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
A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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			North American Land Mammal Ages	Permian of the Pamirs	Carboniferous Subepochs	Cambrian Epochs	Ordovician of North America
Quaternary	Holocene	Meghalayan				Saintaugustinean									0
		Meghalayan				Santarosean									0.0004
		Northgrippian													0.0042
		Greenlandian													0.0082
	Pleistocene	Late Pleistocene													0.0117
		Late Pleistocene				Rancholabrean									0.014
		Chibanian				Rancholabrean									0.129
		Chibanian				Irvingtonian									0.21
		Calabrian				Irvingtonian									0.774
		Calabrian				Blancan									1.4
		Gelasian													1.8
Neogene	Pliocene	Piacenzian	Tertiary †												2.58
		Zanclean													3.6
		Zanclean				Hemphillian									4.7
	Miocene	Messinian													5.333
		Tortonian													7.246
		Tortonian				Clarendonian									9.4
		Serravallian				Clarendonian									11.63
		Serravallian				Barstovian									12.5
		Langhian													13.82
		Burdigalian													15.98
						Hemingfordian									16.3
						Arikareean									18.5
		Aquitanian													20.44
Paleogene	Oligocene	Chattian													23.03
		Rupelian													27.82
						Whitneyan									29.5
						Orellan									31.8
	Eocene	Priabonian				Chadronian									33.9
		Priabonian				Duchesnean									37
		Bartonian				Duchesnean									37.71
		Bartonian				Uintan									39.7
		Lutetian				Uintan									41.2
		Lutetian				Bridgerian									46.2
		Ypresian				Bridgerian									47.8
						Wasatchian									50.5
						Clarkforkian									54.9
	Paleocene	Thanetian				Clarkforkian									56
		Thanetian				Tiffanian									56.2
		Selandian				Tiffanian									59.2
		Selandian				Torrejonian									60.9
		Danian				Torrejonian									61.6
		Danian				Puercan									63.8
Cretaceous	Late Cretaceous	Maastrichtian													66
		Campanian													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		Dorashamian	251.902
	Lopingian	Wuchiapingian		Longtanian †	Dzhulfian		254.14
	Guadalupian	Capitanian			Midian		259.51
		Wordian			Midian		264.28
		Wordian			Murgabian		266.2 *
		Roadian			Murgabian		266.9
	Cisuralian	Kungurian			Kubergandian		273.01
		Kungurian			Bolorian		279.8
		Artinskian			Bolorian		283.5
		Artinskian			Yakhtashian		286
		Sakmarian			Sakmarian		290.1
		Asselian			Asselian		293.52
Carboniferous	Pennsylvanian	Gzhelian					Late Pennsylvanian	Mapingian †	298.9
		Kasimovian						Mapingian †	303.7
		Kasimovian							305.9
		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								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