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
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			Ordovician of Australia		Ordovician of Ibero-Bohemia			Devonian of Czechoslovakia	Cenozoic Subepochs	Silurian of North America			Ordovician of the Baltic
Quaternary	Pleistocene	Late Pleistocene										Late Pleistocene							0.0117
		Chibanian										Middle Pleistocene							0.129
		Calabrian										Early Pleistocene							0.774
		Gelasian										Early Pleistocene							1.8
Neogene	Pliocene	Piacenzian	Tertiary †									Late Pliocene							2.58
	Pliocene	Zanclean										Early Pliocene							3.6
	Miocene	Messinian										Late Miocene							5.333
		Tortonian										Late Miocene							7.246
		Serravallian										Middle Miocene							11.63
		Langhian										Middle Miocene							13.82
		Burdigalian										Early Miocene							15.98
		Aquitanian										Early Miocene							20.44
Paleogene	Oligocene	Chattian										Late Oligocene							23.03
	Oligocene	Rupelian										Early Oligocene							27.82
	Eocene	Priabonian										Late Eocene							33.9
		Bartonian										Middle Eocene							37.71
		Lutetian										Middle Eocene							41.2
		Ypresian										Early Eocene							47.8
	Paleocene	Thanetian										Late Paleocene							56
		Selandian										Middle Paleocene							59.2
		Danian										Early Paleocene							61.6
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			Srbsko	382.7
	Middle Devonian	Eifelian			Chotec	387.7
	Early Devonian	Emsian			Daleje/Zlichovian	393.3
		Pragian			Pragian	407.6
		Lochkovian			Lochkovian	410.8
Silurian	Pridoli				Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	Cayugan	419.2
						Bringewood/Elton	Cayugan	421.3
						Bringewood/Elton	Niagaran	422.5 *
	Ludlow	Ludfordian			Coalbrookdale	Wenlock (England)/Tickwood		423
		Gorstian						425.6
		Gorstian				Buildwas		426.4 *
	Wenlock	Homerian				Buildwas		Lockportian	427.4
		Homerian			Wych	Woolhope		Lockportian	428.4 *
		Sheinwoodian							430.5
	Llandovery	Telychian						Ontarian	433.4
		Telychian							436.3 *
		Aeronian	438.5
			Alexandrian						438.7 *
					Cowleigh Park				439.3 *
							Medinan	Clinton	440.1 *
									440.7 *
		Rhuddanian							440.8
Ordovician	Late Ordovician	Hirnantian	Bolindian				Kosovian			Harju	Porkuni	443.8
		Katian	Bolindian				Kralodvorian				Bohdalec †	Pirgu	445.2
			Eastonian									Pirgu	449 *
												Vormsi	449.6 *
							Berounian					Vormsi	449.7 *
												Nabala	Johvi †	450 *
										Viru		Rakvere		450.6 *
			Gisbornian									Oandu		452 *
		Sandbian										Keila	Idavere †	453
												Haljala		453.9
												Haljala		Zahorany †/Vinice	Letna †	456.2 *
												Kukruse				456.4 *
												Uhaku	Aluoja †			457.5 *
											Liben †					458 *
	Middle Ordovician	Darriwilian	Darriwilian													458.4
							Dobrotivian									458.5 *
							Dobrotivian					Lasnamagi				458.9 *
							Oretanian					Lasnamagi				459.7 *
												Aseri				460.4 *
											Sarka †	Aseri				461.7 *
										Oeland		Kunda				462.9 *
												Kunda	Valaste †/Hunderum			464.3 *
												Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian	Yapeenian								Klabava †						467.3
			Yapeenian				Arenigian										468
			Castlemainian														468.5 *
			Castlemainian	Billingen								469.3 *
	Early Ordovician	Floian	Chewtonian									470
			Chewtonian									Latorp †				470.1 *
			Bendigonian													471.8 *
			Lancefieldian													473.5 *
				Hunneberg												473.7 *
		Tremadocian		Hunneberg			Tremadocian									477.7
				Varangu												481.3 *
				Pakerort												482.2 *
			Warendian													482.8 *
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