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
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			Ordovician of the Baltic				Silurian Ages of Europe	Ordovician of Ibero-Bohemia				Ordovician of North America					Obsolete Carboniferous Ages 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																			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																		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			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				Harju	Porkuni	Kosovian	Cincinnatian	Gamachian	443.8
		Katian	Pirgu				Kralodvorian	Bohdalec †		Gamachian	445.2
			Pirgu							Richmondian	446 *
			Vormsi								449.6 *
							Berounian				449.7 *
										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
						Haljala							Zahorany †/Vinice	Letna †	456.2 *
						Kukruse									456.4 *
						Kukruse			Whiterockian		Canadian †				Chazyan †/Marmor	457 *
						Uhaku						Aluoja †				457.5 *
								Liben †								458 *
	Middle Ordovician	Darriwilian														458.4
							Dobrotivian									458.5 *
						Lasnamagi	Dobrotivian									458.9 *
						Lasnamagi	Oretanian									459.7 *
						Aseri										460.4 *
						Aseri		Sarka †								461.7 *
			Oeland			Kunda										462.9 *
						Kunda						Valaste †/Hunderum				464.3 *
						Volkhov										Langevoja †/Vaana/Saka	467.1 *
		Dapingian						Klabava †									467.3
							Arenigian										468
										Rangerian							469.1 *
						Billingen				Rangerian							469.3 *
	Early Ordovician	Floian							Ibexian	Blackhillsian					Jeffersonian †		Cassinian †	470
				Latorp †												470.1 *
						Hunneberg										473.7 *
										Tulean						473.9 *
		Tremadocian					Tremadocian			Tulean						477.7
										Stairsian						480.3 *
						Varangu				Stairsian						481.3 *
						Varangu				Skullrockian						Demingian †	482 *
						Pakerort										Demingian †	482.2 *
Cambrian	Furongian	Stage 10				Pakerort											485.4
																	486.3 *
																	486.5
																	487.5
		Jiangshanian															489.5
		Paibian															494
	Miaolingian	Guzhangian															Series 3 †	497
		Drumian																500.5
		Wuliuan																Stage 5 †	504.5
																					509