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		Obsolete Carboniferous Ages of China	Devonian of Eastern North America	Permian of North America		Devonian of France	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					Capitanian													259.51
		Wordian					Wordian													264.28
		Roadian					Roadian													266.9
	Cisuralian	Kungurian					Leonardian	Cathedralian												273.01
		Kungurian						Hessian												281.9 *
		Artinskian						Hessian												283.5
		Artinskian					Wolfcampian	Lenoxian												286.1 *
		Sakmarian						Lenoxian												290.1
		Asselian						Nealian												293.52
Carboniferous	Pennsylvanian	Gzhelian			Mapingian †						Late Pennsylvanian									298.9
		Kasimovian			Mapingian †															303.7
		Kasimovian			305.9
		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			Conewangan/Conneautan/Canadaway	Famennian			Wocklum/Dasberg/Hemberg/Nehden		358.9
	Late Devonian	Frasnian			West Fallsian/Sonyean	Frasnian			Adorf		372.2
	Middle Devonian	Givetian			Geneseean/Taghanican/Tioughniogan	Cazenovian			Givetian		Givetian	382.7
	Middle Devonian	Eifelian			Southwoodian	Cazenovian			Couvinien		Eifelian	387.7
	Early Devonian	Emsian			Sawkillian/Deer Parkian	Helderbergian					Emsian	393.3
		Pragian									Siegen	407.6
		Pragian							Coblencien		Siegen	408.2 *
		Lochkovian							Gedinnine		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								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