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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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			Silurian of the Baltic	Permian of China	Cenozoic Subepochs	Carboniferous of Western Europe		Cambrian of West Avalonia
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									23.03
	Oligocene	Rupelian						Early Oligocene									27.82
	Eocene	Priabonian						Late Eocene									33.9
		Bartonian						Middle Eocene									37.71
		Lutetian						Middle Eocene									41.2
		Ypresian						Early Eocene									47.8
	Paleocene	Thanetian						Late Paleocene									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															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					Lengwuan										259.51
		Wordian					Kuhfengian										264.28
		Roadian					Kuhfengian										266.9
	Cisuralian	Kungurian					Luodianian										273.01
		Artinskian					Luodianian										283.5
		Artinskian					Longlinian										285.4 *
		Sakmarian					Longlinian										290.1
		Asselian					Zisongian										293.52
		Asselian							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					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						Ohesaare	Cayugan	419.2
							Kaugetuma	Cayugan	421.7 *
							Kaugetuma	Niagaran	422.5 *
	Ludlow	Ludfordian					Kuressaare		423
		Ludfordian					Paadla		423.4 *
		Gorstian					Paadla		425.6
	Wenlock	Homerian					Rootsikula		Lockportian	427.4
		Homerian					Jaagarahu		Lockportian	429.2 *
		Sheinwoodian					Jaagarahu			430.5
		Sheinwoodian					Jaani			431.8 *
	Llandovery	Telychian					Jaani		Ontarian	433.4
		Telychian					Adavere			434 *
		Aeronian								438.5
										Alexandrian	438.7 *
							Raikkula				439.4 *
								Medinan	Clinton		440.1 *
											440.7 *
		Rhuddanian									440.8
		Rhuddanian					Juuru				441.4 *
Ordovician	Late Ordovician	Hirnantian						Cincinnatian		Gamachian		443.8
		Katian								Gamachian		445.2
										Richmondian		446 *
				Maysvillian						Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian		449.8 *
				Edenian								450.4 *
				Mohawkian				Chatfieldian				451.1 *
		Sandbian						Chatfieldian				453
								Turinian				453.7 *
				Whiterockian						Canadian †		Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian											458.4
		Dapingian											467.3
		Dapingian						Rangerian					469.1 *
	Early Ordovician	Floian		Ibexian				Blackhillsian				Jeffersonian †	Cassinian †	470
		Floian			Tulean			473.9 *
		Tremadocian			Tulean			477.7
					Stairsian			480.3 *
					Skullrockian			Demingian †					482 *
Cambrian	Furongian	Stage 10			Skullrockian								485.4
		Stage 10											487.5
		Jiangshanian											489.5
		Paibian											494
	Miaolingian	Guzhangian											Series 3 †	497
		Guzhangian												Arcadian	498.4
		Drumian													500.5
		Wuliuan													Stage 5 †	504.5
	Series 2	Stage 4													Branchian	509
		Stage 3													Branchian	514
		Stage 3													Placentian	517.1
	Terreneuvian	Stage 2														521
	Terreneuvian	Fortunian														529
																	538.8