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
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 Siberia			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 *
													Demingian †	Mansian †	483.55 *
Cambrian	Furongian	Stage 10									Batyrbaian	Tavgian †	Ketyan †/Yurakian			485.4
		Stage 10														487.5
		Jiangshanian														489.5
											Aksaian					490.7 *
											Sakian					492.2 *
		Paibian														494
		Paibian											Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian									Series 3 †	Ayusokkanian					497
		Guzhangian										Mayan/Menevian					499.5
		Drumian										Mayan/Menevian					500.5
		Wuliuan		Stage 5 †								Amgan/Solvan					504.5
	Series 2	Stage 4										Amgan/Solvan					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