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
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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 126844 collections

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International Chronostratigraphic Timescale					Obsolete Precambrian Ages		Permian of the Russian Platform
Phanerozoic	Paleozoic	Permian	Lopingian	Wuchiapingian			Tatarian	Vyatkian	256.8 *
			Guadalupian	Capitanian				Severodvinian	259.51
				Wordian				Urzhumian	264.28
				Roadian			Kazanian	Povolzhian	266.9
				Roadian			Kazanian	Sokian	270.7 *
			Cisuralian	Kungurian			Kungurian	Irenian/Ufimian	273.01
								Filipovian	276.5 *
								Saraninian	280.1 *
				Artinskian			Artinskian	Sarginian	283.5
								Irginian	285.9 *
								Burtsevian	287.8 *
				Sakmarian			Sakmarian	Sterlitamakian	290.1
				Sakmarian			Sakmarian	Tastubian	291.7 *
				Asselian			Asselian	Shikhanian	293.52
								Uskalykian	294.8
								Surenian	297.5
		Carboniferous	Pennsylvanian	Gzhelian					298.9
				Kasimovian					303.7
				Moscovian					307
				Bashkirian					315.2
			Mississippian	Serpukhovian					323.2
				Visean					330.9
				Tournaisian					346.7
		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 †	Poundian †			538.8
Proterozoic	Neoproterozoic	Ediacaran			Vendian †	Wonokan †			571.7 *
									635