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
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
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			Devonian Subages	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						Late Famennian		358.9
								Middle Famennian		365.3 *
								Early Famennian		368.5 *
		Frasnian	Late Frasnian				372.2
			Middle Frasnian				375.4 *
			Early Frasnian				379.3 *
	Middle Devonian	Givetian	Late Givetian				382.7
			Middle Givetian				383.7 *
			Early Givetian				385.9 *
		Eifelian	Late Eifelian				387.7
		Eifelian	Early Eifelian				390.3 *
	Early Devonian	Emsian	Late Emsian				393.3
		Emsian	Early Emsian				398.3 *
		Pragian	Pragian				407.6
		Lochkovian	Late Lochkovian				410.8
			Middle Lochkovian				412.8 *
			Early Lochkovian				415.6 *
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		Tulean	Tremadocian					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