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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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

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			Permian of North America		Cambrian of China	Obsolete Carboniferous Ages of China	Cambrian Epochs	Cambrian of Siberia			Ordovician of the Baltic		Silurian of the Baltic	Ordovician 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																	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																	251.902
	Lopingian	Wuchiapingian		Longtanian †															254.14
	Guadalupian	Capitanian				Capitanian													259.51
		Wordian				Wordian													264.28
		Roadian				Roadian													266.9
	Cisuralian	Kungurian				Leonardian	Cathedralian												273.01
		Kungurian					Hessian												281.9 *
		Artinskian					Hessian												283.5
		Artinskian				Wolfcampian	Lenoxian												286.1 *
		Sakmarian					Lenoxian												290.1
		Asselian					Nealian												293.52
Carboniferous	Pennsylvanian	Gzhelian							Mapingian †										298.9
		Kasimovian							Mapingian †										303.7
		Kasimovian																	305.9
		Moscovian																	307
		Bashkirian																	315.2
	Mississippian	Serpukhovian																	323.2
		Visean			330.9
		Tournaisian			346.7
Devonian	Late Devonian	Famennian			Late Famennian			358.9
					Middle Famennian			365.3 *
					Early Famennian			368.5 *
		Frasnian			Late Frasnian			372.2
					Middle Frasnian			375.4 *
					Early Frasnian			379.3 *
	Middle Devonian	Givetian			Late Givetian			382.7
					Middle Givetian			383.7 *
					Early Givetian			385.9 *
		Eifelian			Late Eifelian			387.7
		Eifelian			Early Eifelian			390.3 *
	Early Devonian	Emsian			Late Emsian			393.3
		Emsian			Early Emsian			398.3 *
		Pragian			Pragian			407.6
		Lochkovian			Late Lochkovian			410.8
			Middle Lochkovian		412.8 *
			Early Lochkovian		415.6 *
Silurian	Pridoli				Ohesaare			419.2
	Pridoli				Kaugetuma			421.7 *
	Ludlow	Ludfordian			Kuressaare			423
		Ludfordian			Paadla			423.4 *
		Gorstian			Paadla			425.6
	Wenlock	Homerian			Rootsikula			427.4
		Homerian			Jaagarahu			429.2 *
		Sheinwoodian			Jaagarahu			430.5
		Sheinwoodian			Jaani			431.8 *
	Llandovery	Telychian			Jaani			433.4
		Telychian			Adavere			434 *
		Aeronian			Adavere			438.5
		Aeronian			Raikkula			439.4 *
		Rhuddanian			Raikkula			440.8
		Rhuddanian			Juuru			441.4 *
Ordovician	Late Ordovician	Hirnantian			Harju			Porkuni		Cincinnatian	Gamachian	443.8
		Katian						Pirgu			Gamachian	445.2
								Pirgu			Richmondian	446 *
								Vormsi			Richmondian	449.6 *
								Vormsi			Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
								Nabala			Maysvillian		Johvi †	450 *
								Nabala			Edenian			450.4 *
					Viru			Rakvere			Edenian			450.6 *
								Rakvere		Mohawkian	Chatfieldian			451.1 *
								Oandu						452 *
		Sandbian						Keila					Idavere †	453
								Keila			Turinian			453.7 *
								Haljala						453.9
								Kukruse						456.4 *
								Kukruse		Whiterockian		Canadian †		Chazyan †/Marmor	457 *
				Uhaku				Aluoja †					457.5 *
	Middle Ordovician	Darriwilian		Uhaku									458.4
				Lasnamagi									458.9 *
				Aseri									460.4 *
				Oeland	Kunda								462.9 *
					Kunda			Valaste †/Hunderum					464.3 *
					Volkhov								Langevoja †/Vaana/Saka		467.1 *
		Dapingian													467.3
											Rangerian				469.1 *
					Billingen	469.3 *					Rangerian
	Early Ordovician	Floian				Ibexian	Blackhillsian			Jeffersonian †	Cassinian †			470
								Latorp †					470.1 *
					Hunneberg								473.7 *
							Tulean						473.9 *
		Tremadocian					Tulean						477.7
							Stairsian						480.3 *
					Varangu		Stairsian						481.3 *
					Varangu		Skullrockian				Demingian †		482 *
					Pakerort								482.2 *
													Mansian †	483.55 *
Cambrian	Furongian	Stage 10						Niuchehean		Taoyuanian †	Late Cambrian	Batyrbaian	Tavgian †	Ketyan †/Yurakian		485.4
																486.3 *
																486.5
																487.5
		Jiangshanian						Jiangshanian								489.5
												Aksaian				490.7 *
												Sakian				492.2 *
		Paibian						Paibian								494
														Ensyan †/Maduan/Nganasanian		494.7 *
										Waergangian †/Youshuanian				Ensyan †/Maduan/Nganasanian		494.9 *
	Miaolingian	Guzhangian						Series 3 †		Guzhangian	Wangcunian †	Middle Cambrian	Ayusokkanian				497
		Guzhangian								Guzhangian			Mayan/Menevian				499.5
		Drumian								Drumian			Mayan/Menevian				500.5
		Wuliuan								Stage 5 †	Wuliuan/Taijangian						Amgan/Solvan	504.5
	Series 2	Stage 4								Duyunian	Early Cambrian	509					Amgan/Solvan
												Toyonian		Lenian †			510 *
												Botomian					512.5 *
		Stage 3								Nangaoian		Botomian					514
		Stage 3								Nangaoian		Atdabanian					515.6 *
	Terreneuvian	Stage 2								Meishucunian		Tommotian					521
		Stage 2										Nemakit-Daldynian					525.5
		Fortunian												Manykaian †			529
		Fortunian								Jinnigian				Manykaian †			530.7
																			538.8