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

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 126762 collections

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International Chronostratigraphic Timescale					Carboniferous of Western Europe		Precambrian of Russia	Permian of China
Phanerozoic	Paleozoic	Permian	Lopingian	Changhsingian				Meishanian	251.902
				Changhsingian				Baoqingian	253.4 *
				Wuchiapingian				Laoshanian	254.14
				Wuchiapingian				Laibinian	257.7 *
			Guadalupian	Capitanian				Lengwuan	259.51
				Wordian				Kuhfengian	264.28
				Roadian				Kuhfengian	266.9
			Cisuralian	Kungurian				Luodianian	273.01
				Artinskian				Luodianian	283.5
				Artinskian				Longlinian	285.4 *
				Sakmarian				Longlinian	290.1
				Asselian				Zisongian	293.52
				Asselian	Kuzel				297.7
		Carboniferous	Pennsylvanian	Gzhelian					298.9
									300.1
					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					382.7
			Middle Devonian	Eifelian					387.7
			Early Devonian	Emsian					393.3
				Pragian					407.6
				Lochkovian					410.8
		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		497
	Drumian		500.5
	Wuliuan		504.5
Series 2	Stage 4		509
Series 2	Stage 3		514
Terreneuvian	Stage 2		521
Terreneuvian	Fortunian		529
Proterozoic	Neoproterozoic	Ediacaran					Vendian		538.8
		Cryogenian							635
		Tonian							720
		Tonian					Karatau		800
	Mesoproterozoic	Stenian					Karatau		1000
		Stenian					Yurmatian		1100
		Ectasian					Yurmatian		1200
		Ectasian					Burzyan	1375
									1400