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
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Cambrian of North America		Permian of North America		Cambrian Epochs	Permian of Western Europe	Central Paratethys Stages	Ordovician of the Baltic
Neogene	Pliocene	Piacenzian	Tertiary †													2.58
	Pliocene	Zanclean														3.6
	Miocene	Messinian														5.333
		Tortonian										Pannonian				7.246
		Serravallian										Sarmatian				11.63
		Serravallian										Badenian				12.8 *
		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														247.2
	Early Triassic	Induan														251.2
Permian	Lopingian	Changhsingian														251.902
	Lopingian	Wuchiapingian		Longtanian †							Zechstein					254.14
	Guadalupian	Capitanian						Capitanian			Rotliegendes					259.51
		Wordian						Wordian								264.28
		Roadian						Roadian								266.9
	Cisuralian	Kungurian						Leonardian	Cathedralian							273.01
		Kungurian							Hessian							281.9 *
		Artinskian							Hessian		Autunian					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				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			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 *
					Kunda	Valaste †/Hunderum	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	Franconian †/Dresbachian/Millardan				Late Cambrian			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 †	Middle Cambrian	497
		Drumian								Marjumian					500.5
		Wuliuan		Stage 5 †						Topazan					504.5
		Wuliuan		Stage 5 †						Delamaran					506.5
	Series 2	Stage 4								Delamaran			Waucoban †	Early Cambrian	509
		Stage 4								Dyeran					511 *
		Stage 3								Dyeran					514
										Montezuman					514.8 *
										Begadean					519.9 *
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																538.8