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

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 127083 collections

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International Chronostratigraphic Timescale					Carboniferous of Western Europe		Silurian of England		Silurian of the Baltic	Devonian of Czechoslovakia	Ordovician of Australia	Cambrian of Britain		Permian of the Pamirs	Obsolete Precambrian Ages			Precambrian of Russia
Phanerozoic	Paleozoic	Permian	Lopingian	Changhsingian										Dorashamian					251.902
			Lopingian	Wuchiapingian										Dzhulfian					254.14
			Guadalupian	Capitanian										Midian					259.51
				Wordian										Midian					264.28
				Wordian										Murgabian					266.2 *
				Roadian										Murgabian					266.9
			Cisuralian	Kungurian										Kubergandian					273.01
				Kungurian										Bolorian					279.8
				Artinskian										Bolorian					283.5
				Artinskian										Yakhtashian					286
				Sakmarian										Sakmarian					290.1
				Asselian										Asselian					293.52
				Asselian	Kuzel									Asselian					297.7
		Carboniferous	Pennsylvanian	Gzhelian	Kuzel														298.9
					Stephanian	Stephanian C													300.3 *
						Stephanian B													300.9 *
						Stephanian A													301.4 *
				Kasimovian		Stephanian A													303.7
				Kasimovian		Cantabrian													305 *
				Moscovian		Cantabrian													307
					Westphalian	Westphalian D													307.4 *
						Westphalian C													309.8
						Westphalian B													314.6
				Bashkirian		Westphalian B													315.2
						Westphalian A													317 *
					Namurian	Yeadonian													318.8 *
						Marsdenian													320.2 *
						Kinderscoutian													321.5 *
						Alportian													322 *
						Chokierian													323.1 *
			Mississippian	Serpukhovian		Chokierian													323.2
						Arnsbergian													324 *
						Pendleian													327.4 *
				Visean	Warnantian	Brigantian †													330.9
					Livian	Asbian †													336.3 *
					Moliniacian	Holkerian †/Arundian/Chadian													340.2 *
				Tournaisian	Ivorian														346.7
				Tournaisian	Hastarian														353.7 *
		Devonian	Late Devonian	Famennian															358.9
			Late Devonian	Frasnian															372.2
			Middle Devonian	Givetian						Srbsko									382.7
			Middle Devonian	Eifelian						Chotec									387.7
			Early Devonian	Emsian						Daleje/Zlichovian									393.3
				Pragian						Pragian									407.6
				Lochkovian						Lochkovian									410.8
		Silurian	Pridoli				Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	Ohesaare										419.2
								Bringewood/Elton	Ohesaare										421.3
								Bringewood/Elton	Kaugetuma										421.7 *
			Ludlow	Ludfordian			Coalbrookdale	Wenlock (England)/Tickwood	Kuressaare										423
				Ludfordian				Wenlock (England)/Tickwood	Paadla										423.4 *
				Gorstian															425.6
				Gorstian				Buildwas											426.4 *
			Wenlock	Homerian				Buildwas	Rootsikula										427.4
							Wych	Woolhope	Rootsikula										428.4 *
									Jaagarahu										429.2 *
				Sheinwoodian					Jaagarahu										430.5
				Sheinwoodian					Jaani										431.8 *
			Llandovery	Telychian					Jaani										433.4
									Adavere										434 *
																			436.3 *
				Aeronian															438.5
							Cowleigh Park												439.3 *
									Raikkula										439.4 *
				Rhuddanian					Raikkula										440.8
Juuru	441.4 *			Rhuddanian
Ordovician	Late Ordovician	Hirnantian					Bolindian		443.8
		Katian					Bolindian		445.2
							Eastonian		449 *
							Gisbornian		452 *
		Sandbian					Gisbornian		453
	Middle Ordovician	Darriwilian					Darriwilian		458.4
		Dapingian					Yapeenian		467.3
		Dapingian					Castlemainian		468.5 *
	Early Ordovician	Floian					Chewtonian		470
							Bendigonian		471.8 *
							Lancefieldian		473.5 *
		Tremadocian					Lancefieldian		477.7
		Tremadocian					Warendian		482.8 *
Cambrian	Furongian	Stage 10							Merioneth		Dolgellian/Trempealeauan	Niuchehean	Taoyuanian †	485.4
		Stage 10									Festiniogian	Niuchehean		489.2 *
		Jiangshanian									Festiniogian	Jiangshanian		489.5
		Jiangshanian									Maentwrogian	Jiangshanian		493.1 *
		Paibian										Paibian		494
		Paibian										Paibian	Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian							St Davids			Guzhangian	Wangcunian †	497
		Drumian										Drumian	Wangcunian †	500.5
		Wuliuan										Wuliuan/Taijangian		504.5
	Series 2	Stage 4							Caerfai			Duyunian		509
	Series 2	Stage 3										Nangaoian		514
	Terreneuvian	Stage 2										Meishucunian		521
		Fortunian										Meishucunian		529
		Fortunian										Jinnigian		530.7
Proterozoic	Neoproterozoic	Ediacaran													Vendian †	Poundian †	Vendian	538.8
		Ediacaran													Vendian †	Wonokan †	Vendian	571.7 *
		Cryogenian																635
		Tonian																720
		Tonian															Karatau	800
	Mesoproterozoic	Stenian															Karatau	1000
		Stenian															Yurmatian	1100
		Ectasian															Yurmatian	1200
		Ectasian				Burzyan											1375
																			1400