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 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 *
											485 *
Cambrian	Furongian	Stage 10							Batyrbaian	Niuchehean	Taoyuanian †					485.4
																486.3 *
								486.5
		Jiangshanian						Jiangshanian		489.5
									Aksaian	490.7 *
									Sakian	492.2 *
		Paibian						Paibian		494
		Paibian						Paibian		Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian						Series 3 †	Ayusokkanian	Guzhangian	Wangcunian †					497
		Guzhangian								Guzhangian						499.5
		Drumian							Zhanaarykian	Drumian						500.5
		Drumian							Tuesaian	Drumian						503
		Wuliuan							Tuesaian	Stage 5 †	Wuliuan/Taijangian						504.5
		Wuliuan								Stage 5 †	Wuliuan/Taijangian						505.3
	Series 2	Stage 4									Duyunian						509
									Toyonian								510 *
									Botomian								512.5 *
		Stage 3					Nangaoian		Botomian		514
		Stage 3					Nangaoian		Atdabanian		515.6 *
	Terreneuvian	Stage 2					Tommotian		Meishucunian		521
		Stage 2									525.5
		Fortunian									529
		Fortunian							Jinnigian		530.7
																				538.8