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. 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
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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. 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			South American Land Mammal Ages		Paleogene Mammal Ages of Asia		Ordovician of Britain				Cretaceous Subepochs
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						Tabenbulakian	Hsandagolian						23.03
		Rupelian						Kekeamuan							27.82
		Rupelian				Tinguirirican		Kekeamuan							28.9 *
	Eocene	Priabonian				Tinguirirican		Houldjinian/Ergilian/Ulangochuian							33.9
		Priabonian				Divisaderan		Houldjinian/Ergilian/Ulangochuian							35.9 *
		Bartonian						Sharamurunian/Irdinmanhan/Arshantan							37.71
		Lutetian													41.2
		Lutetian				Mustersan									41.9 *
		Ypresian				Mustersan			Bumbanian						47.8
		Ypresian				Casamayoran			Bumbanian						47.9 *
	Paleocene	Thanetian				Riochican		Gashatan							56
						Itaboraian									56.9 *
						Peligran									58.9 *
		Selandian													59.2
		Danian													61.6
		Danian				Tiupampan									62.4 *
Cretaceous	Late Cretaceous	Maastrichtian												Senonian	66
		Campanian													72.1
		Santonian													83.6
		Coniacian													86.3
		Turonian													89.8
		Cenomanian													93.9
	Early Cretaceous	Albian												Gallic	100.5
		Aptian													113
		Barremian													121.4
		Hauterivian												Neocomian	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			Late Pennsylvanian		298.9
		Kasimovian			Late Pennsylvanian		303.7
		Moscovian			Middle Pennsylvanian		307
		Bashkirian			Early Pennsylvanian		315.2
	Mississippian	Serpukhovian			Late Mississippian		323.2
		Visean			Middle Mississippian		330.9
		Tournaisian			Early Mississippian		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						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					Ashgill	Hirnantian	Harju	Porkuni	443.8
		Katian						Rawtheyan		Pirgu	445.2
								Cautleyan			448.9 *
			Pusgillian			449.3 *
			Caradoc			Streffordian	Onnian †	Vormsi		449.6 *
								Nabala		Johvi †	450 *
								Viru	Rakvere		450.6 *
						Cheneyan			Rakvere		451.5 *
						Cheneyan			Oandu		452 *
						Burrellian			Oandu		452.7 *
		Sandbian							Keila	Idavere †	453
							Actonian †		Keila		453.2 *
							Actonian †		Haljala		453.9
							Marshbrookian †				Woolstonian †	454.2 *
							Longvillian †					455.2 *
									Kukruse			456.4 *
						Aurelucian						456.8 *
							Soudleyan †/Harnagian/Costonian					457.4 *
							Soudleyan †/Harnagian/Costonian		Uhaku	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian	Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Uhaku			458.4
									Lasnamagi			458.9 *
									Aseri			460.4 *
						Abereiddian/Early Llanvirn			Aseri			461.3 *
								Oeland	Kunda			462.9 *
									Kunda	Valaste †/Hunderum		464.3 *
									Volkhov			Langevoja †/Vaana/Saka	467.1 *
		Dapingian											467.3
			Arenig			Fennian							468.4 *
									Billingen				469.3 *
	Early Ordovician	Floian											470
										Latorp †			470.1 *
						Whitlandian							471.1 *
						Whitlandian			Hunneberg				473.7 *
						Moridunian							474.3 *
		Tremadocian	Tremadoc			Migneintian							477.7
				Cressagian		480.8 *
						Varangu			481.3 *
						Pakerort			482.2 *
									485 *
Cambrian	Furongian	Stage 10								485.4
										486.3 *
										486.5
		Jiangshanian								489.5
		Paibian								494
	Miaolingian	Guzhangian								Series 3 †			497
		Drumian											500.5
		Wuliuan											Stage 5 †	504.5
															509