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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Carboniferous Subepochs	Cambrian of West Avalonia	Cretaceous Subepochs	Silurian of the Baltic	Ordovician of North America						Ordovician of the Baltic
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						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															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				Late Pennsylvanian											298.9
		Kasimovian				Late Pennsylvanian											303.7
		Moscovian				Middle Pennsylvanian											307
		Bashkirian				Early Pennsylvanian											315.2
	Mississippian	Serpukhovian				Late Mississippian											323.2
		Visean				Middle Mississippian											330.9
		Tournaisian				Early Mississippian											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				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	438.5		Adavere
		Aeronian	Raikkula		439.4 *
		Rhuddanian	Raikkula		440.8
		Rhuddanian	Juuru		441.4 *
Ordovician	Late Ordovician	Hirnantian			Cincinnatian		Gamachian		Harju	Porkuni	443.8
		Katian					Gamachian			Pirgu	445.2
							Richmondian			Pirgu	446 *
							Richmondian			Vormsi	449.6 *
							Maysvillian			Vormsi	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Maysvillian			Nabala		Johvi †	450 *
							Edenian			Nabala			450.4 *
							Edenian		Viru	Rakvere			450.6 *
					Mohawkian		Chatfieldian	451.1 *		Rakvere
								Oandu		452 *
		Sandbian						Keila		Idavere †		453
							Turinian	Keila				453.7 *
								Haljala				453.9
								Kukruse				456.4 *
					Whiterockian			Kukruse			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 *
							Rangerian		Billingen					469.3 *
	Early Ordovician	Floian			Ibexian		Blackhillsian					Jeffersonian †		Cassinian †	470
										Latorp †					470.1 *
									Hunneberg						473.7 *
				Tulean			473.9 *
		Tremadocian		Tulean			477.7
				Stairsian			480.3 *
				Stairsian			Varangu		481.3 *
				Skullrockian			Varangu		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
		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