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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			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								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							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								Delamaran	Waucoban †	509
		Stage 4								Dyeran		511 *
		Stage 3								Dyeran		514
										Montezuman		514.8 *
										Begadean		519.9 *
	Terreneuvian	Stage 2										521
	Terreneuvian	Fortunian										529
													538.8