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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
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			Carboniferous of North America	Ordovician of China			Devonian of Germany	North American Land Mammal Ages
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		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			Bursumian †	293.52
Carboniferous	Pennsylvanian	Gzhelian			Virgilian	298.9
		Kasimovian			Missourian	303.7
		Kasimovian			Desmoinesian	305.9 *
		Moscovian			Desmoinesian	307
		Moscovian			Atokan	312.7 *
		Bashkirian			Atokan	315.2
		Bashkirian			Morrowan	318.4 *
	Mississippian	Serpukhovian			Chesterian	323.2
		Visean			Chesterian	330.9
					Meramecian	335.8 *
					Osagean	343.1 *
		Tournaisian			Osagean	346.7
		Tournaisian			Kinderhookian	351.9 *
Devonian	Late Devonian	Famennian				Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian				Adorf	372.2
	Middle Devonian	Givetian				Givetian	382.7
	Middle Devonian	Eifelian				Eifelian	387.7
	Early Devonian	Emsian				Emsian	393.3
		Pragian				Siegen	407.6
		Lochkovian				Gedinnine	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	Hirnantian				Xiaoxita †/Shikou	Wufeng †	443.8
		Katian	Chientangkiangian					Wufeng †	445.2
		Katian	Neichianshanian/Hanjiang						449.5
		Sandbian	Neichianshanian/Hanjiang						453
	Middle Ordovician	Darriwilian	Darriwilian				Guniu †/Hulo		458.4
		Darriwilian	Darriwilian				Hunjiang †	Dawan †/Daobaowan/Ningkuo	466.3 *
		Dapingian	Dapingian						467.3
	Early Ordovician	Floian	Yiyangian						470
		Tremadocian	Xinchangian						477.7
		Tremadocian	Xinchangian					Lianghekou †	477.9 *
Cambrian	Furongian	Stage 10							Late Cambrian	485.4
		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