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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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 Britain		Silurian of North America			Carboniferous of China	Cambrian Epochs	Cambrian of Australia	Central Paratethys Stages	Permo-Triassic Subages of Eastern Europe	Obsolete Carboniferous Ages of China
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															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															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													Vokhmian		247.2
	Early Triassic	Induan													Vokhmian		251.2
Permian	Lopingian	Changhsingian															251.902
	Lopingian	Wuchiapingian		Longtanian †											Late Vyatkian/Early Vyatkian		254.14
	Guadalupian	Capitanian													Late Severodvinian/Early Severodvinian		259.51
		Wordian													Late Urzhumian/Early Urzhumian		264.28
		Roadian													Late Kazanian/Early Kazanian		266.9
	Cisuralian	Kungurian															273.01
		Artinskian															283.5
		Sakmarian															290.1
		Asselian															293.52
Carboniferous	Pennsylvanian	Gzhelian														Mapingian †	298.9
		Gzhelian									Xiaodushanian						300 *
		Kasimovian									Xiaodushanian						303.7
											Dalaun						305.8 *
																	305.9
		Moscovian															307
		Bashkirian															315.2
					Huashibanian	318.5 *
					Lousuan	321.2 *
	Mississippian	Serpukhovian			Dewunian	323.2
		Serpukhovian			Shangsian	330.8 *
		Visean			Shangsian	330.9
		Visean			Jiusian	335 *
		Tournaisian			Tangbagouan	346.7
Devonian	Late Devonian	Famennian				Famennian	358.9
	Late Devonian	Frasnian				Frasnian	372.2
	Middle Devonian	Givetian				Givetian	382.7
	Middle Devonian	Eifelian				Couvinien	387.7
	Early Devonian	Emsian					393.3
		Pragian					407.6
		Pragian				Coblencien	408.2 *
		Lochkovian				Gedinnine	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							Merioneth	Dolgellian/Trempealeauan	Late Cambrian	Datsonian	485.4
										Dolgellian/Trempealeauan		Payntonian	486.8 *
										Festiniogian		Payntonian	489.2 *
		Jiangshanian								Festiniogian		Iverian	489.5
		Jiangshanian								Maentwrogian		Iverian	493.1 *
		Paibian								Maentwrogian		Idamean	494
	Miaolingian	Guzhangian							Series 3 †	St Davids		Middle Cambrian	Mindyallan	497
		Guzhangian											Boomerangian	499
		Drumian											Undillan	500.5
		Drumian											Floran	503
		Wuliuan		Stage 5 †									Templetonian	504.5
		Wuliuan		Stage 5 †									Ordian	507.8 *
	Series 2	Stage 4								Caerfai		Early Cambrian	Ordian	509
		Stage 4												510.8 *
		Stage 3												514
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
																	538.8