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
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 Ages of Europe	Ordovician of Australia	Silurian of England		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	Gleedonian	427.4
			Wych						Woolhope	Gleedonian	428.4 *
										Whitwellian	429.7 *
		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	Bolindian									443.8
		Katian	Bolindian									445.2
			Eastonian									449 *
			Gisbornian									452 *
		Sandbian	Gisbornian									453
	Middle Ordovician	Darriwilian	Darriwilian									458.4
		Dapingian	Yapeenian									467.3
		Dapingian	Castlemainian									468.5 *
	Early Ordovician	Floian	Chewtonian									470
			Bendigonian									471.8 *
			Lancefieldian									473.5 *
		Tremadocian	Lancefieldian	477.7
		Tremadocian	Warendian	482.8 *
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 †					509		Delamaran
		Stage 4										Dyeran	511 *
		Stage 3										Dyeran	514
								Montezuman				514.8 *
								Begadean				519.9 *
	Terreneuvian	Stage 2				521
	Terreneuvian	Fortunian				529
																538.8