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 China	Permian-Jurassic of New Zealand		Ordovician of the Baltic				Ammonite Chrons of North America			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															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			Lengwuan	Aparima	Flettian	259.51
		Wordian			Kuhfengian		Flettian	264.28
		Wordian					Barettian	266
		Roadian						266.9
	Cisuralian	Kungurian	Luodianian		273.01
		Kungurian			Mangapirian		276
		Artinskian			Mangapirian		283.5
					Telfordian		285
			Longlinian		Telfordian		285.4 *
							288.5
		Sakmarian					290.1
		Asselian	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