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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 view
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Cambrian of Australia	Cretaceous North American Land-Mammal Ages	Neogene Mammal Ages of China	Cambrian of North America		Permian of Western Europe	Cretaceous Subepochs	Ordovician of Britain
Quaternary	Holocene	Meghalayan												0
		Northgrippian												0.0042
		Greenlandian												0.0082
	Pleistocene	Late Pleistocene						Nihewanian						0.0117
		Chibanian												0.129
		Calabrian												0.774
		Gelasian												1.8
Neogene	Pliocene	Piacenzian	Tertiary †					Yushean						2.58
		Zanclean						Yushean						3.6
		Zanclean						Baodean						4.9
	Miocene	Messinian												5.333
		Tortonian												7.246
		Tortonian						Tunggurian						11.1
		Serravallian						Tunggurian						11.63
		Langhian						Shanwangian						13.82
		Burdigalian						Shanwangian						15.98
		Burdigalian						Xiejiaan						16.9
		Aquitanian						Xiejiaan						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					Lancian/Edmontonian					Senonian		66
		Campanian					Judithian/Aquilan							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												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												251.902
	Lopingian	Wuchiapingian		Longtanian †							Zechstein			254.14
	Guadalupian	Capitanian									Rotliegendes			259.51
		Wordian												264.28
		Roadian												266.9
	Cisuralian	Kungurian												273.01
		Artinskian									Autunian			283.5
		Sakmarian			290.1
		Asselian			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				358.9
	Late Devonian	Frasnian				372.2
	Middle Devonian	Givetian				382.7
	Middle Devonian	Eifelian				387.7
	Early Devonian	Emsian				393.3
		Pragian				407.6
		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	443.8
		Katian						Rawtheyan	445.2
								Cautleyan	448.9 *
			Pusgillian					449.3 *
			Caradoc			Streffordian		Onnian †	449.6 *
						Cheneyan	451.5 *
						Burrellian	452.7 *
		Sandbian					453
							Actonian †	453.2 *
							Marshbrookian †	Woolstonian †	454.2 *
							Longvillian †		455.2 *
						Aurelucian	Longvillian †		456.8 *
						Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian	Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian				Abereiddian/Early Llanvirn			461.3 *
		Dapingian				Abereiddian/Early Llanvirn			467.3
		Dapingian	Arenig			Fennian			468.4 *
	Early Ordovician	Floian				Fennian			470
						Whitlandian			471.1 *
						Moridunian			474.3 *
		Tremadocian	Tremadoc			Migneintian			477.7
			Tremadoc			Cressagian			480.8 *
									485 *
Cambrian	Furongian	Stage 10							Datsonian	Franconian †/Dresbachian/Millardan	485.4
									Payntonian		486.8 *
									Payntonian		Sunwaptan	487.5
		Jiangshanian							Iverian		Sunwaptan	489.5
		Jiangshanian							Iverian		Steptoean	493 *
		Paibian							Idamean		Steptoean	494
	Miaolingian	Guzhangian							Series 3 †	Mindyallan	Marjumian	Albertian †	497
		Guzhangian								Boomerangian			499
		Drumian								Undillan			500.5
		Drumian								Floran			503
		Wuliuan		Stage 5 †						Templetonian	Topazan		504.5
										Templetonian	Delamaran		506.5
										Ordian			507.8 *
	Series 2	Stage 4								Ordian		Waucoban †	509
													510.8 *
											Dyeran		511 *
		Stage 3									Dyeran		514
											Montezuman		514.8 *
											Begadean		519.9 *
	Terreneuvian	Stage 2			521
	Terreneuvian	Fortunian			529
														538.8