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 126699 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Permian of North America		Permian of the Salt Range	Carboniferous Subepochs	Silurian of the Baltic	Devonian Subages	Carbo-Permian of the Russian Platform	Cambrian Epochs	Obsolete Names for ICS Units
Neogene	Pliocene	Piacenzian									Tertiary †		2.58
	Pliocene	Zanclean											3.6
	Miocene	Messinian											5.333
		Tortonian											7.246
		Serravallian											11.63
		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											247.2
		Induan											251.2
		Induan			Kathwai								251.5 *
Permian	Lopingian	Changhsingian			Kathwai				Melekhovian				251.902
													252.4 *
					Chhidru								252.9 *
		Wuchiapingian			Chhidru							Longtanian †	254.14
					Kalabagh								255 *
					Wargal								256 *
	Guadalupian	Capitanian	Capitanian										259.51
		Wordian	Wordian										264.28
									Noginskian				264.9 *
													265.3 *
					Amb								266.1 *
		Roadian	Roadian		Amb								266.9
		Roadian	Roadian										270.7 *
	Cisuralian	Kungurian	Leonardian	Cathedralian									273.01
				Cathedralian					Pavlovoposadian				276.8 *
				Hessian									281.9 *
		Artinskian		Hessian		283.5
			Wolfcampian	Lenoxian		286.1 *
						Rusavkinian	287.6 *
		Sakmarian					290.1
		Asselian		Nealian			293.52
Carboniferous	Pennsylvanian	Gzhelian					Late Pennsylvanian	298.9
		Kasimovian				Dorogomilovian		303.7
						Khamovnikian		304.8
						Krevyakinian		305.8 *
		Moscovian				Middle Pennsylvanian	Myachkovian	307
							Podolskian	308.9 *
							Kashirian	311.4 *
							Vereian	313.8
							Melekessian	314.8
		Bashkirian				Early Pennsylvanian	Melekessian	315.2
							Cheremshanian	316.9 *
							Prikamian	318.6 *
							Severokeltmian	319.9 *
							Krasnopolyanian	321.2 *
							Voznesenian	321.9 *
	Mississippian	Serpukhovian				Late Mississippian	Zapaltjubian	323.2
							Protvian	324.4 *
							Steshevian	326.8 *
							Tarusian	329 *
		Visean				Middle Mississippian	Venevian	330.9
							Mikhailovian	331.9 *
							Aleksinian	333.7 *
							Tulian	335.8 *
							Bobrikian	339.9 *
							Radaevkian	343.4 *
		Tournaisian				Early Mississippian	Kosvian	346.7
							Kizelian	350.7 *
							Cherepetian	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						Ohesaare			419.2
	Pridoli						Kaugetuma			421.7 *
	Ludlow	Ludfordian					Kuressaare			423
		Ludfordian					Paadla			423.4 *
		Gorstian					Paadla			425.6
	Wenlock	Homerian					Rootsikula			427.4
		Homerian			Jaagarahu		429.2 *
		Sheinwoodian			Jaagarahu		430.5
		Sheinwoodian			Jaani		431.8 *
	Llandovery	Telychian			Jaani		433.4
		Telychian			Adavere		434 *
		Aeronian			Adavere		438.5
		Aeronian			Raikkula		439.4 *
		Rhuddanian			Raikkula		440.8
		Rhuddanian			Juuru		441.4 *
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		Late Cambrian	485.4
		Jiangshanian			489.5
		Paibian			494
	Miaolingian	Guzhangian		Middle Cambrian	Series 3 †		497
		Drumian					500.5
		Wuliuan					Stage 5 †			504.5
	Series 2	Stage 4		Early Cambrian						509
	Series 2	Stage 3								514
	Terreneuvian	Stage 2								521
	Terreneuvian	Fortunian								529
													538.8