PBDB Timescale

International Chronostratigraphic Timescale

The interval definitions in this timescale are derived from the following sources:

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
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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) view

There are 59 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 126764 collections

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International Chronostratigraphic Timescale			Permian of North America		Cambrian of North America		European Faunal Zones	Devonian Subages	Permian of the Russian Platform
Quaternary	Pleistocene	Gelasian					MN 17				1.8
Neogene	Pliocene	Piacenzian					MN 16				2.58
		Piacenzian					MN 15				3.2
		Zanclean					MN 15				3.6
							MN 14				4.2
							MN 13				4.9
	Miocene	Messinian					MN 13				5.333
		Tortonian					MN 12				7.246
							MN 11				7.75
							MN 10				8.7
							MN 9				9.7
							MN 7 + 8				11.1
		Serravallian					MN 7 + 8				11.63
		Serravallian					MN 6				12.8 *
		Langhian					MN 5				13.82
		Burdigalian					MN 4				15.98
							MN 3				16.9
							MN 2				20
		Aquitanian					MN 2				20.44
		Aquitanian					MN 1				22.4
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									247.2
	Early Triassic	Induan									251.2
Permian	Lopingian	Changhsingian									251.902
		Wuchiapingian									254.14
		Wuchiapingian							Tatarian	Vyatkian	256.8 *
	Guadalupian	Capitanian	Capitanian							Severodvinian	259.51
		Wordian	Wordian							Urzhumian	264.28
		Roadian	Roadian	Kazanian	Povolzhian	266.9
		Roadian	Roadian	Kazanian	Sokian	270.7 *
	Cisuralian	Kungurian	Leonardian	Cathedralian	Kungurian	Irenian/Ufimian		273.01
						Filipovian		276.5 *
						Saraninian		280.1 *
				Hessian		Saraninian		281.9 *
		Artinskian			Artinskian	Sarginian		283.5
						Irginian		285.9 *
			Wolfcampian	Lenoxian		Irginian		286.1 *
						Burtsevian		287.8 *
		Sakmarian			Sakmarian	Sterlitamakian		290.1
		Sakmarian			Sakmarian	Tastubian		291.7 *
		Asselian		Nealian	Asselian	Shikhanian		293.52
						Uskalykian		294.8
						Surenian		297.5
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					Late Famennian	358.9
							Middle Famennian	365.3 *
							Early Famennian	368.5 *
		Frasnian					Late Frasnian	372.2
							Middle Frasnian	375.4 *
							Early Frasnian	379.3 *
	Middle Devonian	Givetian					Late Givetian	382.7
							Middle Givetian	383.7 *
							Early Givetian	385.9 *
		Eifelian					Late Eifelian	387.7
		Eifelian					Early Eifelian	390.3 *
	Early Devonian	Emsian					Late Emsian	393.3
		Emsian					Early Emsian	398.3 *
		Pragian					Pragian	407.6
		Lochkovian					Late Lochkovian	410.8
							Middle Lochkovian	412.8 *
							Early Lochkovian	415.6 *
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						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						Franconian †/Dresbachian/Millardan	485.4
		Stage 10							Sunwaptan	487.5
		Jiangshanian							Sunwaptan	489.5
		Jiangshanian							Steptoean	493 *
		Paibian							Steptoean	494
	Miaolingian	Guzhangian						Marjumian	Albertian †	497
		Drumian						Marjumian		500.5
		Wuliuan						Topazan		504.5
		Wuliuan						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