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
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
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. 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
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

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International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Ammonite Chrons of Northwest Europe		Ordovician of China			Silurian Ages of Europe	Ordovician of North America					Cretaceous Subepochs	Cenozoic Subepochs
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															Senonian		66
		Campanian																	72.1
		Santonian																	83.6
		Coniacian																	86.3
		Turonian																	89.8
		Cenomanian																	93.9
	Early Cretaceous	Albian															Gallic		100.5
		Aptian																	113
		Barremian																	121.4
		Hauterivian															Neocomian		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
	Early Triassic	Induan																	251.2
Permian	Lopingian	Changhsingian																	251.902
	Lopingian	Wuchiapingian		Longtanian †															254.14
	Guadalupian	Capitanian																	259.51
		Wordian																	264.28
		Roadian																	266.9
	Cisuralian	Kungurian																	273.01
		Artinskian																	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				419.2
	Ludlow	Ludfordian			423
	Ludlow	Gorstian			425.6
	Wenlock	Homerian			Gleedonian			427.4
		Homerian			Whitwellian			429.7 *
		Sheinwoodian						430.5
	Llandovery	Telychian						433.4
		Aeronian						438.5
		Rhuddanian	440.8
Ordovician	Late Ordovician	Hirnantian	Hirnantian					Xiaoxita †/Shikou	Wufeng †	Cincinnatian	Gamachian	443.8
		Katian	Chientangkiangian								Gamachian	445.2
			Chientangkiangian								Richmondian	446 *
			Neichianshanian/Hanjiang								Richmondian	449.5
											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	Darriwilian					Guniu †/Hulo						458.4
		Darriwilian	Darriwilian					Hunjiang †	Dawan †/Daobaowan/Ningkuo					466.3 *
		Dapingian	Dapingian											467.3
		Dapingian	Dapingian								Rangerian			469.1 *
	Early Ordovician	Floian	Yiyangian							Ibexian	Blackhillsian		Jeffersonian †	Cassinian †	470
		Floian	Yiyangian								Tulean				473.9 *
		Tremadocian	Xinchangian												477.7
									Lianghekou †						477.9 *
											Stairsian				480.3 *
											Skullrockian			Demingian †	482 *
Cambrian	Furongian	Stage 10									Skullrockian			Late Cambrian	485.4
		Stage 10													487.5
		Jiangshanian													489.5
		Paibian													494
	Miaolingian	Guzhangian												Series 3 †	Middle Cambrian	497
		Drumian				500.5
		Wuliuan		Stage 5 †		504.5
	Series 2	Stage 4												Early Cambrian	509
	Series 2	Stage 3													514
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																			538.8