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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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

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 Subepochs	Carboniferous of North America	Central Paratethys Stages	Cretaceous North American Land-Mammal Ages	Permian of the Salt Range
Neogene	Pliocene	Piacenzian	Tertiary †								2.58
	Pliocene	Zanclean									3.6
	Miocene	Messinian									5.333
		Tortonian						Pannonian			7.246
		Serravallian						Sarmatian			11.63
		Serravallian						Badenian			12.8 *
		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				Senonian			Lancian/Edmontonian		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
		Induan									251.2
		Induan								Kathwai	251.5 *
Permian	Lopingian	Changhsingian								Kathwai	251.902
											252.4 *
										Chhidru	252.9 *
		Wuchiapingian		Longtanian †						Chhidru	254.14
										Kalabagh	255 *
										Wargal	256 *
	Guadalupian	Capitanian									259.51
		Wordian									264.28
											265.3 *
										Amb	266.1 *
		Roadian								Amb	266.9
		Roadian									270.7 *
	Cisuralian	Kungurian									273.01
		Artinskian									283.5
		Sakmarian									290.1
		Asselian			Bursumian †		293.52
Carboniferous	Pennsylvanian	Gzhelian			Virgilian		298.9
		Kasimovian			Missourian		303.7
		Kasimovian			Desmoinesian		305.9 *
		Moscovian			Desmoinesian		307
		Moscovian			Atokan		312.7 *
		Bashkirian			Atokan		315.2
		Bashkirian			Morrowan		318.4 *
	Mississippian	Serpukhovian			Chesterian		323.2
		Visean			Chesterian		330.9
					Meramecian		335.8 *
					Osagean		343.1 *
		Tournaisian			Osagean		346.7
		Tournaisian			Kinderhookian		351.9 *
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						443.8
		Katian						445.2
		Sandbian						453
	Middle Ordovician	Darriwilian						458.4
	Middle Ordovician	Dapingian						467.3
	Early Ordovician	Floian						470
	Early Ordovician	Tremadocian						477.7
Cambrian	Furongian	Stage 10						485.4
		Jiangshanian						489.5
		Paibian						494
	Miaolingian	Guzhangian						Series 3 †	497
		Drumian							500.5
		Wuliuan		Stage 5 †					504.5
											509