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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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			Neogene Mammal Ages of China	Ordovician of Ibero-Bohemia				Permian of China	Devonian Subages	Permian of North America
Quaternary	Pleistocene	Late Pleistocene				Nihewanian									0.0117
		Chibanian													0.129
		Calabrian													0.774
		Gelasian													1.8
Neogene	Pliocene	Piacenzian	Tertiary †			Yushean									2.58
		Zanclean				Yushean									3.6
		Zanclean				Baodean									4.9
	Miocene	Messinian													5.333
		Tortonian													7.246
		Tortonian				Tunggurian									11.1
		Serravallian				Tunggurian									11.63
		Langhian				Shanwangian									13.82
		Burdigalian				Shanwangian									15.98
		Burdigalian				Xiejiaan									16.9
		Aquitanian				Xiejiaan									20.44
Paleogene	Oligocene	Chattian													23.03
	Oligocene	Rupelian													27.82
	Eocene	Priabonian													33.9
		Bartonian													37.71
		Lutetian													41.2
		Ypresian													47.8
	Paleocene	Thanetian													56
		Selandian													59.2
		Danian													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									Meishanian				251.902
		Changhsingian									Baoqingian				253.4 *
		Wuchiapingian		Longtanian †							Laoshanian				254.14
		Wuchiapingian		Longtanian †							Laibinian				257.7 *
	Guadalupian	Capitanian									Lengwuan		Capitanian		259.51
		Wordian									Kuhfengian		Wordian		264.28
		Roadian									Kuhfengian		Roadian		266.9
	Cisuralian	Kungurian									Luodianian		Leonardian	Cathedralian	273.01
		Kungurian												Hessian	281.9 *
		Artinskian													283.5
					Longlinian		285.4 *
							Wolfcampian	Lenoxian	286.1 *
		Sakmarian						Lenoxian	290.1
		Asselian			Zisongian			Nealian	293.52
Carboniferous	Pennsylvanian	Gzhelian			Zisongian				298.9
		Gzhelian							300.1
		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				Kosovian			443.8
		Katian				Kralodvorian			Bohdalec †	445.2
		Katian				Berounian				449.7 *
		Sandbian								453
										Zahorany †/Vinice	Letna †	456.2 *
									Liben †			458 *
	Middle Ordovician	Darriwilian										458.4
						Dobrotivian						458.5 *
						Oretanian						459.7 *
									Sarka †			461.7 *
		Dapingian							Klabava †			467.3
		Dapingian				Arenigian						468
	Early Ordovician	Floian				Arenigian						470
	Early Ordovician	Tremadocian				Tremadocian						477.7
Cambrian	Furongian	Stage 10										485.4
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian										Series 3 †	497
		Drumian											500.5
		Wuliuan		Stage 5 †									504.5
															509