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
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			North American Land Mammal Ages	Carboniferous of China	Permian of the Salt Range	Ordovician of Ibero-Bohemia				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
		Induan		251.2
		Induan		Kathwai	251.5 *
Permian	Lopingian	Changhsingian		Kathwai	251.902
					252.4 *
				Chhidru	252.9 *
		Wuchiapingian		Chhidru	Longtanian †		254.14
				Kalabagh			255 *
				Wargal			256 *
	Guadalupian	Capitanian					259.51
		Wordian					264.28
							265.3 *
				Amb			266.1 *
		Roadian		Amb			266.9
		Roadian					270.7 *
	Cisuralian	Kungurian					273.01
		Artinskian					283.5
		Sakmarian					290.1
		Asselian					293.52
Carboniferous	Pennsylvanian	Gzhelian					Mapingian †	298.9
		Gzhelian						Xiaodushanian	300 *
		Kasimovian						Xiaodushanian	303.7
								Dalaun	305.8 *
									305.9
		Moscovian							307
		Bashkirian							315.2
								Huashibanian	318.5 *
								Lousuan	321.2 *
	Mississippian	Serpukhovian						Dewunian	323.2
		Serpukhovian						Shangsian	330.8 *
		Visean						Shangsian	330.9
		Visean						Jiusian	335 *
		Tournaisian						Tangbagouan	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	Kosovian			Cincinnatian			Gamachian	443.8
		Katian	Kralodvorian						Gamachian	Bohdalec †	445.2
			Kralodvorian						Richmondian		446 *
			Berounian						Richmondian		449.7 *
									Maysvillian		Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
									Edenian			450.4 *
						Mohawkian			Chatfieldian			451.1 *
		Sandbian							Chatfieldian			453
									Turinian			453.7 *
									Turinian			Zahorany †/Vinice	Letna †	456.2 *
						Whiterockian					Canadian †	Zahorany †/Vinice		Chazyan †/Marmor	457 *
										Liben †					458 *
	Middle Ordovician	Darriwilian													458.4
			Dobrotivian												458.5 *
			Oretanian												459.7 *
										Sarka †					461.7 *
		Dapingian								Klabava †					467.3
			Arenigian												468
									Rangerian						469.1 *
	Early Ordovician	Floian				Ibexian			Blackhillsian					Jeffersonian †	Cassinian †	470
		Floian							Tulean							473.9 *
		Tremadocian	Tremadocian						Tulean							477.7
									Stairsian							480.3 *
									Skullrockian						Demingian †	482 *
Cambrian	Furongian	Stage 10							Skullrockian							485.4
		Stage 10							487.5
		Jiangshanian							489.5
		Paibian							494
	Miaolingian	Guzhangian							Series 3 †							497
		Drumian														500.5
		Wuliuan		Stage 5 †												504.5
																	509