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.

This timescale is used in the definition of 126762 collections

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International Chronostratigraphic Timescale					Silurian Ages of Europe	Permian of Western Europe	Precambrian of Russia	Silurian of the Baltic
Phanerozoic	Paleozoic	Permian	Lopingian	Wuchiapingian		Zechstein			254.14
			Guadalupian	Capitanian		Rotliegendes			259.51
				Wordian					264.28
				Roadian					266.9
			Cisuralian	Kungurian					273.01
				Artinskian		Autunian			283.5
				Sakmarian					290.1
				Asselian					293.52
		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					Ohesaare	419.2
			Pridoli					Kaugetuma	421.7 *
			Ludlow	Ludfordian				Kuressaare	423
				Ludfordian				Paadla	423.4 *
				Gorstian				Paadla	425.6
			Wenlock	Homerian	Gleedonian			Rootsikula	427.4
					Gleedonian			Jaagarahu	429.2 *
					Whitwellian				429.7 *
				Sheinwoodian					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					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