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
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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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			Silurian of the Baltic	South American Land Mammal Ages		Ordovician of Britain				Cambrian of Siberia
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 †	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			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			Ashgill	Hirnantian	443.8
		Katian				Rawtheyan	445.2
						Cautleyan	448.9 *
						Pusgillian	449.3 *
					Caradoc	Streffordian	Onnian †	449.6 *
						Cheneyan		451.5 *
						Burrellian		452.7 *
		Sandbian						453
							Actonian †	453.2 *
							Marshbrookian †	Woolstonian †	454.2 *
							Longvillian †		455.2 *
						Aurelucian	Longvillian †		456.8 *
						Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian			Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian				Abereiddian/Early Llanvirn			461.3 *
		Dapingian				Abereiddian/Early Llanvirn			467.3
		Dapingian			Arenig	Fennian			468.4 *
	Early Ordovician	Floian				Fennian			470
						Whitlandian			471.1 *
						Moridunian			474.3 *
		Tremadocian			Tremadoc	Migneintian			477.7
						Cressagian			480.8 *
						Cressagian			Mansian †	483.55 *
									Mansian †	485 *
Cambrian	Furongian	Stage 10							Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian	485.4
		Jiangshanian							Batyrbaian				489.5
									Aksaian				490.7 *
									Sakian				492.2 *
		Paibian		494
		Paibian		Ensyan †/Maduan/Nganasanian							494.7 *
	Miaolingian	Guzhangian		Series 3 †					Ayusokkanian			Middle Cambrian	497
		Guzhangian							Mayan/Menevian				499.5
		Drumian							Mayan/Menevian				500.5
		Wuliuan							Stage 5 †				Amgan/Solvan	504.5
	Series 2	Stage 4										Early Cambrian	Amgan/Solvan	509
										Toyonian			Lenian †	510 *
										Botomian				512.5 *
		Stage 3								Botomian				514
		Stage 3								Atdabanian				515.6 *
	Terreneuvian	Stage 2								Tommotian				521
		Stage 2								Nemakit-Daldynian				525.5
		Fortunian								Nemakit-Daldynian			Manykaian †	529
															538.8