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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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			Permo-Triassic Subages of Eastern Europe	Permian of the Pamirs	Permian of China	Cenozoic Subepochs	Paleogene Mammal Ages of Asia		Silurian of North America
Quaternary	Pleistocene	Late Pleistocene							Late Pleistocene				0.0117
		Chibanian							Middle Pleistocene				0.129
		Calabrian							Early Pleistocene				0.774
		Gelasian							Early Pleistocene				1.8
Neogene	Pliocene	Piacenzian	Tertiary †						Late Pliocene				2.58
	Pliocene	Zanclean							Early Pliocene				3.6
	Miocene	Messinian							Late Miocene				5.333
		Tortonian							Late Miocene				7.246
		Serravallian							Middle Miocene				11.63
		Langhian							Middle Miocene				13.82
		Burdigalian							Early Miocene				15.98
		Aquitanian							Early Miocene				20.44
Paleogene	Oligocene	Chattian							Late Oligocene	Tabenbulakian	Hsandagolian		23.03
	Oligocene	Rupelian							Early Oligocene	Kekeamuan	Hsandagolian		27.82
	Eocene	Priabonian							Late Eocene	Houldjinian/Ergilian/Ulangochuian			33.9
		Bartonian							Middle Eocene	Sharamurunian/Irdinmanhan/Arshantan			37.71
		Lutetian							Middle Eocene				41.2
		Ypresian							Early Eocene		Bumbanian		47.8
	Paleocene	Thanetian							Late Paleocene	Gashatan			56
		Selandian							Middle Paleocene				59.2
		Danian							Early Paleocene				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				Vokhmian							247.2
	Early Triassic	Induan				Vokhmian							251.2
Permian	Lopingian	Changhsingian					Dorashamian	Meishanian					251.902
		Changhsingian					Dorashamian	Baoqingian					253.4 *
		Wuchiapingian		Longtanian †		Late Vyatkian/Early Vyatkian	Dzhulfian	Laoshanian					254.14
		Wuchiapingian		Longtanian †		Late Vyatkian/Early Vyatkian	Dzhulfian	Laibinian					257.7 *
	Guadalupian	Capitanian				Late Severodvinian/Early Severodvinian	Midian	Lengwuan					259.51
		Wordian				Late Urzhumian/Early Urzhumian	Midian	Kuhfengian					264.28
		Wordian				Late Urzhumian/Early Urzhumian	Murgabian						266.2 *
		Roadian				Late Kazanian/Early Kazanian	Murgabian						266.9
	Cisuralian	Kungurian					Kubergandian	Luodianian					273.01
		Kungurian					Bolorian						279.8
		Artinskian											283.5
								Longlinian					285.4 *
							Yakhtashian						286
		Sakmarian			Sakmarian		290.1
		Asselian			Asselian		Zisongian	293.52
Carboniferous	Pennsylvanian	Gzhelian					Zisongian	298.9
		Gzhelian						300.1
		Kasimovian						303.7
		Moscovian						307
		Bashkirian						315.2
	Mississippian	Serpukhovian						323.2
		Visean						330.9
		Tournaisian						346.7
Devonian	Late Devonian	Famennian						358.9
	Late Devonian	Frasnian						372.2
	Middle Devonian	Givetian						382.7
	Middle Devonian	Eifelian						387.7
	Early Devonian	Emsian						393.3
		Pragian						407.6
		Lochkovian						410.8
Silurian	Pridoli							Cayugan				419.2
	Pridoli							Niagaran			422.5 *
	Ludlow	Ludfordian								423
	Ludlow	Gorstian								425.6
	Wenlock	Homerian	Lockportian						427.4
	Wenlock	Sheinwoodian							430.5
	Llandovery	Telychian	Ontarian						433.4
		Aeronian							438.5
									Alexandrian	438.7 *
			Medinan					Clinton		440.1 *
										440.7 *
		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								485.4
		Jiangshanian								489.5
		Paibian								494
	Miaolingian	Guzhangian								Series 3 †	497
		Drumian									500.5
		Wuliuan		Stage 5 †							504.5
													509