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
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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			Permian of North America		Ammonite Chrons of North America			Silurian of the Baltic	Permian of the Salt Range	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						Epizigzagiceras							168.2
		Bajocian						Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense							168.4
		Aalenian						Howelli/Scissum/Westermanni							170.9
	Early Jurassic	Toarcian						Yakounensis/Hillebrandti/Crassicosta							174.7
								Planulata							179.3 *
								Planulata		Arnioceras arnouldi					179.8 *
								Kanense							181.3 *
								Carlottense							182.3 *
								Kunae							183.5 *
		Pliensbachian						Kunae							184.2
								Freboldi							185.1 *
								Whiteavesi/Imlayi	Tetraspidoceras						186.2 *
									Tetraspidoceras						189.2 *
								Plesechioceras harbledownense/Asteroceras varians/Coroniceras	Canadensis						190.3 *
		Sinemurian													192.9
								Pseudaetomoceras		Psiloceras					196.4 *
								Franziceras/Euphyllites							196.5 *
		Hettangian						Franziceras/Euphyllites							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
		Induan													251.2
		Induan										Kathwai			251.5 *
Permian	Lopingian	Changhsingian										Kathwai			251.902
															252.4 *
												Chhidru			252.9 *
		Wuchiapingian		Longtanian †								Chhidru			254.14
					Kalabagh	255 *
					Wargal	256 *
	Guadalupian	Capitanian				Capitanian	259.51
		Wordian				Wordian	264.28
							265.3 *
					Amb		266.1 *
		Roadian			Amb	Roadian	266.9
		Roadian				Roadian	270.7 *
	Cisuralian	Kungurian				Leonardian	Cathedralian				273.01
		Kungurian					Hessian				281.9 *
		Artinskian					Hessian				283.5
		Artinskian				Wolfcampian	Lenoxian				286.1 *
		Sakmarian					Lenoxian				290.1
		Asselian					Nealian				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	382.7
	Middle Devonian	Eifelian	387.7
	Early Devonian	Emsian	393.3
		Pragian	407.6
		Lochkovian	410.8
Silurian	Pridoli		Ohesaare								419.2
	Pridoli		Kaugetuma								421.7 *
	Ludlow	Ludfordian	Kuressaare								423
		Ludfordian	Paadla								423.4 *
		Gorstian	Paadla								425.6
	Wenlock	Homerian	Rootsikula								427.4
		Homerian	Jaagarahu								429.2 *
		Sheinwoodian	Jaagarahu								430.5
		Sheinwoodian	Jaani								431.8 *
	Llandovery	Telychian	Jaani								433.4
		Telychian	Adavere								434 *
		Aeronian	Adavere								438.5
		Aeronian	Raikkula								439.4 *
		Rhuddanian	Raikkula								440.8
		Rhuddanian	Juuru								441.4 *
Ordovician	Late Ordovician	Hirnantian									Harju	Porkuni	443.8
		Katian										Pirgu	445.2
												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		458.4
								Lasnamagi		458.9 *
								Aseri		460.4 *
								Oeland		Kunda	462.9 *
									Valaste †/Hunderum	Kunda	464.3 *
										Volkhov	Langevoja †/Vaana/Saka	467.1 *
		Dapingian								Volkhov		467.3
		Dapingian								Billingen		469.3 *
	Early Ordovician	Floian										470
									Latorp †			470.1 *
										Hunneberg		473.7 *
		Tremadocian								Hunneberg		477.7
										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