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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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			Devonian of France	Ordovician of China			Carbo-Permian of the Russian Platform	Permo-Triassic Subages of Eastern Europe	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													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									Vokhmian				247.2
	Early Triassic	Induan									Vokhmian				251.2
Permian	Lopingian	Changhsingian								Melekhovian					251.902
	Lopingian	Wuchiapingian		Longtanian †							Late Vyatkian/Early Vyatkian				254.14
	Guadalupian	Capitanian									Late Severodvinian/Early Severodvinian				259.51
		Wordian									Late Urzhumian/Early Urzhumian				264.28
		Wordian								Noginskian	Late Urzhumian/Early Urzhumian				264.9 *
		Roadian									Late Kazanian/Early Kazanian				266.9
	Cisuralian	Kungurian													273.01
		Kungurian								Pavlovoposadian					276.8 *
		Artinskian								Pavlovoposadian					283.5
		Artinskian								Rusavkinian					287.6 *
		Sakmarian													290.1
		Asselian													293.52
Carboniferous	Pennsylvanian	Gzhelian													298.9
		Kasimovian								Dorogomilovian					303.7
										Khamovnikian					304.8
										Krevyakinian					305.8 *
		Moscovian								Myachkovian					307
					Podolskian	308.9 *
					Kashirian	311.4 *
					Vereian	313.8
					Melekessian	314.8
		Bashkirian			Melekessian	315.2
					Cheremshanian	316.9 *
					Prikamian	318.6 *
					Severokeltmian	319.9 *
					Krasnopolyanian	321.2 *
					Voznesenian	321.9 *
	Mississippian	Serpukhovian			Zapaltjubian	323.2
					Protvian	324.4 *
					Steshevian	326.8 *
					Tarusian	329 *
		Visean			Venevian	330.9
					Mikhailovian	331.9 *
					Aleksinian	333.7 *
			Tulian		335.8 *
			Bobrikian		339.9 *
			Radaevkian		343.4 *
		Tournaisian	Kosvian		346.7
			Kizelian		350.7 *
			Cherepetian		351.9 *
			Karakubian		354.4 *
			Upinian		356.3 *
			Malevkian		357.6 *
			Gumerovian		358 *
Devonian	Late Devonian	Famennian	Famennian			358.9
	Late Devonian	Frasnian	Frasnian			372.2
	Middle Devonian	Givetian	Givetian			382.7
	Middle Devonian	Eifelian	Couvinien			387.7
	Early Devonian	Emsian				393.3
		Pragian				407.6
		Pragian	Coblencien			408.2 *
		Lochkovian	Gedinnine			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				Hirnantian	Xiaoxita †/Shikou	Wufeng †	Harju	Porkuni		443.8
		Katian				Chientangkiangian		Wufeng †		Pirgu		445.2
						Neichianshanian/Hanjiang				Pirgu		449.5
										Vormsi		449.6 *
										Nabala		Johvi †	450 *
									Viru	Rakvere			450.6 *
				Oandu						452 *
		Sandbian		Keila						Idavere †		453
				Haljala								453.9
				Kukruse								456.4 *
				Uhaku						Aluoja †	457.5 *
	Middle Ordovician	Darriwilian		Uhaku		Darriwilian	Guniu †/Hulo				458.4
				Lasnamagi							458.9 *
				Aseri							460.4 *
				Oeland					Kunda		462.9 *
										Valaste †/Hunderum	464.3 *
							Hunjiang †	Dawan †/Daobaowan/Ningkuo			466.3 *
									Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian				Dapingian			Volkhov			467.3
		Dapingian				Dapingian			Billingen			469.3 *
	Early Ordovician	Floian				Yiyangian						470
										Latorp †		470.1 *
									Hunneberg			473.7 *
		Tremadocian				Xinchangian						477.7
								Lianghekou †				477.9 *
									Varangu			481.3 *
									Pakerort			482.2 *
Cambrian	Furongian	Stage 10							Pakerort			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