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
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			Cambrian of China		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			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		Niuchehean					Taoyuanian †					485.4
														486.3 *
														486.5
		Jiangshanian	Jiangshanian	489.5
		Paibian	Paibian	494
		Paibian	Paibian	Waergangian †/Youshuanian					494.9 *
	Miaolingian	Guzhangian	Series 3 †	Guzhangian					Wangcunian †					497
		Drumian		Drumian					Wangcunian †					500.5
		Wuliuan		Stage 5 †					Wuliuan/Taijangian						504.5
	Series 2	Stage 4							Duyunian						509
	Series 2	Stage 3							Nangaoian						514
	Terreneuvian	Stage 2							Meishucunian						521
		Fortunian							Meishucunian						529
		Fortunian							Jinnigian						530.7
																		538.8