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
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			Ordovician of North America					Cambrian of Kazakhstan	Carboniferous of Western Europe		Silurian of North America			Devonian of Germany	Cambrian of Britain	Permian of China
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																	Meishanian	251.902
		Changhsingian																	Baoqingian	253.4 *
		Wuchiapingian		Longtanian †															Laoshanian	254.14
		Wuchiapingian		Longtanian †															Laibinian	257.7 *
	Guadalupian	Capitanian																	Lengwuan	259.51
		Wordian																	Kuhfengian	264.28
		Roadian																	Kuhfengian	266.9
	Cisuralian	Kungurian																	Luodianian	273.01
		Artinskian																	Luodianian	283.5
		Artinskian																	Longlinian	285.4 *
		Sakmarian																	Longlinian	290.1
		Asselian																	Zisongian	293.52
		Asselian										Kuzel								297.7
Carboniferous	Pennsylvanian	Gzhelian																		298.9
																				300.1
												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				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					Cayugan		419.2
	Pridoli					Niagaran		422.5 *
	Ludlow	Ludfordian						423
	Ludlow	Gorstian						425.6
	Wenlock	Homerian						Lockportian	427.4
	Wenlock	Sheinwoodian							430.5
	Llandovery	Telychian						Ontarian	433.4
		Aeronian							438.5
									Alexandrian	438.7 *
						Medinan		Clinton		440.1 *
										440.7 *
		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							Chatfieldian			453
									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							Ungurian	477.7
						Stairsian								480.3 *
						Skullrockian						Demingian †		482 *
Cambrian	Furongian	Stage 10				Skullrockian							Batyrbaian	Merioneth	Dolgellian/Trempealeauan	485.4
															Dolgellian/Trempealeauan	487.5
															Festiniogian	489.2 *
		Jiangshanian														489.5
													Aksaian			490.7 *
													Sakian			492.2 *
															Maentwrogian	493.1 *
		Paibian													Maentwrogian	494
	Miaolingian	Guzhangian											Series 3 †	Ayusokkanian	St Davids		497
		Guzhangian															499.5
		Drumian												Zhanaarykian			500.5
		Drumian												Tuesaian			503
		Wuliuan												Tuesaian			Stage 5 †	504.5
		Wuliuan															Stage 5 †	505.3
	Series 2	Stage 4															Caerfai	509
														Toyonian				510 *
														Botomian				512.5 *
		Stage 3												Botomian				514
		Stage 3												Atdabanian				515.6 *
	Terreneuvian	Stage 2												Tommotian				521
		Stage 2																525.5
		Fortunian																529
																				538.8