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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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			Ordovician of Britain				Cambrian of North America		North American Land Mammal Ages	Cretaceous Subepochs	Central Paratethys Stages
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												Pannonian	7.246
		Tortonian										Clarendonian		Pannonian	9.4
		Serravallian										Clarendonian		Sarmatian	11.63
												Barstovian		Sarmatian	12.5
														Badenian	12.8 *
		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											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		251.902
	Lopingian	Wuchiapingian		Longtanian †	254.14
	Guadalupian	Capitanian			259.51
		Wordian			264.28
		Roadian			266.9
	Cisuralian	Kungurian			273.01
		Artinskian			283.5
		Sakmarian			290.1
		Asselian			293.52
Carboniferous	Pennsylvanian	Gzhelian			298.9
		Kasimovian			303.7
		Moscovian			307
		Bashkirian			315.2
	Mississippian	Serpukhovian			323.2
		Visean			330.9
		Tournaisian			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			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			Fennian			470
					Whitlandian			471.1 *
					Moridunian			474.3 *
		Tremadocian	Tremadoc		Migneintian			477.7
			Tremadoc		Cressagian			480.8 *
								485 *
Cambrian	Furongian	Stage 10						Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
		Stage 10								Sunwaptan	487.5
		Jiangshanian								Sunwaptan	489.5
		Jiangshanian								Steptoean	493 *
		Paibian								Steptoean	494
	Miaolingian	Guzhangian						Series 3 †	Marjumian	Albertian †	Middle Cambrian	497
		Drumian							Marjumian			500.5
		Wuliuan		Stage 5 †					Topazan			504.5
		Wuliuan		Stage 5 †					Delamaran			506.5
	Series 2	Stage 4							Delamaran	Waucoban †	Early Cambrian	509
		Stage 4							Dyeran			511 *
		Stage 3							Dyeran			514
									Montezuman			514.8 *
									Begadean			519.9 *
	Terreneuvian	Stage 2										521
	Terreneuvian	Fortunian										529
															538.8