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			Cambrian of Australia	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	Datsonian														485.4
			Payntonian														486.8 *
			Payntonian														487.5
		Jiangshanian	Iverian														489.5
		Paibian	Idamean														494
	Miaolingian	Guzhangian	Series 3 †						Mindyallan								497
		Guzhangian							Boomerangian								499
		Drumian							Undillan								500.5
		Drumian							Floran								503
		Wuliuan							Stage 5 †								Templetonian	504.5
		Wuliuan							Stage 5 †								Ordian	507.8 *
	Series 2	Stage 4															Ordian	509
																			510.8 *