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. 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			Devonian of Czechoslovakia	Permian of North America		Permian of the Salt Range	Cambrian of Australia	Devonian of Eastern North America		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														145
		Kimmeridgian														149.2
		Oxfordian														154.8
	Middle Jurassic	Callovian														161.5
		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
													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 *
														Tetraspidoceras		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														201.4
		Norian														208.5
		Carnian														227
	Middle Triassic	Ladinian														237
	Middle Triassic	Anisian														242
	Early Triassic	Olenekian														247.2
		Induan														251.2
		Induan							Kathwai							251.5 *
Permian	Lopingian	Changhsingian							Kathwai							251.902
																252.4 *
									Chhidru							252.9 *
		Wuchiapingian		Longtanian †					Chhidru							254.14
					Kalabagh	255 *
					Wargal	256 *
	Guadalupian	Capitanian				Capitanian	259.51
		Wordian				Wordian	264.28
							265.3 *
					Amb		266.1 *
		Roadian			Amb	Roadian	266.9
		Roadian				Roadian	270.7 *
	Cisuralian	Kungurian				Leonardian	Cathedralian	273.01
		Kungurian					Hessian	281.9 *
		Artinskian					Hessian	283.5
		Artinskian				Wolfcampian	Lenoxian	286.1 *
		Sakmarian					Lenoxian	290.1
		Asselian					Nealian	293.52
Carboniferous	Pennsylvanian	Gzhelian						298.9
		Kasimovian						303.7
		Moscovian						307
		Bashkirian	315.2
	Mississippian	Serpukhovian	323.2
		Visean	330.9
		Tournaisian	346.7
Devonian	Late Devonian	Famennian	Conewangan/Conneautan/Canadaway					Late Famennian	358.9
								Middle Famennian	365.3 *
								Early Famennian	368.5 *
		Frasnian	West Fallsian/Sonyean					Late Frasnian	372.2
								Middle Frasnian	375.4 *
								Early Frasnian	379.3 *
	Middle Devonian	Givetian	Srbsko					Geneseean/Taghanican/Tioughniogan	Cazenovian	Late Givetian	382.7
										Middle Givetian	383.7 *
										Early Givetian	385.9 *
		Eifelian	Chotec					Southwoodian		Late Eifelian	387.7
		Eifelian	Chotec					Southwoodian		Early Eifelian	390.3 *
	Early Devonian	Emsian	Daleje/Zlichovian					Sawkillian/Deer Parkian	Helderbergian	Late Emsian	393.3
		Emsian	Daleje/Zlichovian					Sawkillian/Deer Parkian		Early Emsian	398.3 *
		Pragian	Pragian							Pragian	407.6
		Lochkovian	Lochkovian							Late Lochkovian	410.8
										Middle Lochkovian	412.8 *
										Early Lochkovian	415.6 *
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									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									Datsonian	Niuchehean	Taoyuanian †	485.4
		Stage 10									Payntonian	Niuchehean		486.8 *
		Jiangshanian									Iverian	Jiangshanian		489.5
		Paibian									Idamean	Paibian		494
		Paibian									Idamean	Paibian	Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian									Series 3 †	Mindyallan	Guzhangian	Wangcunian †	497
		Guzhangian										Boomerangian	Guzhangian		499
		Drumian										Undillan	Drumian		500.5
		Drumian										Floran	Drumian		503
		Wuliuan		Stage 5 †								Templetonian	Wuliuan/Taijangian		504.5
		Wuliuan		Stage 5 †								Ordian	Wuliuan/Taijangian		507.8 *
	Series 2	Stage 4										Ordian	Duyunian		509
		Stage 4											Duyunian		510.8 *
		Stage 3											Nangaoian		514
	Terreneuvian	Stage 2											Meishucunian		521
		Fortunian											Meishucunian		529
		Fortunian											Jinnigian		530.7
																538.8