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. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

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			Silurian of the Baltic	Permo-Triassic Subages of Eastern Europe	Ordovician of Britain				North American Land Mammal Ages	Permian of China	Devonian Subages
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		Vokhmian	247.2
	Early Triassic	Induan		Vokhmian	251.2
Permian	Lopingian	Changhsingian			Meishanian	251.902
		Changhsingian			Baoqingian	253.4 *
		Wuchiapingian		Longtanian †	Late Vyatkian/Early Vyatkian	Laoshanian	254.14
		Wuchiapingian		Longtanian †	Late Vyatkian/Early Vyatkian	Laibinian	257.7 *
	Guadalupian	Capitanian			Late Severodvinian/Early Severodvinian	Lengwuan	Capitanian	259.51
		Wordian			Late Urzhumian/Early Urzhumian	Kuhfengian	Wordian	264.28
		Roadian			Late Kazanian/Early Kazanian	Kuhfengian	Roadian	266.9
	Cisuralian	Kungurian				Luodianian	Leonardian	Cathedralian	273.01
		Kungurian						Hessian	281.9 *
		Artinskian							283.5
						Longlinian			285.4 *
							Wolfcampian	Lenoxian	286.1 *
		Sakmarian						Lenoxian	290.1
		Asselian				Zisongian		Nealian	293.52
Carboniferous	Pennsylvanian	Gzhelian				Zisongian			298.9
		Gzhelian							300.1
		Kasimovian							303.7
		Moscovian							307
		Bashkirian							315.2
	Mississippian	Serpukhovian							323.2
		Visean							330.9
		Tournaisian							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		Ohesaare							419.2
	Pridoli		Kaugetuma							421.7 *
	Ludlow	Ludfordian	Kuressaare							423
		Ludfordian	Paadla							423.4 *
		Gorstian	Paadla							425.6
	Wenlock	Homerian	Rootsikula							427.4
		Homerian	Jaagarahu							429.2 *
		Sheinwoodian	Jaagarahu							430.5
		Sheinwoodian	Jaani							431.8 *
	Llandovery	Telychian	Jaani							433.4
		Telychian	Adavere							434 *
		Aeronian	Adavere							438.5
		Aeronian	Raikkula							439.4 *
		Rhuddanian	Raikkula							440.8
		Rhuddanian	Juuru							441.4 *
Ordovician	Late Ordovician	Hirnantian								Ashgill	Hirnantian	443.8
		Katian									Rawtheyan	445.2
											Cautleyan	448.9 *
											Pusgillian	449.3 *
										Caradoc	Streffordian	Onnian †	449.6 *
											Cheneyan		451.5 *
											Burrellian		452.7 *
		Sandbian											453
												Actonian †	453.2 *
												Marshbrookian †	Woolstonian †	454.2 *
												Longvillian †		455.2 *
											Aurelucian	Longvillian †		456.8 *
											Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian								Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian		Abereiddian/Early Llanvirn							461.3 *
		Dapingian		Abereiddian/Early Llanvirn							467.3
		Dapingian		Arenig						Fennian	468.4 *
	Early Ordovician	Floian			470					Fennian
					Whitlandian					471.1 *
					Moridunian					474.3 *
		Tremadocian		Tremadoc	Migneintian					477.7
				Tremadoc	Cressagian					480.8 *
										485 *
Cambrian	Furongian	Stage 10								485.4
		Jiangshanian					489.5
		Paibian				494
	Miaolingian	Guzhangian				Series 3 †	497
		Drumian					500.5
		Wuliuan					Stage 5 †	504.5
	Series 2	Stage 4						509
	Series 2	Stage 3						514
	Terreneuvian	Stage 2						521
	Terreneuvian	Fortunian						529
															538.8