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. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

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		Permian of China	Permian-Jurassic of New Zealand		Ordovician of the Baltic				Ammonite Chrons of North America
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							Oteke	Puaroan								145
		Kimmeridgian							Oteke	Puaroan								149.2
									Kawhia	Ohauan								150
										Heterian								154.5
		Oxfordian																154.8
	Middle Jurassic	Callovian																161.5
		Callovian								Temaikan								164.3
		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
									Herangi	Ururoan					Yakounensis/Hillebrandti/Crassicosta			176
															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 *
										Aratauran					Whiteavesi/Imlayi			188.9
																		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							Balfour	Otapirian								201.4
		Norian								Warepan								208.5
										Otamitan								217
										Oretian								221
		Carnian								Oretian								227
		Carnian							Gore	Kaihikuan								227.5
	Middle Triassic	Ladinian								Kaihikuan								237
		Ladinian		Etalian	238
		Anisian		Etalian	242
		Anisian		Malakovian	246
	Early Triassic	Olenekian		Malakovian	247.2
		Olenekian		Nelsonian	249
		Induan		Nelsonian	251.2
		Induan		DUrville	Makarewan	251.5
Permian	Lopingian	Changhsingian			Makarewan	Meishanian	251.902
					Waiitian	Meishanian	253.2
						Baoqingian	253.4 *
		Wuchiapingian				Longtanian †	Laoshanian	254.14
					Puruhauan		Laoshanian	254.2
					Puruhauan		Laibinian	257.7 *
	Guadalupian	Capitanian			Capitanian	Lengwuan	Aparima	Flettian	259.51
		Wordian			Wordian	Kuhfengian		Flettian	264.28
		Wordian			Wordian			Barettian	266
		Roadian			Roadian				266.9
	Cisuralian	Kungurian	Leonardian		Cathedralian	Luodianian			273.01
					Cathedralian			Mangapirian	276
					Hessian				281.9 *
		Artinskian							283.5
								Telfordian	285
						Longlinian			285.4 *
			Wolfcampian		Lenoxian				286.1 *
									288.5
		Sakmarian							290.1
		Asselian			Nealian	Zisongian			293.52
Carboniferous	Pennsylvanian	Gzhelian				Zisongian			298.9
		Gzhelian							300.1
		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	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