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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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			Devonian of Germany	Carboniferous of North America	Permian Subages of Germany	Permian of the Russian Platform		Ordovician of China			Devonian of Czechoslovakia	Mammal Paleogene Zones
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													MP 30/MP 29/MP 28/MP 27/MP 26	MP 25	23.03
	Oligocene	Rupelian													MP 24/MP 23/MP 22/MP 21	MP 25	27.82
	Eocene	Priabonian													MP 20/MP 19/MP 18/MP 17B/MP 17A		33.9
		Bartonian													MP 16		37.71
		Lutetian													MP 15/MP 14/MP 13/MP 12/MP 11		41.2
		Ypresian													MP 10/MP 8 + 9/MP 7		47.8
	Paleocene	Thanetian													MP 6	MP 1 - 5	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															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															247.2
	Early Triassic	Induan															251.2
Permian	Lopingian	Changhsingian						Buntsandstein									251.902
		Wuchiapingian		Longtanian †													254.14
		Wuchiapingian		Longtanian †					Tatarian	Vyatkian							256.8 *
	Guadalupian	Capitanian						Ohre/Aller		Severodvinian							259.51
		Wordian						Leine		Urzhumian							264.28
		Roadian							Kazanian	Povolzhian							266.9
		Roadian							Kazanian	Sokian							270.7 *
	Cisuralian	Kungurian							Kungurian	Irenian/Ufimian							273.01
										Filipovian							276.5 *
										Saraninian							280.1 *
		Artinskian							Artinskian	Sarginian							283.5
										Irginian							285.9 *
										Burtsevian							287.8 *
		Sakmarian							Sakmarian	Sterlitamakian							290.1
		Sakmarian							Sakmarian	Tastubian							291.7 *
		Asselian					Bursumian †		Asselian	Shikhanian							293.52
										Uskalykian							294.8
					Surenian	297.5
Carboniferous	Pennsylvanian	Gzhelian			Virgilian				298.9
		Kasimovian			Missourian				303.7
		Kasimovian			Desmoinesian				305.9 *
		Moscovian			Desmoinesian				307
		Moscovian			Atokan				312.7 *
		Bashkirian			Atokan				315.2
		Bashkirian			Morrowan				318.4 *
	Mississippian	Serpukhovian			Chesterian				323.2
		Visean			Chesterian				330.9
					Meramecian				335.8 *
					Osagean				343.1 *
		Tournaisian			Osagean				346.7
		Tournaisian			Kinderhookian				351.9 *
Devonian	Late Devonian	Famennian			Wocklum/Dasberg/Hemberg/Nehden					358.9
	Late Devonian	Frasnian			Adorf					372.2
	Middle Devonian	Givetian			Givetian					Srbsko	382.7
	Middle Devonian	Eifelian	Eifelian		Chotec					387.7
	Early Devonian	Emsian	Emsian		Daleje/Zlichovian					393.3
		Pragian	Siegen		Pragian					407.6
		Lochkovian	Gedinnine		Lochkovian					410.8
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								Hirnantian	Xiaoxita †/Shikou	Wufeng †	443.8
		Katian								Chientangkiangian		Wufeng †	445.2
		Katian								Neichianshanian/Hanjiang			449.5
		Sandbian								Neichianshanian/Hanjiang			453
	Middle Ordovician	Darriwilian								Darriwilian	Guniu †/Hulo		458.4
		Darriwilian								Darriwilian	Hunjiang †	Dawan †/Daobaowan/Ningkuo	466.3 *
		Dapingian								Dapingian			467.3
	Early Ordovician	Floian								Yiyangian			470
		Tremadocian								Xinchangian			477.7
		Tremadocian								Xinchangian		Lianghekou †	477.9 *
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