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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 Siberia			Cambrian of Kazakhstan	Devonian of France	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					Famennian	358.9
	Late Devonian	Frasnian					Frasnian	372.2
	Middle Devonian	Givetian					Givetian	382.7
	Middle Devonian	Eifelian					Couvinien	387.7
	Early Devonian	Emsian						393.3
		Pragian						407.6
		Pragian					Coblencien	408.2 *
		Lochkovian					Gedinnine	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								Ungurian	Tremadoc				Migneintian	477.7
															Cressagian	480.8 *
				Varangu												481.3 *
				Pakerort	482.2 *
					Mansian †	483.55 *
					Mansian †										485 *
Cambrian	Furongian	Stage 10			Batyrbaian				Tavgian †	Ketyan †/Yurakian					Batyrbaian	Niuchehean	Taoyuanian †	485.4
				486.3 *
								486.5
		Jiangshanian						Jiangshanian								489.5
					Aksaian										Aksaian	490.7 *
					Sakian										Sakian	492.2 *
		Paibian						Paibian								494
										Ensyan †/Maduan/Nganasanian						494.7 *
										Ensyan †/Maduan/Nganasanian						Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian			Series 3 †			Ayusokkanian							Ayusokkanian	Guzhangian	Wangcunian †	497
		Guzhangian						Mayan/Menevian								Guzhangian		499.5
		Drumian													Zhanaarykian	Drumian		500.5
		Drumian													Tuesaian	Drumian		503
		Wuliuan						Stage 5 †							Tuesaian	Amgan/Solvan	Wuliuan/Taijangian		504.5
		Wuliuan						Stage 5 †									Wuliuan/Taijangian		505.3
	Series 2	Stage 4															Duyunian		509
							Toyonian		Lenian †						Toyonian	510 *
							Botomian								Botomian	512.5 *
		Stage 3					Botomian								Botomian	Nangaoian	514
		Stage 3					Atdabanian								Atdabanian	Nangaoian	515.6 *
	Terreneuvian	Stage 2					Tommotian								Tommotian	Meishucunian	521
		Stage 2					Nemakit-Daldynian										525.5
		Fortunian							Manykaian †								529
		Fortunian							Manykaian †							Jinnigian	530.7
																						538.8