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
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
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
J. Meng and M. C. McKenna. 1998. Faunal turnovers of Paleogene mammals from the Mongolian Plateau. Nature 394:364-367 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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-Jurassic of New Zealand		Ordovician of Britain				Devonian of Czechoslovakia	Paleogene Mammal Ages of Asia		Cambrian Epochs	Ordovician of Ibero-Bohemia				Ordovician 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											Tabenbulakian	Hsandagolian							23.03
	Oligocene	Rupelian											Kekeamuan	Hsandagolian							27.82
	Eocene	Priabonian											Houldjinian/Ergilian/Ulangochuian								33.9
		Bartonian											Sharamurunian/Irdinmanhan/Arshantan								37.71
		Lutetian																			41.2
		Ypresian												Bumbanian							47.8
	Paleocene	Thanetian											Gashatan								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																			168.2
		Aalenian																			170.9
	Early Jurassic	Toarcian																			174.7
		Toarcian				Herangi	Ururoan														176
		Pliensbachian					Ururoan														184.2
		Pliensbachian					Aratauran														188.9
		Sinemurian																			192.9
		Hettangian																			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														251.902
		Changhsingian					Waiitian														253.2
		Wuchiapingian		Longtanian †			Waiitian														254.14
		Wuchiapingian		Longtanian †			Puruhauan														254.2
	Guadalupian	Capitanian				Aparima	Flettian														259.51
		Wordian			264.28		Flettian
		Wordian			Barettian		266
		Roadian					266.9
	Cisuralian	Kungurian					273.01
		Kungurian			Mangapirian		276
		Artinskian			Mangapirian		283.5
					Telfordian		285
							288.5
		Sakmarian					290.1
		Asselian					293.52
Carboniferous	Pennsylvanian	Gzhelian					Mapingian †	298.9
		Kasimovian					Mapingian †	303.7
		Kasimovian						305.9
		Moscovian						307
		Bashkirian						315.2
	Mississippian	Serpukhovian						323.2
		Visean						330.9
		Tournaisian	346.7
Devonian	Late Devonian	Famennian	358.9
	Late Devonian	Frasnian	372.2
	Middle Devonian	Givetian	Srbsko					382.7
	Middle Devonian	Eifelian	Chotec					387.7
	Early Devonian	Emsian	Daleje/Zlichovian					393.3
		Pragian	Pragian					407.6
		Lochkovian	Lochkovian					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						Ashgill	Hirnantian	Kosovian	Cincinnatian	Gamachian	443.8
		Katian							Rawtheyan	Kralodvorian		Gamachian	Bohdalec †	445.2
									Rawtheyan			Richmondian		446 *
									Cautleyan					448.9 *
									Pusgillian					449.3 *
								Caradoc	Streffordian					Onnian †	449.6 *
										Berounian					449.7 *
												Maysvillian			Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
												Edenian				450.4 *
											Mohawkian	Chatfieldian				451.1 *
									Cheneyan							451.5 *
									Burrellian							452.7 *
		Sandbian														453
														Actonian †		453.2 *
												Turinian		Actonian †		453.7 *
														Marshbrookian †		Woolstonian †	454.2 *
														Longvillian †			455.2 *
																	Zahorany †/Vinice	Letna †	456.2 *
									Aurelucian										456.8 *
											Whiterockian				Canadian †				Chazyan †/Marmor	457 *
														Soudleyan †/Harnagian/Costonian						457.4 *
													Liben †	Soudleyan †/Harnagian/Costonian						458 *
	Middle Ordovician	Darriwilian						Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn											458.4
										Dobrotivian										458.5 *
										Oretanian										459.7 *
									Abereiddian/Early Llanvirn											461.3 *
													Sarka †							461.7 *
		Dapingian											Klabava †							467.3
										Arenigian										468
								Arenig	Fennian											468.4 *
				Rangerian								469.1 *
	Early Ordovician	Floian		Ibexian							Blackhillsian	Jeffersonian †							Cassinian †	470
									Whitlandian		Blackhillsian									471.1 *
									Whitlandian		Tulean									473.9 *
									Moridunian											474.3 *
		Tremadocian						Tremadoc	Migneintian	Tremadocian										477.7
									Migneintian		Stairsian									480.3 *
									Cressagian		Stairsian									480.8 *
					Skullrockian	Demingian †			Cressagian		482 *
						Demingian †					485 *
Cambrian	Furongian	Stage 10				Late Cambrian													485.4
		Stage 10																	487.5
		Jiangshanian																	489.5
		Paibian					494
	Miaolingian	Guzhangian				Series 3 †	Middle Cambrian												497
		Drumian																	500.5
		Wuliuan																	Stage 5 †	504.5
	Series 2	Stage 4																	Early Cambrian	509
	Series 2	Stage 3																		514
	Terreneuvian	Stage 2																		521
	Terreneuvian	Fortunian																		529
																					538.8