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
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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
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			Cretaceous Subepochs	Paleogene Mammal Ages of Asia		Permian of the Pamirs	Permian-Jurassic of New Zealand
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					Tabenbulakian	Hsandagolian				23.03
	Oligocene	Rupelian					Kekeamuan	Hsandagolian				27.82
	Eocene	Priabonian					Houldjinian/Ergilian/Ulangochuian					33.9
		Bartonian					Sharamurunian/Irdinmanhan/Arshantan					37.71
		Lutetian										41.2
		Ypresian						Bumbanian				47.8
	Paleocene	Thanetian					Gashatan					56
		Selandian										59.2
		Danian										61.6
Cretaceous	Late Cretaceous	Maastrichtian				Senonian						66
		Campanian										72.1
		Santonian										83.6
		Coniacian										86.3
		Turonian										89.8
		Cenomanian										93.9
	Early Cretaceous	Albian				Gallic						100.5
		Aptian										113
		Barremian										121.4
		Hauterivian				Neocomian						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									298.9
		Kasimovian						303.7
		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