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

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 China		Silurian of the Baltic	Permian of the Russian Platform		Devonian of Germany	Permian of North America		Devonian of France
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
	Early Triassic	Induan													251.2
Permian	Lopingian	Changhsingian													251.902
		Wuchiapingian		Longtanian †											254.14
		Wuchiapingian		Longtanian †					Tatarian	Vyatkian					256.8 *
	Guadalupian	Capitanian								Severodvinian		Capitanian			259.51
		Wordian								Urzhumian		Wordian			264.28
		Roadian							Kazanian	Povolzhian		Roadian			266.9
		Roadian							Kazanian	Sokian		Roadian			270.7 *
	Cisuralian	Kungurian							Kungurian	Irenian/Ufimian		Leonardian	Cathedralian		273.01
										Filipovian					276.5 *
										Saraninian					280.1 *
										Saraninian			Hessian		281.9 *
		Artinskian							Artinskian	Sarginian					283.5
										Irginian					285.9 *
										Irginian		Wolfcampian	Lenoxian		286.1 *
										Burtsevian					287.8 *
		Sakmarian							Sakmarian	Sterlitamakian					290.1
		Sakmarian							Sakmarian	Tastubian					291.7 *
		Asselian			Asselian	Shikhanian	Nealian	293.52
						Uskalykian		294.8
						Surenian		297.5
Carboniferous	Pennsylvanian	Gzhelian							298.9
		Kasimovian							303.7
		Moscovian							307
		Bashkirian							315.2
	Mississippian	Serpukhovian							323.2
		Visean							330.9
		Tournaisian							346.7
Devonian	Late Devonian	Famennian							Wocklum/Dasberg/Hemberg/Nehden	Famennian	358.9
	Late Devonian	Frasnian							Adorf	Frasnian	372.2
	Middle Devonian	Givetian							Givetian	Givetian	382.7
	Middle Devonian	Eifelian							Eifelian	Couvinien	387.7
	Early Devonian	Emsian							Emsian		393.3
		Pragian							Siegen		407.6
		Pragian							Siegen	Coblencien	408.2 *
		Lochkovian	Gedinnine						Gedinnine	410.8
Silurian	Pridoli		Ohesaare								419.2
	Pridoli		Kaugetuma								421.7 *
	Ludlow	Ludfordian	Kuressaare								423
		Ludfordian	Paadla								423.4 *
		Gorstian	Paadla								425.6
	Wenlock	Homerian	Rootsikula								427.4
		Homerian	Jaagarahu								429.2 *
		Sheinwoodian	Jaagarahu								430.5
		Sheinwoodian	Jaani								431.8 *
	Llandovery	Telychian	Jaani								433.4
		Telychian	Adavere								434 *
		Aeronian	Adavere								438.5
		Aeronian	Raikkula								439.4 *
		Rhuddanian	Raikkula								440.8
		Rhuddanian	Juuru								441.4 *
Ordovician	Late Ordovician	Hirnantian									443.8
		Katian									445.2
		Sandbian									453
	Middle Ordovician	Darriwilian									458.4
	Middle Ordovician	Dapingian									467.3
	Early Ordovician	Floian									470
	Early Ordovician	Tremadocian									477.7
Cambrian	Furongian	Stage 10									Niuchehean	Taoyuanian †	485.4
		Jiangshanian									Jiangshanian		489.5
		Paibian									Paibian		494
		Paibian									Paibian	Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian									Series 3 †	Guzhangian	Wangcunian †	497
		Drumian										Drumian	Wangcunian †	500.5
		Wuliuan		Stage 5 †								Wuliuan/Taijangian		504.5
	Series 2	Stage 4										Duyunian		509
	Series 2	Stage 3										Nangaoian		514
	Terreneuvian	Stage 2										Meishucunian		521
		Fortunian										Meishucunian		529
		Fortunian										Jinnigian		530.7
															538.8