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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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			Silurian of the Baltic	Devonian of Germany	Permian Subages of Germany	Permo-Triassic Subages of Eastern Europe	Ordovician of the Baltic			Silurian of North America			Silurian Ages of Europe	Cretaceous Subepochs	Ordovician of Britain
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															Senonian		66
		Campanian																	72.1
		Santonian																	83.6
		Coniacian																	86.3
		Turonian																	89.8
		Cenomanian																	93.9
	Early Cretaceous	Albian															Gallic		100.5
		Aptian																	113
		Barremian																	121.4
		Hauterivian															Neocomian		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						Buntsandstein											251.902
	Lopingian	Wuchiapingian		Longtanian †				Buntsandstein	Late Vyatkian/Early Vyatkian										254.14
	Guadalupian	Capitanian						Ohre/Aller	Late Severodvinian/Early Severodvinian										259.51
		Wordian						Leine	Late Urzhumian/Early Urzhumian										264.28
		Roadian							Late Kazanian/Early Kazanian										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					Wocklum/Dasberg/Hemberg/Nehden												358.9
	Late Devonian	Frasnian			Adorf	372.2
	Middle Devonian	Givetian			Givetian	382.7
	Middle Devonian	Eifelian			Eifelian	387.7
	Early Devonian	Emsian			Emsian	393.3
		Pragian			Siegen	407.6
		Lochkovian			Gedinnine	410.8
Silurian	Pridoli				Ohesaare		Cayugan			419.2
					Kaugetuma		Cayugan			421.7 *
					Kaugetuma		Niagaran			422.5 *
	Ludlow	Ludfordian			Kuressaare					423
		Ludfordian			Paadla					423.4 *
		Gorstian			Paadla					425.6
	Wenlock	Homerian			Rootsikula					Lockportian	Gleedonian	427.4
					Jaagarahu						Gleedonian	429.2 *
											Whitwellian	429.7 *
		Sheinwoodian										430.5
		Sheinwoodian			Jaani							431.8 *
	Llandovery	Telychian	Ontarian		Jaani					433.4
		Telychian			Adavere					434 *
		Aeronian								438.5
										Alexandrian		438.7 *
					Raikkula							439.4 *
			Medinan				Clinton					440.1 *
												440.7 *
		Rhuddanian										440.8
		Rhuddanian			Juuru							441.4 *
Ordovician	Late Ordovician	Hirnantian			Harju					Porkuni			Ashgill	Hirnantian	443.8
		Katian								Pirgu				Rawtheyan	445.2
														Cautleyan	448.9 *
														Pusgillian	449.3 *
										Vormsi			Caradoc	Streffordian	Onnian †	449.6 *
										Nabala						Johvi †	450 *
					Viru					Rakvere							450.6 *
										Rakvere				Cheneyan			451.5 *
										Oandu				Cheneyan			452 *
										Oandu				Burrellian			452.7 *
		Sandbian								Keila						Idavere †	453
										Keila					Actonian †		453.2 *
										Haljala					Actonian †		453.9
															Marshbrookian †		Woolstonian †	454.2 *
															Longvillian †			455.2 *
										Kukruse								456.4 *
														Aurelucian				456.8 *
															Soudleyan †/Harnagian/Costonian			457.4 *
										Uhaku					Soudleyan †/Harnagian/Costonian	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian								Uhaku			Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				458.4
										Lasnamagi								458.9 *
										Aseri								460.4 *
										Aseri				Abereiddian/Early Llanvirn				461.3 *
				Oeland	Kunda					462.9 *
					Kunda					Valaste †/Hunderum						464.3 *
					Volkhov			Langevoja †/Vaana/Saka								467.1 *
		Dapingian							467.3
									Arenig				Fennian	468.4 *
					Billingen									469.3 *
	Early Ordovician	Floian												470
								Latorp †						470.1 *
													Whitlandian	471.1 *
					Hunneberg								Whitlandian	473.7 *
													Moridunian	474.3 *
		Tremadocian							Tremadoc				Migneintian	477.7
													Cressagian	480.8 *
					Varangu									481.3 *
					Pakerort									482.2 *
														485 *
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