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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Permian of China	Cretaceous North American Land-Mammal Ages	Devonian of Eastern North America		Ordovician of the Baltic
Neogene	Pliocene	Piacenzian	Tertiary †										2.58
	Pliocene	Zanclean											3.6
	Miocene	Messinian											5.333
		Tortonian											7.246
		Serravallian											11.63
		Langhian											13.82
		Burdigalian											15.98
		Aquitanian											20.44
Paleogene	Oligocene	Chattian											23.03
	Oligocene	Rupelian											27.82
	Eocene	Priabonian											33.9
		Bartonian											37.71
		Lutetian											41.2
		Ypresian											47.8
	Paleocene	Thanetian											56
		Selandian											59.2
		Danian											61.6
Cretaceous	Late Cretaceous	Maastrichtian					Lancian/Edmontonian						66
		Campanian					Judithian/Aquilan						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				Meishanian							251.902
		Changhsingian				Baoqingian							253.4 *
		Wuchiapingian		Longtanian †		Laoshanian							254.14
		Wuchiapingian		Longtanian †		Laibinian							257.7 *
	Guadalupian	Capitanian				Lengwuan							259.51
		Wordian				Kuhfengian							264.28
		Roadian				Kuhfengian							266.9
	Cisuralian	Kungurian				Luodianian							273.01
		Artinskian				Luodianian							283.5
		Artinskian				Longlinian							285.4 *
		Sakmarian				Longlinian							290.1
		Asselian				Zisongian							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			Conewangan/Conneautan/Canadaway			358.9
	Late Devonian	Frasnian			West Fallsian/Sonyean			372.2
	Middle Devonian	Givetian			Geneseean/Taghanican/Tioughniogan			Cazenovian	382.7
	Middle Devonian	Eifelian			Southwoodian			Cazenovian	387.7
	Early Devonian	Emsian			Sawkillian/Deer Parkian			Helderbergian	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	Harju						Porkuni	443.8
		Katian					Pirgu		445.2
							Vormsi		449.6 *
							Nabala		Johvi †	450 *
			Viru				Rakvere			450.6 *
							Oandu			452 *
		Sandbian					Keila		Idavere †	453
							Haljala			453.9
							Kukruse			456.4 *
							Uhaku		Aluoja †	457.5 *
	Middle Ordovician	Darriwilian					Uhaku			458.4
							Lasnamagi			458.9 *
							Aseri			460.4 *
			Oeland				Kunda			462.9 *
							Kunda		Valaste †/Hunderum	464.3 *
							Volkhov			Langevoja †/Vaana/Saka	467.1 *
		Dapingian					Volkhov				467.3
		Dapingian					Billingen				469.3 *
	Early Ordovician	Floian									470
									Latorp †		470.1 *
							Hunneberg				473.7 *
		Tremadocian					Hunneberg				477.7
							Varangu				481.3 *
							Pakerort				482.2 *
Cambrian	Furongian	Stage 10					Pakerort				485.4
											486.3 *
											486.5
		Jiangshanian									489.5
		Paibian									494
	Miaolingian	Guzhangian									Series 3 †	497
		Drumian										500.5
		Wuliuan		Stage 5 †								504.5
													509