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
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

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 Britain		Cenozoic Subepochs	Carboniferous Subepochs	Devonian of Germany	Ordovician of North America					Silurian of North America
Quaternary	Pleistocene	Late Pleistocene						Late Pleistocene									0.0117
		Chibanian						Middle Pleistocene									0.129
		Calabrian						Early Pleistocene									0.774
		Gelasian						Early Pleistocene									1.8
Neogene	Pliocene	Piacenzian	Tertiary †					Late Pliocene									2.58
	Pliocene	Zanclean						Early Pliocene									3.6
	Miocene	Messinian						Late Miocene									5.333
		Tortonian						Late Miocene									7.246
		Serravallian						Middle Miocene									11.63
		Langhian						Middle Miocene									13.82
		Burdigalian						Early Miocene									15.98
		Aquitanian						Early Miocene									20.44
Paleogene	Oligocene	Chattian						Late Oligocene									23.03
	Oligocene	Rupelian						Early Oligocene									27.82
	Eocene	Priabonian						Late Eocene									33.9
		Bartonian						Middle Eocene									37.71
		Lutetian						Middle Eocene									41.2
		Ypresian						Early Eocene									47.8
	Paleocene	Thanetian						Late Paleocene									56
		Selandian						Middle Paleocene									59.2
		Danian						Early Paleocene									61.6
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							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				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						Cayugan		419.2
	Pridoli						Niagaran		422.5 *
	Ludlow	Ludfordian							423
	Ludlow	Gorstian							425.6
	Wenlock	Homerian							Lockportian	427.4
	Wenlock	Sheinwoodian								430.5
	Llandovery	Telychian							Ontarian	433.4
		Aeronian								438.5
										Alexandrian	438.7 *
							Medinan		Clinton		440.1 *
											440.7 *
		Rhuddanian	440.8
Ordovician	Late Ordovician	Hirnantian	Cincinnatian				Gamachian				443.8
		Katian					Gamachian				445.2
							Richmondian				446 *
							Maysvillian				Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Edenian					450.4 *
			Mohawkian				Chatfieldian					451.1 *
		Sandbian					Chatfieldian					453
							Turinian					453.7 *
			Whiterockian								Canadian †	Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian											458.4
		Dapingian											467.3
		Dapingian					Rangerian						469.1 *
	Early Ordovician	Floian	Ibexian				Blackhillsian					Jeffersonian †	Cassinian †	470
		Floian					Tulean							473.9 *
		Tremadocian					Tulean							477.7
							Stairsian							480.3 *
							Skullrockian						Demingian †	482 *
Cambrian	Furongian	Stage 10					Skullrockian				Merioneth	Dolgellian/Trempealeauan			485.4
												Dolgellian/Trempealeauan			487.5
												Festiniogian			489.2 *
		Jiangshanian										Festiniogian			489.5
		Jiangshanian										Maentwrogian			493.1 *
		Paibian										Maentwrogian			494
	Miaolingian	Guzhangian									Series 3 †	St Davids				497
		Drumian														500.5
		Wuliuan		Stage 5 †												504.5
	Series 2	Stage 4										Caerfai				509
	Series 2	Stage 3														514
	Terreneuvian	Stage 2														521
	Terreneuvian	Fortunian														529
																	538.8