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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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			Ordovician of North America					Cambrian of West Avalonia	Ordovician of the Baltic				Permian of North America		Silurian of England		Cambrian Epochs	Carboniferous Subepochs	Permian of Western Europe	Cretaceous Subepochs
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																						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																			Late Pennsylvanian			298.9
		Kasimovian																			Late Pennsylvanian			303.7
		Moscovian																			Middle Pennsylvanian			307
		Bashkirian																			Early Pennsylvanian			315.2
	Mississippian	Serpukhovian																			Late Mississippian			323.2
		Visean																			Middle Mississippian			330.9
		Tournaisian			Early Mississippian	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					Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	419.2
	Pridoli					Red Downtonian/Temeside Shales/Downton Castle	Bringewood/Elton	421.3
	Ludlow	Ludfordian				Coalbrookdale	Wenlock (England)/Tickwood	423
		Gorstian						425.6
		Gorstian					Buildwas	426.4 *
	Wenlock	Homerian					Buildwas	427.4
		Homerian				Wych	Woolhope	428.4 *
		Sheinwoodian						430.5
	Llandovery	Telychian						433.4
		Telychian					436.3 *
		Aeronian					438.5
		Aeronian				Cowleigh Park	439.3 *
		Rhuddanian				Cowleigh Park	440.8
Ordovician	Late Ordovician	Hirnantian				Cincinnatian	Gamachian	Harju	Porkuni	Ashgill	Hirnantian	443.8
		Katian					Gamachian		Pirgu		Rawtheyan	445.2
							Richmondian				Rawtheyan	446 *
											Cautleyan	448.9 *
											Pusgillian	449.3 *
									Vormsi	Caradoc	Streffordian	Onnian †	449.6 *
							Maysvillian		Vormsi				Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
							Maysvillian		Nabala					Johvi †	450 *
							Edenian		Nabala						450.4 *
							Edenian	Viru	Rakvere						450.6 *
						Mohawkian	Chatfieldian								451.1 *
											Cheneyan				451.5 *
									Oandu		Cheneyan				452 *
									Oandu		Burrellian				452.7 *
		Sandbian							Keila					Idavere †	453
												Actonian †			453.2 *
							Turinian								453.7 *
									Haljala						453.9
												Marshbrookian †			Woolstonian †			454.2 *
												Longvillian †						455.2 *
									Kukruse									456.4 *
											Aurelucian							456.8 *
						Whiterockian							Canadian †					Chazyan †/Marmor	457 *
												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 *
				Abereiddian/Early Llanvirn					Aseri		461.3 *
								Oeland	Kunda		462.9 *
									Kunda		Valaste †/Hunderum			464.3 *
									Volkhov					Langevoja †/Vaana/Saka					467.1 *
		Dapingian																	467.3
				Arenig						Fennian									468.4 *
							Rangerian												469.1 *
							Rangerian		Billingen										469.3 *
	Early Ordovician	Floian				Ibexian	Blackhillsian											Jeffersonian †	Cassinian †	470
											Latorp †					470.1 *
										Whitlandian						471.1 *
									Hunneberg							473.7 *
							Tulean									473.9 *
										Moridunian						474.3 *
		Tremadocian		Tremadoc						Migneintian						477.7
							Stairsian			Migneintian						480.3 *
					Cressagian					480.8 *
									Varangu	481.3 *
							Skullrockian		Varangu	Demingian †						482 *
									Pakerort							482.2 *
																485 *
Cambrian	Furongian	Stage 10															Late Cambrian	485.4
																		486.3 *
																		486.5
																		487.5
		Jiangshanian																489.5
		Paibian																494
	Miaolingian	Guzhangian															Series 3 †	Middle Cambrian	497
		Guzhangian																	Arcadian	498.4
		Drumian																		500.5
		Wuliuan																		Stage 5 †	504.5
	Series 2	Stage 4																	Branchian	Early Cambrian	509
		Stage 3	514																Branchian
		Stage 3	Placentian																517.1
	Terreneuvian	Stage 2																	521
	Terreneuvian	Fortunian																	529
																								538.8