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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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 the Russian Platform		Ordovician of Britain				Cretaceous North American Land-Mammal Ages	Carbo-Permian of the Russian Platform	Silurian of the Baltic	Ordovician of China
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										Lancian/Edmontonian				66
		Campanian										Judithian/Aquilan				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											Melekhovian			251.902
		Wuchiapingian		Longtanian †												254.14
		Wuchiapingian		Longtanian †		Tatarian	Vyatkian									256.8 *
	Guadalupian	Capitanian					Severodvinian									259.51
		Wordian					Urzhumian									264.28
		Wordian					Urzhumian						Noginskian			264.9 *
		Roadian				Kazanian	Povolzhian									266.9
		Roadian				Kazanian	Sokian									270.7 *
	Cisuralian	Kungurian				Kungurian	Irenian/Ufimian									273.01
							Filipovian									276.5 *
							Filipovian						Pavlovoposadian			276.8 *
							Saraninian									280.1 *
		Artinskian				Artinskian	Sarginian									283.5
							Irginian									285.9 *
							Irginian						Rusavkinian			287.6 *
							Burtsevian									287.8 *
		Sakmarian				Sakmarian	Sterlitamakian									290.1
		Sakmarian			Tastubian	Sakmarian	291.7 *
		Asselian			Asselian	Shikhanian	293.52
						Uskalykian	294.8
						Surenian	297.5
Carboniferous	Pennsylvanian	Gzhelian					298.9
		Kasimovian					Dorogomilovian	303.7
							Khamovnikian	304.8
							Krevyakinian	305.8 *
		Moscovian					Myachkovian	307
							Podolskian	308.9 *
							Kashirian	311.4 *
							Vereian	313.8
							Melekessian	314.8
		Bashkirian					Melekessian	315.2
							Cheremshanian	316.9 *
							Prikamian	318.6 *
							Severokeltmian	319.9 *
			Krasnopolyanian				321.2 *
			Voznesenian				321.9 *
	Mississippian	Serpukhovian	Zapaltjubian				323.2
			Protvian				324.4 *
			Steshevian				326.8 *
			Tarusian				329 *
		Visean	Venevian				330.9
			Mikhailovian				331.9 *
			Aleksinian				333.7 *
			Tulian				335.8 *
			Bobrikian				339.9 *
			Radaevkian				343.4 *
		Tournaisian	Kosvian				346.7
			Kizelian				350.7 *
			Cherepetian				351.9 *
			Karakubian				354.4 *
			Upinian				356.3 *
			Malevkian				357.6 *
			Gumerovian				358 *
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						Ohesaare	419.2
	Pridoli						Kaugetuma	421.7 *
	Ludlow	Ludfordian					Kuressaare	423
		Ludfordian					Paadla	423.4 *
		Gorstian					Paadla	425.6
	Wenlock	Homerian					Rootsikula	427.4
		Homerian					Jaagarahu	429.2 *
		Sheinwoodian		430.5			Jaagarahu
		Sheinwoodian		Jaani			431.8 *
	Llandovery	Telychian		Jaani			433.4
		Telychian		Adavere			434 *
		Aeronian		Adavere			438.5
		Aeronian		Raikkula			439.4 *
		Rhuddanian		Raikkula			440.8
		Rhuddanian		Juuru			441.4 *
Ordovician	Late Ordovician	Hirnantian		Ashgill			Hirnantian		Hirnantian	Xiaoxita †/Shikou	Wufeng †	443.8
		Katian					Rawtheyan		Chientangkiangian			445.2
							Cautleyan					448.9 *
							Pusgillian					449.3 *
							Pusgillian		Neichianshanian/Hanjiang			449.5
				Caradoc			Streffordian					Onnian †	449.6 *
							Cheneyan						451.5 *
							Burrellian						452.7 *
		Sandbian											453
												Actonian †	453.2 *
					Marshbrookian †	Woolstonian †						454.2 *
					Longvillian †							455.2 *
					Longvillian †		Aurelucian					456.8 *
					Soudleyan †/Harnagian/Costonian		Aurelucian					457.4 *
	Middle Ordovician	Darriwilian		Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				Darriwilian	Guniu †/Hulo		458.4
					Abereiddian/Early Llanvirn					Guniu †/Hulo		461.3 *
										Hunjiang †	Dawan †/Daobaowan/Ningkuo	466.3 *
		Dapingian							Dapingian			467.3
		Dapingian		Arenig	Fennian				Dapingian			468.4 *
	Early Ordovician	Floian			Fennian				Yiyangian			470
					Whitlandian							471.1 *
					Moridunian							474.3 *
		Tremadocian		Tremadoc	Migneintian				Xinchangian			477.7
					Migneintian						Lianghekou †	477.9 *
					Cressagian							480.8 *
												485 *
Cambrian	Furongian	Stage 10										Datsonian	485.4
		Stage 10										Payntonian	486.8 *
		Jiangshanian										Iverian	489.5
		Paibian										Idamean	494
	Miaolingian	Guzhangian										Series 3 †	Mindyallan	497
		Guzhangian											Boomerangian	499
		Drumian											Undillan	500.5
		Drumian											Floran	503
		Wuliuan											Stage 5 †	Templetonian	504.5
		Wuliuan											Stage 5 †	Ordian	507.8 *
	Series 2	Stage 4												Ordian	509
																510.8 *