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
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, 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			Cambrian of Kazakhstan	Ordovician of the Baltic				South American Land Mammal Ages		Permian of Western Europe
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		251.902
	Lopingian	Wuchiapingian		Longtanian †	Zechstein	254.14
	Guadalupian	Capitanian			Rotliegendes	259.51
		Wordian				264.28
		Roadian				266.9
	Cisuralian	Kungurian				273.01
		Artinskian			Autunian	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				Late Famennian	358.9
						Middle Famennian	365.3 *
						Early Famennian	368.5 *
		Frasnian				Late Frasnian	372.2
						Middle Frasnian	375.4 *
						Early Frasnian	379.3 *
	Middle Devonian	Givetian				Late Givetian	382.7
						Middle Givetian	383.7 *
						Early Givetian	385.9 *
		Eifelian				Late Eifelian	387.7
		Eifelian				Early Eifelian	390.3 *
	Early Devonian	Emsian				Late Emsian	393.3
		Emsian				Early Emsian	398.3 *
		Pragian				Pragian	407.6
		Lochkovian				Late Lochkovian	410.8
						Middle Lochkovian	412.8 *
						Early Lochkovian	415.6 *
Silurian	Pridoli						419.2
	Ludlow	Ludfordian	423
	Ludlow	Gorstian	425.6
	Wenlock	Homerian	427.4
	Wenlock	Sheinwoodian	430.5
	Llandovery	Telychian	433.4
		Aeronian	438.5
		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			Ungurian	477.7
							Varangu				481.3 *
							Pakerort				482.2 *
Cambrian	Furongian	Stage 10					Pakerort	Batyrbaian			Franconian †/Dresbachian/Millardan	485.4
							486.3 *
							486.5
							Sunwaptan					487.5
		Jiangshanian										489.5
								Aksaian				490.7 *
								Sakian				492.2 *
							Steptoean					493 *
		Paibian			494		Steptoean
	Miaolingian	Guzhangian			Series 3 †		Ayusokkanian	Marjumian			Albertian †	497
		Guzhangian										499.5
		Drumian					Zhanaarykian					500.5
		Drumian					Tuesaian					503
		Wuliuan					Tuesaian	Stage 5 †				Topazan	504.5
												Topazan	505.3
												Delamaran	506.5
	Series 2	Stage 4									Waucoban †		509
							Toyonian						510 *
							Toyonian					Dyeran	511 *
							Botomian						512.5 *
		Stage 3											514
												Montezuman	514.8 *
							Atdabanian					Montezuman	515.6 *
							Atdabanian					Begadean	519.9 *
	Terreneuvian	Stage 2					Tommotian						521
		Stage 2											525.5
		Fortunian											529
														538.8