PBDB Interval

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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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 126691 collections

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International Chronostratigraphic Timescale			Ordovician of Australia	Carbo-Permian of the Russian Platform	Ten Million Year Bins	Cambrian Epochs	Obsolete Names for ICS Units
Quaternary	Holocene	Meghalayan			Cenozoic 6					0
		Northgrippian								0.0042
		Greenlandian								0.0082
	Pleistocene	Late Pleistocene								0.0117
		Chibanian								0.129
		Calabrian								0.774
		Gelasian								1.8
Neogene	Pliocene	Piacenzian					Tertiary †			2.58
	Pliocene	Zanclean								3.6
	Miocene	Messinian								5.333
		Tortonian								7.246
		Serravallian			Cenozoic 5					11.63
		Langhian								13.82
		Burdigalian								15.98
		Aquitanian								20.44
Paleogene	Oligocene	Chattian			Cenozoic 4					23.03
	Oligocene	Rupelian			Cenozoic 4					27.82
	Eocene	Priabonian			Cenozoic 3					33.9
		Bartonian			Cenozoic 3					37.71
		Lutetian			Cenozoic 2					41.2
		Ypresian			Cenozoic 2					47.8
	Paleocene	Thanetian			Cenozoic 1					56
		Selandian								59.2
		Danian								61.6
Cretaceous	Late Cretaceous	Maastrichtian			Cretaceous 8					66
		Campanian			Cretaceous 7					72.1
		Santonian			Cretaceous 6					83.6
		Coniacian								86.3
		Turonian								89.8
		Cenomanian			Cretaceous 5					93.9
	Early Cretaceous	Albian			Cretaceous 4					100.5
		Aptian			Cretaceous 3					113
		Barremian			Cretaceous 2					121.4
		Hauterivian			Cretaceous 2					125.77
		Valanginian			Cretaceous 1					132.6
		Berriasian			Cretaceous 1					139.8
Jurassic	Late Jurassic	Tithonian			Jurassic 6					145
		Kimmeridgian			Jurassic 5					149.2
		Oxfordian								154.8
	Middle Jurassic	Callovian								161.5
		Bathonian			Jurassic 4					165.3
		Bajocian			Jurassic 4					168.2
		Aalenian			Jurassic 3					170.9
	Early Jurassic	Toarcian			Jurassic 3					174.7
		Pliensbachian			Jurassic 2					184.2
		Sinemurian			Jurassic 1					192.9
		Hettangian			Jurassic 1					199.5
Triassic	Late Triassic	Rhaetian			Triassic 4					201.4
		Norian			Triassic 4					208.5
		Carnian			Triassic 3					227
	Middle Triassic	Ladinian			Triassic 2					237
	Middle Triassic	Anisian			Triassic 2					242
	Early Triassic	Olenekian			Triassic 1					247.2
	Early Triassic	Induan			Triassic 1					251.2
Permian	Lopingian	Changhsingian		Melekhovian	Permian 4					251.902
	Lopingian	Wuchiapingian						Longtanian †		254.14
	Guadalupian	Capitanian								259.51
		Wordian								264.28
		Wordian		Noginskian						264.9 *
		Roadian			Permian 3					266.9
	Cisuralian	Kungurian			Permian 2					273.01
		Kungurian		Pavlovoposadian						276.8 *
		Artinskian		Pavlovoposadian						283.5
		Artinskian		Rusavkinian						287.6 *
		Sakmarian	290.1
		Asselian	Permian 1		293.52
Carboniferous	Pennsylvanian	Gzhelian	Carboniferous 5		298.9
		Kasimovian		Dorogomilovian	303.7
				Khamovnikian	304.8
				Krevyakinian	305.8 *
		Moscovian	Myachkovian	Carboniferous 4	307
			Podolskian		308.9 *
			Kashirian		311.4 *
			Vereian		313.8
			Melekessian		314.8
		Bashkirian	Melekessian		315.2
			Cheremshanian		316.9 *
			Prikamian		318.6 *
			Severokeltmian		319.9 *
			Krasnopolyanian		321.2 *
			Voznesenian		321.9 *
	Mississippian	Serpukhovian	Zapaltjubian	Carboniferous 3	323.2
			Protvian		324.4 *
			Steshevian		326.8 *
			Tarusian		329 *
		Visean	Venevian	Carboniferous 2	330.9
			Mikhailovian		331.9 *
			Aleksinian		333.7 *
			Tulian		335.8 *
			Bobrikian		339.9 *
			Radaevkian		343.4 *
		Tournaisian	Kosvian	Carboniferous 1	346.7
			Kizelian		350.7 *
			Cherepetian		351.9 *
			Karakubian		354.4 *
			Upinian		356.3 *
			Malevkian		357.6 *
			Gumerovian		358 *
Devonian	Late Devonian	Famennian		Devonian 5	358.9
	Late Devonian	Frasnian		Devonian 4	372.2
	Middle Devonian	Givetian		Devonian 3	382.7
	Middle Devonian	Eifelian		Devonian 3	387.7
	Early Devonian	Emsian		Devonian 2	393.3
		Pragian		Devonian 1	407.6
		Lochkovian		Devonian 1	410.8
Silurian	Pridoli			Silurian 2	419.2
	Ludlow	Ludfordian			423
	Ludlow	Gorstian			425.6
	Wenlock	Homerian			427.4
	Wenlock	Sheinwoodian			430.5
	Llandovery	Telychian		Silurian 1	433.4
		Aeronian			438.5
		Rhuddanian			440.8
Ordovician	Late Ordovician	Hirnantian		Bolindian	Ordovician 5	443.8
		Katian		Bolindian		445.2
				Eastonian		449 *
				Gisbornian		452 *
		Sandbian		Gisbornian	Ordovician 4	453
	Middle Ordovician	Darriwilian		Darriwilian	Ordovician 3	458.4
		Dapingian		Yapeenian	Ordovician 2	467.3
		Dapingian		Castlemainian		468.5 *
	Early Ordovician	Floian		Chewtonian		470
				Bendigonian		471.8 *
				Lancefieldian		473.5 *
		Tremadocian		Lancefieldian	Ordovician 1	477.7
		Tremadocian		Warendian	Ordovician 1	482.8 *
Cambrian	Furongian	Stage 10			Cambrian 5	Late Cambrian	485.4
		Jiangshanian					489.5
		Paibian					494
	Miaolingian	Guzhangian			Cambrian 4	Middle Cambrian	Series 3 †	497
		Drumian			Cambrian 4			500.5
		Wuliuan			Cambrian 3			Stage 5 †	504.5
	Series 2	Stage 4			Cambrian 3	Early Cambrian			509
	Series 2	Stage 3			Cambrian 2				514
	Terreneuvian	Stage 2			Cambrian 2				521
	Terreneuvian	Fortunian			Cambrian 1				529
										538.8