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. 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, 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
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			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							Franconian †/Dresbachian/Millardan	485.4
		Stage 10								Sunwaptan	487.5
		Jiangshanian								Sunwaptan	489.5
		Jiangshanian								Steptoean	493 *
		Paibian								Steptoean	494
	Miaolingian	Guzhangian							Series 3 †	Marjumian	Albertian †	497
		Drumian								Marjumian		500.5
		Wuliuan		Stage 5 †						Topazan		504.5
		Wuliuan		Stage 5 †						Delamaran		506.5
	Series 2	Stage 4								Delamaran	Waucoban †	509
		Stage 4								Dyeran		511 *
		Stage 3								Dyeran		514
										Montezuman		514.8 *
										Begadean		519.9 *
	Terreneuvian	Stage 2										521
	Terreneuvian	Fortunian										529
													538.8