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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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			Obsolete Carboniferous Ages of China	Carboniferous of North America	Cretaceous Subepochs	Silurian of England		Permian-Jurassic of New Zealand		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						Senonian									66
		Campanian															72.1
		Santonian															83.6
		Coniacian															86.3
		Turonian															89.8
		Cenomanian															93.9
	Early Cretaceous	Albian						Gallic									100.5
		Aptian															113
		Barremian															121.4
		Hauterivian						Neocomian									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	Vokhmian	247.2
		Olenekian		Nelsonian		249
		Induan		Nelsonian		251.2
		Induan		DUrville		Makarewan	251.5
Permian	Lopingian	Changhsingian				Makarewan	251.902
		Changhsingian				Waiitian	253.2
		Wuchiapingian			Longtanian †	Waiitian	Late Vyatkian/Early Vyatkian		254.14
						Puruhauan			254.2
						Puruhauan			Tatarian	Vyatkian	256.8 *
	Guadalupian	Capitanian			Aparima	Flettian	Severodvinian			Late Severodvinian/Early Severodvinian	259.51
		Wordian				Flettian	Urzhumian			Late Urzhumian/Early Urzhumian	264.28
		Wordian				Barettian	Urzhumian			Late Urzhumian/Early Urzhumian	266
		Roadian					Kazanian		Povolzhian	Late Kazanian/Early Kazanian	266.9
		Roadian					Kazanian		Sokian	Late Kazanian/Early Kazanian	270.7 *
	Cisuralian	Kungurian	Kungurian				Irenian/Ufimian			273.01
						Mangapirian	Irenian/Ufimian			276
							Filipovian			276.5 *
							Saraninian			280.1 *
		Artinskian	Artinskian				Sarginian			283.5
						Telfordian	Sarginian			285
							Irginian			285.9 *
							Burtsevian			287.8 *
							Burtsevian			288.5
		Sakmarian	Sakmarian				Sterlitamakian			290.1
		Sakmarian	Sakmarian				Tastubian			291.7 *
		Asselian	Bursumian †				Asselian			Shikhanian	293.52
								Uskalykian		294.8
								Surenian		297.5
Carboniferous	Pennsylvanian	Gzhelian	Mapingian †				Virgilian				298.9
		Kasimovian	Mapingian †				Missourian				303.7
		Kasimovian					Desmoinesian				305.9 *
		Moscovian					Desmoinesian				307
		Moscovian					Atokan				312.7 *
		Bashkirian					Atokan				315.2
		Bashkirian					Morrowan				318.4 *
	Mississippian	Serpukhovian					Chesterian				323.2
		Visean					Chesterian				330.9
							Meramecian				335.8 *
							Osagean				343.1 *
		Tournaisian					Osagean				346.7
		Tournaisian					Kinderhookian				351.9 *
Devonian	Late Devonian	Famennian									Wocklum/Dasberg/Hemberg/Nehden	358.9
	Late Devonian	Frasnian									Adorf	372.2
	Middle Devonian	Givetian									Givetian	382.7
	Middle Devonian	Eifelian									Eifelian	387.7
	Early Devonian	Emsian									Emsian	393.3
		Pragian									Siegen	407.6
		Lochkovian									Gedinnine	410.8
Silurian	Pridoli										Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine				419.2
	Pridoli										Red Downtonian/Temeside Shales/Downton Castle	Bringewood/Elton				421.3
	Ludlow	Ludfordian									Coalbrookdale	Wenlock (England)/Tickwood				423
		Gorstian														425.6
		Gorstian										Buildwas		426.4 *
	Wenlock	Homerian										Buildwas		427.4
		Homerian									Wych	Woolhope	428.4 *
		Sheinwoodian											430.5
	Llandovery	Telychian											433.4
		Telychian											436.3 *
		Aeronian											438.5
		Aeronian									Cowleigh Park		439.3 *
		Rhuddanian									Cowleigh Park		440.8
Ordovician	Late Ordovician	Hirnantian											443.8
		Katian											445.2
		Sandbian											453
	Middle Ordovician	Darriwilian											458.4
	Middle Ordovician	Dapingian											467.3
	Early Ordovician	Floian											470
	Early Ordovician	Tremadocian											477.7
Cambrian	Furongian	Stage 10											485.4
		Jiangshanian											489.5
		Paibian											494
	Miaolingian	Guzhangian											Series 3 †	497
		Drumian												500.5
		Wuliuan		Stage 5 †										504.5
																	509