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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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			Carbo-Permian of the Russian Platform	Ordovician of North America						Cretaceous Subepochs	Cenozoic Subepochs
Quaternary	Pleistocene	Late Pleistocene												Late Pleistocene	0.0117
		Chibanian												Middle Pleistocene	0.129
		Calabrian												Early Pleistocene	0.774
		Gelasian												Early Pleistocene	1.8
Neogene	Pliocene	Piacenzian	Tertiary †											Late Pliocene	2.58
	Pliocene	Zanclean												Early Pliocene	3.6
	Miocene	Messinian												Late Miocene	5.333
		Tortonian												Late Miocene	7.246
		Serravallian												Middle Miocene	11.63
		Langhian												Middle Miocene	13.82
		Burdigalian												Early Miocene	15.98
		Aquitanian												Early Miocene	20.44
Paleogene	Oligocene	Chattian												Late Oligocene	23.03
	Oligocene	Rupelian												Early Oligocene	27.82
	Eocene	Priabonian												Late Eocene	33.9
		Bartonian												Middle Eocene	37.71
		Lutetian												Middle Eocene	41.2
		Ypresian												Early Eocene	47.8
	Paleocene	Thanetian												Late Paleocene	56
		Selandian												Middle Paleocene	59.2
		Danian												Early Paleocene	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				Melekhovian									251.902
	Lopingian	Wuchiapingian		Longtanian †											254.14
	Guadalupian	Capitanian													259.51
		Wordian													264.28
		Wordian				Noginskian									264.9 *
		Roadian													266.9
	Cisuralian	Kungurian													273.01
		Kungurian				Pavlovoposadian									276.8 *
		Artinskian				Pavlovoposadian									283.5
		Artinskian				Rusavkinian									287.6 *
		Sakmarian													290.1
		Asselian													293.52
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				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			Cincinnatian	Gamachian	443.8
		Katian				Gamachian	445.2
						Richmondian	446 *
						Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
						Edenian		450.4 *
					Mohawkian	Chatfieldian		451.1 *
		Sandbian				Chatfieldian		453
				Turinian		453.7 *
				Whiterockian		Canadian †	Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian						458.4
		Dapingian						467.3
		Dapingian			Rangerian			469.1 *
	Early Ordovician	Floian		Ibexian	Blackhillsian		Jeffersonian †	Cassinian †	470
		Floian			Tulean				473.9 *
		Tremadocian			Tulean				477.7
					Stairsian				480.3 *
					Skullrockian			Demingian †	482 *
Cambrian	Furongian	Stage 10			Skullrockian				Late Cambrian	485.4
		Stage 10								487.5
		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