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. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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			Permian of Western Europe	Cambrian of China		Ordovician of Ibero-Bohemia				Silurian Ages of Europe	Ammonite Chrons of Northwest Europe		Permian of the Salt Range	Silurian 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																145
		Kimmeridgian																149.2
		Oxfordian																154.8
	Middle Jurassic	Callovian																161.5
		Bathonian																165.3
		Bajocian												Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites				168.2
		Bajocian													Humphresianum			168.4
		Aalenian												Concavum/Murchisonae/Opalinum				170.9
	Early Jurassic	Toarcian												Levesquei/Variabilis/Bifrons	Thouarsense			174.7
														Levesquei/Variabilis/Bifrons				180.1
														Serpentinum/Falciferum/Tenuicostatum				182
		Pliensbachian												Spinatum/Margaritatus/Davoei/Ibex/Jamesoni				184.2
		Sinemurian												Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi				192.9
		Hettangian												Angulata/Liasicus/Planorbis				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
		Induan																251.2
		Induan														Kathwai		251.5 *
Permian	Lopingian	Changhsingian														Kathwai		251.902
																		252.4 *
																Chhidru		252.9 *
		Wuchiapingian		Longtanian †		Zechstein										Chhidru		254.14
																Kalabagh		255 *
																Wargal		256 *
	Guadalupian	Capitanian				Rotliegendes												259.51
		Wordian																264.28
																		265.3 *
																Amb		266.1 *
		Roadian														Amb		266.9
		Roadian																270.7 *
	Cisuralian	Kungurian																273.01
		Artinskian			Autunian	283.5
		Sakmarian				290.1
		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				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				Gleedonian	Lockportian	427.4
		Homerian				Whitwellian	Lockportian	429.7 *
		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	Kosovian							443.8
		Katian	Kralodvorian							Bohdalec †	445.2
		Katian	Berounian								449.7 *
		Sandbian									453
											Zahorany †/Vinice	Letna †	456.2 *
										Liben †			458 *
	Middle Ordovician	Darriwilian											458.4
			Dobrotivian										458.5 *
			Oretanian										459.7 *
										Sarka †			461.7 *
		Dapingian								Klabava †			467.3
		Dapingian	Arenigian										468
	Early Ordovician	Floian	Arenigian										470
	Early Ordovician	Tremadocian	Tremadocian										477.7
Cambrian	Furongian	Stage 10	Niuchehean										Taoyuanian †		485.4
		Jiangshanian	Jiangshanian												489.5
		Paibian	Paibian												494
		Paibian	Paibian										Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian	Series 3 †										Guzhangian		Wangcunian †		497
		Drumian											Drumian		Wangcunian †		500.5
		Wuliuan		Stage 5 †									Wuliuan/Taijangian				504.5
	Series 2	Stage 4											Duyunian				509
	Series 2	Stage 3											Nangaoian				514
	Terreneuvian	Stage 2											Meishucunian				521
		Fortunian											Meishucunian				529
		Fortunian											Jinnigian				530.7
																		538.8