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
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
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			Cambrian of North America		Devonian of Eastern North America		Cambrian of Kazakhstan	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																	Senonian		66
		Campanian																			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						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					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
								Blackhillsian	Whitlandian						471.1 *
								Tulean	Whitlandian						473.9 *
									Moridunian						474.3 *
		Tremadocian	Ungurian						Tremadoc						Migneintian	477.7
								Stairsian							Migneintian	480.3 *
								Stairsian							Cressagian	480.8 *
								Skullrockian						Demingian †	Cressagian	482 *
														Demingian †		485 *
Cambrian	Furongian	Stage 10	Franconian †/Dresbachian/Millardan								Batyrbaian								485.4
		Stage 10					Sunwaptan													487.5
		Jiangshanian		489.5
				Aksaian							490.7 *
				Sakian							492.2 *
							Steptoean				493 *
		Paibian					Steptoean				494
	Miaolingian	Guzhangian	Series 3 †	Marjumian			Albertian †				Ayusokkanian									497
		Guzhangian																		499.5
		Drumian									Zhanaarykian							500.5
		Drumian									Tuesaian							503
		Wuliuan		Stage 5 †							Tuesaian							Topazan		504.5
																		Topazan		505.3
																		Delamaran		506.5
	Series 2	Stage 4					Waucoban †													509
											Toyonian									510 *
											Toyonian						Dyeran	511 *
											Botomian							512.5 *
		Stage 3																514
																	Montezuman	514.8 *
											Atdabanian						Montezuman	515.6 *
					Begadean						Atdabanian						519.9 *
	Terreneuvian	Stage 2									Tommotian						521
		Stage 2									525.5
		Fortunian									529
																					538.8