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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
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			Carboniferous of China	Carbo-Permian of the Russian Platform	Cenozoic Subepochs	Cretaceous North American Land-Mammal Ages	Ordovician of North America
Quaternary	Pleistocene	Late Pleistocene						Late Pleistocene								0.0117
		Chibanian						Middle Pleistocene								0.129
		Calabrian						Early Pleistocene								0.774
		Gelasian						Early Pleistocene								1.8
Neogene	Pliocene	Piacenzian	Tertiary †					Late Pliocene								2.58
	Pliocene	Zanclean						Early Pliocene								3.6
	Miocene	Messinian						Late Miocene								5.333
		Tortonian						Late Miocene								7.246
		Serravallian						Middle Miocene								11.63
		Langhian						Middle Miocene								13.82
		Burdigalian						Early Miocene								15.98
		Aquitanian						Early Miocene								20.44
Paleogene	Oligocene	Chattian						Late Oligocene								23.03
	Oligocene	Rupelian						Early Oligocene								27.82
	Eocene	Priabonian						Late Eocene								33.9
		Bartonian						Middle Eocene								37.71
		Lutetian						Middle Eocene								41.2
		Ypresian						Early Eocene								47.8
	Paleocene	Thanetian						Late Paleocene								56
		Selandian						Middle Paleocene								59.2
		Danian						Early Paleocene								61.6
Cretaceous	Late Cretaceous	Maastrichtian							Lancian/Edmontonian							66
		Campanian							Judithian/Aquilan							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					Melekhovian									251.902
	Lopingian	Wuchiapingian		Longtanian †												254.14
	Guadalupian	Capitanian														259.51
		Wordian														264.28
		Wordian					Noginskian									264.9 *
		Roadian														266.9
	Cisuralian	Kungurian														273.01
		Kungurian					Pavlovoposadian									276.8 *
		Artinskian					Pavlovoposadian									283.5
		Artinskian					Rusavkinian									287.6 *
		Sakmarian														290.1
		Asselian														293.52
Carboniferous	Pennsylvanian	Gzhelian														298.9
		Gzhelian			Xiaodushanian	300 *
		Kasimovian				Dorogomilovian	303.7
						Khamovnikian	304.8
					Dalaun	Krevyakinian	305.8 *
		Moscovian				Myachkovian	307
						Podolskian	308.9 *
						Kashirian	311.4 *
						Vereian	313.8
						Melekessian	314.8
		Bashkirian				Melekessian	315.2
						Cheremshanian	316.9 *
					Huashibanian	Cheremshanian	318.5 *
						Prikamian	318.6 *
						Severokeltmian	319.9 *
					Lousuan	Krasnopolyanian	321.2 *
					Lousuan	Voznesenian	321.9 *
	Mississippian	Serpukhovian			Dewunian	Zapaltjubian	323.2
						Protvian	324.4 *
						Steshevian	326.8 *
						Tarusian	329 *
					Shangsian	Tarusian	330.8 *
		Visean	Venevian			330.9
			Mikhailovian			331.9 *
			Aleksinian			333.7 *
			Aleksinian		Jiusian	335 *
			Tulian			335.8 *
			Bobrikian			339.9 *
			Radaevkian			343.4 *
		Tournaisian	Tangbagouan		Kosvian	346.7
					Kizelian	350.7 *
					Cherepetian	351.9 *
					Karakubian	354.4 *
					Upinian	356.3 *
					Malevkian	357.6 *
					Gumerovian	358 *
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					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							477.7
						Stairsian							480.3 *
						Skullrockian						Demingian †	482 *
Cambrian	Furongian	Stage 10				Skullrockian							485.4
		Stage 10											487.5
		Jiangshanian											489.5
		Paibian											494
	Miaolingian	Guzhangian											Series 3 †	497
		Drumian												500.5
		Wuliuan												Stage 5 †	504.5
																509