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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) 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			Silurian of England		Obsolete Carboniferous Ages of China	Devonian Subages	Permian of the Pamirs	Permian-Jurassic of New Zealand		Cambrian 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									Oteke	Puaroan			145
		Kimmeridgian									Oteke	Puaroan			149.2
											Kawhia	Ohauan			150
												Heterian			154.5
		Oxfordian													154.8
	Middle Jurassic	Callovian													161.5
		Callovian										Temaikan			164.3
		Bathonian													165.3
		Bajocian													168.2
		Aalenian													170.9
	Early Jurassic	Toarcian													174.7
		Toarcian									Herangi	Ururoan			176
		Pliensbachian										Ururoan			184.2
		Pliensbachian										Aratauran			188.9
		Sinemurian													192.9
		Hettangian													199.5
Triassic	Late Triassic	Rhaetian									Balfour	Otapirian			201.4
		Norian										Warepan			208.5
												Otamitan			217
												Oretian			221
		Carnian										Oretian			227
		Carnian									Gore	Kaihikuan			227.5
	Middle Triassic	Ladinian										Kaihikuan			237
		Ladinian										Etalian			238
		Anisian										Etalian			242
		Anisian										Malakovian			246
	Early Triassic	Olenekian										Malakovian			247.2
		Olenekian										Nelsonian			249
		Induan										Nelsonian			251.2
		Induan									DUrville	Makarewan			251.5
Permian	Lopingian	Changhsingian								Dorashamian		Makarewan			251.902
		Changhsingian								Dorashamian		Waiitian			253.2
		Wuchiapingian		Longtanian †						Dzhulfian		Waiitian			254.14
		Wuchiapingian		Longtanian †						Dzhulfian		Puruhauan			254.2
	Guadalupian	Capitanian								Midian	Aparima	Flettian			259.51
		Wordian			264.28							Flettian
					Barettian	266
						Murgabian	266.2 *
		Roadian				Murgabian	266.9
	Cisuralian	Kungurian				Kubergandian	273.01
					Mangapirian	Kubergandian	276
						Bolorian	279.8
		Artinskian					283.5
					Telfordian		285
					Telfordian	Yakhtashian	286
						Yakhtashian		288.5
		Sakmarian				Sakmarian		290.1
		Asselian				Asselian		293.52
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	Late Famennian						358.9
			Middle Famennian						365.3 *
			Early Famennian						368.5 *
		Frasnian	Late Frasnian						372.2
			Middle Frasnian						375.4 *
			Early Frasnian						379.3 *
	Middle Devonian	Givetian	Late Givetian						382.7
			Middle Givetian						383.7 *
			Early Givetian						385.9 *
		Eifelian	Late Eifelian						387.7
		Eifelian	Early Eifelian						390.3 *
	Early Devonian	Emsian	Late Emsian						393.3
		Emsian	Early Emsian						398.3 *
		Pragian	Pragian						407.6
		Lochkovian	Late Lochkovian						410.8
			Middle Lochkovian						412.8 *
			Early Lochkovian						415.6 *
Silurian	Pridoli		Red Downtonian/Temeside Shales/Downton Castle						Whitcliffe/Leintwardine		419.2
	Pridoli		Red Downtonian/Temeside Shales/Downton Castle						Bringewood/Elton		421.3
	Ludlow	Ludfordian	Coalbrookdale						Wenlock (England)/Tickwood		423
		Gorstian									425.6
		Gorstian							Buildwas		426.4 *
	Wenlock	Homerian							Buildwas		427.4
		Homerian	Wych						Woolhope		428.4 *
		Sheinwoodian									430.5
	Llandovery	Telychian									433.4
		Telychian									436.3 *
		Aeronian									438.5
		Aeronian	Cowleigh Park								439.3 *
		Rhuddanian	Cowleigh Park								440.8
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									Franconian †/Dresbachian/Millardan	485.4
		Stage 10										Sunwaptan	487.5
		Jiangshanian										Sunwaptan	489.5
		Jiangshanian										Steptoean	493 *
		Paibian										Steptoean	494
	Miaolingian	Guzhangian		Series 3 †							Marjumian	Albertian †	497
		Drumian									Marjumian		500.5
		Wuliuan									Stage 5 †		Topazan	504.5
		Wuliuan									Stage 5 †		Delamaran	506.5
	Series 2	Stage 4										Waucoban †	Delamaran	509
		Stage 4											Dyeran	511 *
		Stage 3											Dyeran	514
													Montezuman	514.8 *
													Begadean	519.9 *
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
															538.8