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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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			Devonian of Germany	Devonian Subages	Cretaceous North American Land-Mammal Ages	Silurian of the Baltic	Ordovician of North America						Ordovician of the Baltic
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						Lancian/Edmontonian										66
		Campanian						Judithian/Aquilan										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																298.9
		Kasimovian			303.7
		Moscovian			307
		Bashkirian			315.2
	Mississippian	Serpukhovian			323.2
		Visean			330.9
		Tournaisian			346.7
Devonian	Late Devonian	Famennian			Wocklum/Dasberg/Hemberg/Nehden	Late Famennian	358.9
						Middle Famennian	365.3 *
						Early Famennian	368.5 *
		Frasnian			Adorf	Late Frasnian	372.2
						Middle Frasnian	375.4 *
						Early Frasnian	379.3 *
	Middle Devonian	Givetian			Givetian	Late Givetian	382.7
						Middle Givetian	383.7 *
						Early Givetian	385.9 *
		Eifelian			Eifelian	Late Eifelian	387.7
		Eifelian			Eifelian	Early Eifelian	390.3 *
	Early Devonian	Emsian			Emsian	Late Emsian	393.3
		Emsian			Emsian	Early Emsian	398.3 *
		Pragian			Siegen	Pragian	407.6
		Lochkovian			Gedinnine	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					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		Rakvere			451.1 *
										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
		Drumian														500.5
		Wuliuan														Stage 5 †	504.5
	Series 2	Stage 4															509
	Series 2	Stage 3															514
	Terreneuvian	Stage 2															521
	Terreneuvian	Fortunian															529
																		538.8