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. J. Prevosti, C. O. Romano, A. M. Forasiepi, S. Hemming, R. Bonini, A. M. Candela, E. Cerdeño, M. C. Madozzo Jaén, P. E. Ortiz, F. Pujos, L. Rasia, G. I. Schmidt, M. Taglioretti, R. D. E. MacPhee, and U. F. J. Pardiñas. 2021. New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America. Scientific Reports 2021(11):9830 view
J. J. Flynn and C. C. Swisher, III. 1995. Cenozoic South American Land Mammal Ages: correlation to global geochronology. Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication 54:317-333 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

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 France	Devonian of Eastern North America		Permian Subages of Germany	Cambrian of Britain		Silurian of North America			South American Land Mammal Ages		Ordovician of the Baltic
Quaternary	Pleistocene	Late Pleistocene													Lujanian			0.0117
		Chibanian													Lujanian			0.129
		Chibanian													Ensenadan			0.3 *
		Calabrian													Ensenadan			0.774
		Calabrian													Sanandresian	Uquian †		1.7 *
		Gelasian													Sanandresian			1.8
Neogene	Pliocene	Piacenzian	Tertiary †												Vorohuean			2.58
		Piacenzian													Chapadmalalan			2.9 *
		Zanclean													Chapadmalalan			3.6
															Montehermosan			3.7 *
															Huayquerian			4.9 *
	Miocene	Messinian																5.333
		Tortonian																7.246
															Chasicoan			7.9 *
															Mayoan			9.9 *
															Laventan			10.9 *
		Serravallian													Laventan			11.63
		Serravallian													Colloncuran			13.7 *
		Langhian													Colloncuran			13.82
		Langhian													Friasian			15.4 *
		Burdigalian													Friasian			15.98
															Santacrucian			16.2 *
															Colhuehuapian			17.4 *
		Aquitanian													Colhuehuapian			20.44
		Aquitanian													Deseadan			20.9 *
Paleogene	Oligocene	Chattian																23.03
		Rupelian																27.82
		Rupelian													Tinguirirican			28.9 *
	Eocene	Priabonian													Tinguirirican			33.9
		Priabonian													Divisaderan			35.9 *
		Bartonian																37.71
		Lutetian																41.2
		Lutetian													Mustersan			41.9 *
		Ypresian													Mustersan			47.8
		Ypresian													Casamayoran			47.9 *
	Paleocene	Thanetian													Riochican			56
															Itaboraian			56.9 *
															Peligran			58.9 *
		Selandian																59.2
		Danian																61.6
		Danian													Tiupampan			62.4 *
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		Buntsandstein	251.902
	Lopingian	Wuchiapingian		Buntsandstein	Longtanian †	254.14
	Guadalupian	Capitanian			Ohre/Aller	259.51
		Wordian			Leine	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				Famennian	Conewangan/Conneautan/Canadaway	358.9
	Late Devonian	Frasnian				Frasnian	West Fallsian/Sonyean	372.2
	Middle Devonian	Givetian				Givetian	Geneseean/Taghanican/Tioughniogan	Cazenovian	382.7
	Middle Devonian	Eifelian				Couvinien	Southwoodian	Cazenovian	387.7
	Early Devonian	Emsian					Sawkillian/Deer Parkian	Helderbergian	393.3
		Pragian							407.6
		Pragian				Coblencien			408.2 *
		Lochkovian				Gedinnine			410.8
Silurian	Pridoli								Cayugan	419.2
	Pridoli								Niagaran	422.5 *
	Ludlow	Ludfordian								423
	Ludlow	Gorstian								425.6
	Wenlock	Homerian								Lockportian	427.4
	Wenlock	Sheinwoodian									430.5
	Llandovery	Telychian								Ontarian	433.4
		Aeronian									438.5
											Alexandrian	438.7 *
									Medinan	Clinton		440.1 *
										440.7 *
		Rhuddanian								440.8
Ordovician	Late Ordovician	Hirnantian									Harju	Porkuni	443.8
		Katian										Pirgu	445.2
												Vormsi	449.6 *
												Nabala	Johvi †	450 *
											Viru	Rakvere		450.6 *
												Oandu		452 *
		Sandbian										Keila	Idavere †	453
												Haljala		453.9
												Kukruse		456.4 *
												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										Volkhov			467.3
		Dapingian										Billingen			469.3 *
	Early Ordovician	Floian													470
													Latorp †		470.1 *
												Hunneberg			473.7 *
		Tremadocian										Hunneberg			477.7
												Varangu			481.3 *
												Pakerort			482.2 *
Cambrian	Furongian	Stage 10										Pakerort	Merioneth		Dolgellian/Trempealeauan		485.4
																	486.3 *
																	486.5
															Festiniogian		489.2 *
		Jiangshanian													Festiniogian		489.5
		Jiangshanian													Maentwrogian		493.1 *
		Paibian		494											Maentwrogian
	Miaolingian	Guzhangian		Series 3 †									St Davids				497
		Drumian			500.5
		Wuliuan			Stage 5 †												504.5
	Series 2	Stage 4											Caerfai				509
	Series 2	Stage 3															514
	Terreneuvian	Stage 2															521
	Terreneuvian	Fortunian															529
																		538.8