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
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, 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	Carbo-Permian of the Russian Platform	Cambrian of Kazakhstan	Permo-Triassic Subages of Eastern Europe	Silurian of North America			Cambrian of West Avalonia	Ordovician of North America
Quaternary	Holocene	Meghalayan																		0
		Northgrippian																		0.0042
		Greenlandian																		0.0082
	Pleistocene	Late Pleistocene																		0.0117
		Chibanian																		0.129
		Calabrian																		0.774
		Gelasian																		1.8
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							Vokhmian											247.2
	Early Triassic	Induan							Vokhmian											251.2
Permian	Lopingian	Changhsingian					Melekhovian													251.902
	Lopingian	Wuchiapingian		Longtanian †					Late Vyatkian/Early Vyatkian											254.14
	Guadalupian	Capitanian							Late Severodvinian/Early Severodvinian											259.51
		Wordian							Late Urzhumian/Early Urzhumian											264.28
		Wordian					Noginskian		Late Urzhumian/Early Urzhumian											264.9 *
		Roadian							Late Kazanian/Early Kazanian											266.9
	Cisuralian	Kungurian																		273.01
		Kungurian					Pavlovoposadian													276.8 *
		Artinskian					Pavlovoposadian													283.5
		Artinskian					Rusavkinian													287.6 *
		Sakmarian			290.1
		Asselian			293.52
Carboniferous	Pennsylvanian	Gzhelian			298.9
		Kasimovian			Dorogomilovian	303.7
					Khamovnikian	304.8
					Krevyakinian	305.8 *
		Moscovian			Myachkovian	307
					Podolskian	308.9 *
					Kashirian	311.4 *
					Vereian	313.8
					Melekessian	314.8
		Bashkirian			Melekessian	315.2
					Cheremshanian	316.9 *
					Prikamian	318.6 *
					Severokeltmian	319.9 *
					Krasnopolyanian	321.2 *
					Voznesenian	321.9 *
	Mississippian	Serpukhovian			Zapaltjubian	323.2
					Protvian	324.4 *
					Steshevian	326.8 *
					Tarusian	329 *
		Visean			Venevian	330.9
					Mikhailovian	331.9 *
					Aleksinian	333.7 *
			Tulian		335.8 *
			Bobrikian		339.9 *
			Radaevkian		343.4 *
		Tournaisian	Kosvian		346.7
			Kizelian		350.7 *
			Cherepetian		351.9 *
			Karakubian		354.4 *
			Upinian		356.3 *
			Malevkian		357.6 *
			Gumerovian		358 *
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				Ungurian	477.7
									Stairsian					480.3 *
									Skullrockian			Demingian †		482 *
Cambrian	Furongian	Stage 10							Skullrockian	Batyrbaian				Merioneth	Dolgellian/Trempealeauan	485.4
															Dolgellian/Trempealeauan	487.5
															Festiniogian	489.2 *
		Jiangshanian														489.5
										Aksaian						490.7 *
										Sakian						492.2 *
															Maentwrogian	493.1 *
		Paibian													Maentwrogian	494
	Miaolingian	Guzhangian								Series 3 †				Ayusokkanian	St Davids		497
														Ayusokkanian			Arcadian	498.4
																		499.5
		Drumian												Zhanaarykian				500.5
		Drumian												Tuesaian				503
		Wuliuan												Tuesaian				Stage 5 †	504.5
		Wuliuan																Stage 5 †	505.3
	Series 2	Stage 4															Branchian	Caerfai	509
														Toyonian					510 *
														Botomian					512.5 *
		Stage 3												Botomian					514
														Atdabanian					515.6 *
														Atdabanian			Placentian		517.1
	Terreneuvian	Stage 2	Tommotian											521
		Stage 2												525.5
		Fortunian												529
																				538.8