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
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

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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Permian of the Russian Platform		Permian of the Salt Range	Ordovician of Ibero-Bohemia				Ordovician of North America
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																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
		Induan																251.2
		Induan						Kathwai										251.5 *
Permian	Lopingian	Changhsingian						Kathwai										251.902
																		252.4 *
								Chhidru										252.9 *
		Wuchiapingian		Longtanian †				Chhidru										254.14
								Kalabagh										255 *
								Wargal										256 *
						Tatarian	Vyatkian											256.8 *
	Guadalupian	Capitanian					Severodvinian											259.51
		Wordian					Urzhumian											264.28
																		265.3 *
								Amb										266.1 *
		Roadian				Kazanian	Povolzhian	Amb										266.9
		Roadian				Kazanian	Sokian											270.7 *
	Cisuralian	Kungurian				Kungurian	Irenian/Ufimian											273.01
							Filipovian											276.5 *
							Saraninian											280.1 *
		Artinskian			Artinskian	Sarginian	283.5
						Irginian	285.9 *
						Burtsevian	287.8 *
		Sakmarian			Sakmarian	Sterlitamakian	290.1
		Sakmarian			Sakmarian	Tastubian	291.7 *
		Asselian			Asselian	Shikhanian	293.52
						Uskalykian	294.8
						Surenian	297.5
Carboniferous	Pennsylvanian	Gzhelian					Mapingian †		298.9
		Kasimovian					Mapingian †		303.7
		Kasimovian							305.9
		Moscovian							307
		Bashkirian							315.2
	Mississippian	Serpukhovian							323.2
		Visean							330.9
		Tournaisian							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	Kosovian						Cincinnatian	Gamachian	443.8
		Katian	Kralodvorian							Gamachian	Bohdalec †	445.2
			Kralodvorian							Richmondian		446 *
			Berounian							Richmondian		449.7 *
										Maysvillian		Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
										Edenian			450.4 *
									Mohawkian	Chatfieldian			451.1 *
		Sandbian								Chatfieldian			453
										Turinian			453.7 *
										Turinian			Zahorany †/Vinice	Letna †	456.2 *
									Whiterockian			Canadian †	Zahorany †/Vinice		Chazyan †/Marmor	457 *
											Liben †					458 *
	Middle Ordovician	Darriwilian														458.4
			Dobrotivian													458.5 *
			Oretanian													459.7 *
											Sarka †					461.7 *
		Dapingian									Klabava †					467.3
			Arenigian													468
										Rangerian						469.1 *
	Early Ordovician	Floian							Ibexian	Blackhillsian					Jeffersonian †	Cassinian †	470
		Floian								Tulean							473.9 *
		Tremadocian	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