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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Ordovician of China			Devonian of Czechoslovakia	Permian of North America		Carboniferous of Western Europe			Devonian of Germany	Cambrian of Britain		Permian of China
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																	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																Meishanian	251.902
		Changhsingian																Baoqingian	253.4 *
		Wuchiapingian		Longtanian †														Laoshanian	254.14
		Wuchiapingian		Longtanian †														Laibinian	257.7 *
	Guadalupian	Capitanian								Capitanian								Lengwuan	259.51
		Wordian								Wordian								Kuhfengian	264.28
		Roadian								Roadian								Kuhfengian	266.9
	Cisuralian	Kungurian								Leonardian	Cathedralian							Luodianian	273.01
		Kungurian									Hessian								281.9 *
		Artinskian																	283.5
																		Longlinian	285.4 *
										Wolfcampian	Lenoxian								286.1 *
		Sakmarian									Lenoxian								290.1
		Asselian									Nealian							Zisongian	293.52
		Asselian									Nealian	Kuzel							297.7
Carboniferous	Pennsylvanian	Gzhelian																	298.9
																			300.1
					Stephanian	Stephanian C	300.3 *
						Stephanian B	300.9 *
						Stephanian A	301.4 *
		Kasimovian				Stephanian A	303.7
		Kasimovian				Cantabrian	305 *
		Moscovian				Cantabrian	307
					Westphalian	Westphalian D	307.4 *
						Westphalian C	309.8
						Westphalian B	314.6
		Bashkirian				Westphalian B	315.2
						Westphalian A	317 *
					Namurian	Yeadonian	318.8 *
						Marsdenian	320.2 *
						Kinderscoutian	321.5 *
						Alportian	322 *
						Chokierian	323.1 *
	Mississippian	Serpukhovian				Chokierian	323.2
			Arnsbergian			324 *
			Pendleian			327.4 *
		Visean	Warnantian		Brigantian †	330.9
			Livian		Asbian †	336.3 *
			Moliniacian		Holkerian †/Arundian/Chadian	340.2 *
		Tournaisian	Ivorian			346.7
		Tournaisian	Hastarian			353.7 *
Devonian	Late Devonian	Famennian				Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian				Adorf	372.2
	Middle Devonian	Givetian				Srbsko	Givetian	382.7
	Middle Devonian	Eifelian				Chotec	Eifelian	387.7
	Early Devonian	Emsian				Daleje/Zlichovian	Emsian	393.3
		Pragian				Pragian	Siegen	407.6
		Lochkovian				Lochkovian	Gedinnine	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					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											Merioneth	Dolgellian/Trempealeauan	485.4
		Stage 10												Festiniogian	489.2 *
		Jiangshanian												Festiniogian	489.5
		Jiangshanian												Maentwrogian	493.1 *
		Paibian												Maentwrogian	494
	Miaolingian	Guzhangian											Series 3 †	St Davids		497
		Drumian														500.5
		Wuliuan														Stage 5 †	504.5
	Series 2	Stage 4														Caerfai	509
	Series 2	Stage 3								514
	Terreneuvian	Stage 2								521
	Terreneuvian	Fortunian								529
																			538.8