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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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

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			Permian Subages of Germany	Carboniferous of Western Europe		Devonian of Czechoslovakia	Ordovician of North America						Cambrian of Siberia			Cambrian 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																		168.2
		Aalenian																		170.9
	Early Jurassic	Toarcian																		174.7
		Pliensbachian																		184.2
		Sinemurian																		192.9
		Hettangian																		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
	Early Triassic	Induan																		251.2
Permian	Lopingian	Changhsingian				Buntsandstein														251.902
	Lopingian	Wuchiapingian		Longtanian †		Buntsandstein														254.14
	Guadalupian	Capitanian				Ohre/Aller														259.51
		Wordian				Leine														264.28
		Roadian																		266.9
	Cisuralian	Kungurian																		273.01
		Artinskian																		283.5
		Sakmarian																		290.1
		Asselian																		293.52
		Asselian					Kuzel													297.7
Carboniferous	Pennsylvanian	Gzhelian					Kuzel													298.9
							Stephanian	Stephanian C												300.3 *
								Stephanian B												300.9 *
								Stephanian A												301.4 *
		Kasimovian						Stephanian A												303.7
		Kasimovian						Cantabrian												305 *
		Moscovian						Cantabrian												307
					Westphalian		Westphalian D	307.4 *
							Westphalian C	309.8
							Westphalian B	314.6
		Bashkirian					Westphalian B	315.2
							Westphalian A	317 *
					Namurian		Yeadonian	318.8 *
							Marsdenian	320.2 *
							Kinderscoutian	321.5 *
							Alportian	322 *
							Chokierian	323.1 *
	Mississippian	Serpukhovian					Chokierian	323.2
							Arnsbergian	324 *
							Pendleian	327.4 *
		Visean			Warnantian		Brigantian †	330.9
					Livian		Asbian †	336.3 *
					Moliniacian		Holkerian †/Arundian/Chadian	340.2 *
		Tournaisian			Ivorian			346.7
		Tournaisian	Hastarian		353.7 *
Devonian	Late Devonian	Famennian			Late Famennian			358.9
					Middle Famennian			365.3 *
					Early Famennian			368.5 *
		Frasnian			Late Frasnian			372.2
					Middle Frasnian			375.4 *
					Early Frasnian			379.3 *
	Middle Devonian	Givetian			Srbsko			Late Givetian	382.7
								Middle Givetian	383.7 *
								Early Givetian	385.9 *
		Eifelian			Chotec			Late Eifelian	387.7
		Eifelian			Chotec			Early Eifelian	390.3 *
	Early Devonian	Emsian			Daleje/Zlichovian			Late Emsian	393.3
		Emsian			Daleje/Zlichovian			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							Cincinnatian	Gamachian	443.8
		Katian								Gamachian	445.2
										Richmondian	446 *
										Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
										Edenian		450.4 *
									Mohawkian	Chatfieldian		451.1 *
		Sandbian		453						Chatfieldian
				Turinian						453.7 *
				Whiterockian					Canadian †	Chazyan †/Marmor	457 *
	Middle Ordovician	Darriwilian									458.4
		Dapingian									467.3
		Dapingian				Rangerian					469.1 *
	Early Ordovician	Floian		Ibexian		Blackhillsian				Jeffersonian †	Cassinian †	470
		Floian				Tulean						473.9 *
		Tremadocian				Tulean						477.7
						Stairsian						480.3 *
						Skullrockian					Demingian †	482 *
											Demingian †	Mansian †	483.55 *
Cambrian	Furongian	Stage 10										Batyrbaian	Tavgian †	Ketyan †/Yurakian	Franconian †/Dresbachian/Millardan	485.4
		Stage 10														Sunwaptan	487.5
		Jiangshanian															489.5
												Aksaian					490.7 *
												Sakian					492.2 *
																Steptoean	493 *
		Paibian															494
		Paibian												Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian										Series 3 †	Ayusokkanian			Marjumian	Albertian †	497
		Guzhangian											Mayan/Menevian					499.5
		Drumian											Mayan/Menevian					500.5
		Wuliuan											Stage 5 †			Amgan/Solvan		Topazan	504.5
		Wuliuan											Stage 5 †					Delamaran	506.5
	Series 2	Stage 4															Waucoban †		509
														Toyonian		Lenian †			510 *
														Toyonian				Dyeran	511 *
														Botomian					512.5 *
		Stage 3																	514
																		Montezuman	514.8 *
							Atdabanian									515.6 *		Montezuman
							Atdabanian									Begadean		519.9 *
	Terreneuvian	Stage 2	Tommotian				521
		Stage 2	Nemakit-Daldynian				525.5
		Fortunian	Nemakit-Daldynian				Manykaian †							529
																				538.8