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			Ordovician of Australia	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	Bolindian					Cincinnatian	Gamachian	Harju	Porkuni	443.8
		Katian							Gamachian		Pirgu	445.2
									Richmondian			446 *
			Eastonian									449 *
											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 *
			Gisbornian								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	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	Yapeenian												467.3
			Castlemainian												468.5 *
									Rangerian						469.1 *
									Rangerian	Billingen					469.3 *
	Early Ordovician	Floian	Chewtonian					Ibexian	Blackhillsian					Jeffersonian †	Cassinian †	470
			Chewtonian								Latorp †					470.1 *
			Bendigonian													471.8 *
			Lancefieldian													473.5 *
										Hunneberg						473.7 *
									Tulean							473.9 *
		Tremadocian							Tulean							477.7
									Stairsian							480.3 *
									Stairsian	Varangu						481.3 *
									Skullrockian	Varangu					Demingian †	482 *
										Pakerort						482.2 *
			Warendian													482.8 *
Cambrian	Furongian	Stage 10														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