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
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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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			Cretaceous North American Land-Mammal Ages	Ordovician of North America						Carboniferous Subepochs	Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
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									Senonian		66
		Campanian				Judithian/Aquilan											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 †										Zechstein			254.14
	Guadalupian	Capitanian												Rotliegendes			259.51
		Wordian															264.28
		Roadian															266.9
	Cisuralian	Kungurian															273.01
		Artinskian												Autunian			283.5
		Sakmarian															290.1
		Asselian															293.52
Carboniferous	Pennsylvanian	Gzhelian											Late Pennsylvanian				298.9
		Kasimovian											Late Pennsylvanian				303.7
		Moscovian											Middle Pennsylvanian				307
		Bashkirian											Early Pennsylvanian				315.2
	Mississippian	Serpukhovian											Late Mississippian				323.2
		Visean											Middle Mississippian				330.9
		Tournaisian											Early Mississippian				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			Cincinnatian		Gamachian	Ashgill	Hirnantian	443.8
		Katian					Gamachian		Rawtheyan	445.2
							Richmondian		Rawtheyan	446 *
			Cautleyan						448.9 *
			Pusgillian						449.3 *
			Caradoc			Streffordian		Onnian †	449.6 *
							Maysvillian		Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Edenian			450.4 *
					Mohawkian		Chatfieldian			451.1 *
						Cheneyan				451.5 *
						Burrellian				452.7 *
		Sandbian								453
								Actonian †		453.2 *
							Turinian	Actonian †		453.7 *
								Marshbrookian †		Woolstonian †	454.2 *
								Longvillian †			455.2 *
						Aurelucian					456.8 *
					Whiterockian				Canadian †		Chazyan †/Marmor	457 *
								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
			Arenig			Fennian						468.4 *
							Rangerian					469.1 *
	Early Ordovician	Floian			Ibexian		Blackhillsian				Jeffersonian †	Cassinian †			470
						Whitlandian	Blackhillsian								471.1 *
						Whitlandian	Tulean								473.9 *
						Moridunian									474.3 *
		Tremadocian	Tremadoc			Migneintian									477.7
						Migneintian	Stairsian								480.3 *
						Cressagian	Stairsian								480.8 *
						Cressagian	Skullrockian					Demingian †			482 *
												Demingian †			485 *
Cambrian	Furongian	Stage 10													485.4
		Stage 10													487.5
		Jiangshanian		489.5
		Paibian		494
	Miaolingian	Guzhangian		Series 3 †											497
		Drumian													500.5
		Wuliuan													Stage 5 †	504.5
																	509