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
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

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 126662 collections

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International Chronostratigraphic Timescale			Carbo-Permian of the Russian Platform	Cenozoic Subepochs	Carboniferous of North America	Permian of North America		Cambrian of West Avalonia	Devonian Subages	Obsolete Names for ICS Units
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		Late Pliocene						Tertiary †		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										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	Melekhovian									251.902
	Lopingian	Wuchiapingian									Longtanian †	254.14
	Guadalupian	Capitanian				Capitanian						259.51
		Wordian				Wordian						264.28
		Wordian	Noginskian			Wordian						264.9 *
		Roadian				Roadian						266.9
	Cisuralian	Kungurian				Leonardian	Cathedralian					273.01
			Pavlovoposadian				Cathedralian					276.8 *
							Hessian					281.9 *
		Artinskian					Hessian					283.5
						Wolfcampian	Lenoxian					286.1 *
			Rusavkinian									287.6 *
		Sakmarian										290.1
		Asselian			Bursumian †		Nealian	293.52
Carboniferous	Pennsylvanian	Gzhelian			Virgilian			Mapingian †	298.9
		Kasimovian	Dorogomilovian		Missourian				303.7
			Khamovnikian						304.8
			Krevyakinian						305.8 *
			Krevyakinian		Desmoinesian				305.9 *
		Moscovian	Myachkovian						307
			Podolskian						308.9 *
			Kashirian						311.4 *
			Kashirian		Atokan				312.7 *
			Vereian						313.8
			Melekessian						314.8
		Bashkirian	Melekessian						315.2
			Cheremshanian						316.9 *
			Cheremshanian		Morrowan				318.4 *
			Prikamian						318.6 *
			Severokeltmian						319.9 *
			Krasnopolyanian						321.2 *
			Voznesenian						321.9 *
	Mississippian	Serpukhovian	Zapaltjubian		Chesterian				323.2
			Protvian						324.4 *
			Steshevian	326.8 *
			Tarusian	329 *
		Visean	Venevian	330.9
			Mikhailovian	331.9 *
			Aleksinian	333.7 *
			Tulian	Meramecian	335.8 *
			Bobrikian	Meramecian	339.9 *
			Bobrikian	Osagean	343.1 *
			Radaevkian		343.4 *
		Tournaisian	Kosvian		346.7
			Kizelian		350.7 *
			Cherepetian	Kinderhookian	351.9 *
			Karakubian		354.4 *
			Upinian		356.3 *
			Malevkian		357.6 *
			Gumerovian		358 *
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				485.4
		Jiangshanian				489.5
		Paibian				494
	Miaolingian	Guzhangian				Series 3 †	497
		Guzhangian					Arcadian	498.4
		Drumian						500.5
		Wuliuan						Stage 5 †	504.5
	Series 2	Stage 4				Branchian			509
		Stage 3				Branchian			514
		Stage 3				Placentian			517.1
	Terreneuvian	Stage 2							521
	Terreneuvian	Fortunian							529
												538.8