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			Cambrian of Kazakhstan	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				Ungurian	477.7
					Stairsian					480.3 *
					Skullrockian			Demingian †		482 *
Cambrian	Furongian	Stage 10			Skullrockian	Batyrbaian				Late Cambrian	485.4
		Stage 10									487.5
		Jiangshanian									489.5
						Aksaian					490.7 *
						Sakian					492.2 *
		Paibian				Sakian					494
	Miaolingian	Guzhangian				Series 3 †				Ayusokkanian	Middle Cambrian	497
		Guzhangian										499.5
		Drumian								Zhanaarykian		500.5
		Drumian								Tuesaian		503
		Wuliuan								Tuesaian		Stage 5 †	504.5
		Wuliuan										Stage 5 †	505.3
	Series 2	Stage 4										Early Cambrian	509
										Toyonian			510 *
										Botomian			512.5 *
		Stage 3								Botomian			514
		Stage 3								Atdabanian			515.6 *
	Terreneuvian	Stage 2								Tommotian			521
		Stage 2											525.5
		Fortunian											529
																538.8