Kasimovian						Carboniferous 5			303.7
		Moscovian						Carboniferous 4			307
		Bashkirian						Carboniferous 4			315.2
	Mississippian	Serpukhovian						Carboniferous 3			323.2
		Visean						Carboniferous 2			330.9
		Tournaisian						Carboniferous 1			346.7
Devonian	Late Devonian	Famennian						Devonian 5	358.9
	Late Devonian	Frasnian						Devonian 4	372.2
	Middle Devonian	Givetian						Srbsko	Devonian 3		382.7
	Middle Devonian	Eifelian						Chotec	Devonian 3		387.7
	Early Devonian	Emsian						Daleje/Zlichovian	Devonian 2		393.3
		Pragian						Pragian	Devonian 1		407.6
		Lochkovian						Lochkovian	Devonian 1		410.8
Silurian	Pridoli								Silurian 2		419.2
	Ludlow	Ludfordian									423
	Ludlow	Gorstian	425.6
	Wenlock	Homerian	Gleedonian			427.4
		Homerian	Whitwellian			429.7 *
		Sheinwoodian				430.5
	Llandovery	Telychian				Silurian 1			433.4
		Aeronian							438.5
		Rhuddanian							440.8
Ordovician	Late Ordovician	Hirnantian				Ordovician 5			Ashgill		Hirnantian	443.8
		Katian									Rawtheyan	445.2
											Cautleyan	448.9 *
											Pusgillian	449.3 *
									Caradoc		Streffordian	Onnian †	449.6 *
											Cheneyan		451.5 *
											Burrellian		452.7 *
		Sandbian				Ordovician 4							453
												Actonian †	453.2 *
												Marshbrookian †	Woolstonian †	454.2 *
												Longvillian †		455.2 *
											Aurelucian	Longvillian †		456.8 *
											Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian				Ordovician 3			Llanvirn		Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian				Ordovician 3					Abereiddian/Early Llanvirn			461.3 *
		Dapingian				Ordovician 2					Abereiddian/Early Llanvirn			467.3
		Dapingian							Arenig		Fennian			468.4 *
	Early Ordovician	Floian									Fennian			470
											Whitlandian			471.1 *
											Moridunian			474.3 *
		Tremadocian				Ordovician 1			Tremadoc		Migneintian			477.7
									Tremadoc		Cressagian			480.8 *
														485 *
Cambrian	Furongian	Stage 10				Cambrian 5								485.4
		Jiangshanian												489.5
		Paibian												494
	Miaolingian	Guzhangian			Series 3 †	Cambrian 4								497
		Drumian				Cambrian 4								500.5
		Wuliuan				Stage 5 †								Cambrian 3	504.5
	Series 2	Stage 4												Cambrian 3	509
	Series 2	Stage 3												Cambrian 2	514
	Terreneuvian	Stage 2												Cambrian 2	521
	Terreneuvian	Fortunian												Cambrian 1	529
																538.8