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
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Permian of the Russian Platform		Devonian of Czechoslovakia	Paleogene Mammal Ages of Asia		Cambrian Epochs	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							Tabenbulakian	Hsandagolian										23.03
	Oligocene	Rupelian							Kekeamuan	Hsandagolian										27.82
	Eocene	Priabonian							Houldjinian/Ergilian/Ulangochuian											33.9
		Bartonian							Sharamurunian/Irdinmanhan/Arshantan											37.71
		Lutetian																		41.2
		Ypresian								Bumbanian										47.8
	Paleocene	Thanetian							Gashatan											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
	Early Triassic	Induan																		251.2
Permian	Lopingian	Changhsingian																		251.902
		Wuchiapingian		Longtanian †																254.14
		Wuchiapingian		Longtanian †		Tatarian	Vyatkian													256.8 *
	Guadalupian	Capitanian					Severodvinian													259.51
		Wordian					Urzhumian													264.28
		Roadian				Kazanian	Povolzhian													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						Srbsko			382.7
	Middle Devonian	Eifelian						Chotec			387.7
	Early Devonian	Emsian						Daleje/Zlichovian			393.3
		Pragian						Pragian		407.6
		Lochkovian						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	Late Cambrian							Skullrockian								485.4
		Stage 10																487.5
		Jiangshanian		489.5
		Paibian		494
	Miaolingian	Guzhangian	Series 3 †	Middle Cambrian														497
		Drumian																500.5
		Wuliuan																Stage 5 †	504.5
	Series 2	Stage 4																Early Cambrian	509
	Series 2	Stage 3																	514
	Terreneuvian	Stage 2																	521
	Terreneuvian	Fortunian																	529
																				538.8