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. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 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			Cambrian of North America		Paleogene Mammal Ages of Asia		Ordovician of Britain				Cretaceous Subepochs	Carboniferous Subepochs	Ordovician of the Baltic
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						Tabenbulakian	Hsandagolian								23.03
	Oligocene	Rupelian						Kekeamuan	Hsandagolian								27.82
	Eocene	Priabonian						Houldjinian/Ergilian/Ulangochuian									33.9
		Bartonian						Sharamurunian/Irdinmanhan/Arshantan									37.71
		Lutetian															41.2
		Ypresian							Bumbanian								47.8
	Paleocene	Thanetian						Gashatan									56
		Selandian															59.2
		Danian															61.6
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						Franconian †/Dresbachian/Millardan				485.4
												486.3 *
												486.5
												Sunwaptan	487.5
		Jiangshanian										Sunwaptan	489.5
		Jiangshanian										Steptoean	493 *
		Paibian										Steptoean	494
	Miaolingian	Guzhangian						Series 3 †				Marjumian	Albertian †	497
		Drumian										Marjumian		500.5
		Wuliuan										Stage 5 †		Topazan		504.5
		Wuliuan										Stage 5 †		Delamaran	506.5
	Series 2	Stage 4											Waucoban †	Delamaran	509
		Stage 4												Dyeran	511 *
		Stage 3												Dyeran	514
														Montezuman	514.8 *
														Begadean	519.9 *
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																	538.8