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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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

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			Cambrian of Siberia			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			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			443.8
		Katian			445.2
		Sandbian			453
	Middle Ordovician	Darriwilian	458.4
	Middle Ordovician	Dapingian	467.3
	Early Ordovician	Floian	470
		Tremadocian	477.7
		Tremadocian	Mansian †		483.55 *
Cambrian	Furongian	Stage 10	Batyrbaian		Tavgian †	Ketyan †/Yurakian	Late Cambrian	485.4
		Jiangshanian	Batyrbaian					489.5
			Aksaian					490.7 *
			Sakian					492.2 *
		Paibian						494
		Paibian				Ensyan †/Maduan/Nganasanian		494.7 *
	Miaolingian	Guzhangian	Series 3 †		Ayusokkanian			Middle Cambrian	497
		Guzhangian			Mayan/Menevian				499.5
		Drumian			Mayan/Menevian				500.5
		Wuliuan		Stage 5 †	Amgan/Solvan				504.5
	Series 2	Stage 4			Amgan/Solvan			Early Cambrian	509
					Toyonian	Lenian †			510 *
					Botomian				512.5 *
		Stage 3			Botomian				514
		Stage 3			Atdabanian				515.6 *
	Terreneuvian	Stage 2			Tommotian				521
		Stage 2			Nemakit-Daldynian				525.5
		Fortunian			Nemakit-Daldynian	Manykaian †			529
										538.8