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, 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 127682 collections

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International Chronostratigraphic Timescale					Obsolete Carboniferous Ages of China	Silurian of England		Permian Subages of Germany	Devonian of Germany	Devonian of France	Precambrian of Russia	Silurian Ages of Europe
Phanerozoic	Paleozoic	Permian	Lopingian	Changhsingian				Buntsandstein					251.902
			Lopingian	Wuchiapingian				Buntsandstein					254.14
			Guadalupian	Capitanian				Ohre/Aller					259.51
				Wordian				Leine					264.28
				Roadian									266.9
			Cisuralian	Kungurian									273.01
				Artinskian									283.5
				Sakmarian									290.1
				Asselian									293.52
		Carboniferous	Pennsylvanian	Gzhelian	Mapingian †								298.9
				Kasimovian	Mapingian †								303.7
				Kasimovian									305.9
				Moscovian									307
				Bashkirian									315.2
			Mississippian	Serpukhovian									323.2
				Visean									330.9
				Tournaisian									346.7
		Devonian	Late Devonian	Famennian					Wocklum/Dasberg/Hemberg/Nehden	Famennian			358.9
			Late Devonian	Frasnian					Adorf	Frasnian			372.2
			Middle Devonian	Givetian					Givetian	Givetian			382.7
			Middle Devonian	Eifelian					Eifelian	Couvinien			387.7
			Early Devonian	Emsian					Emsian				393.3
				Pragian					Siegen				407.6
				Pragian					Siegen	Coblencien			408.2 *
				Lochkovian					Gedinnine	Gedinnine			410.8
		Silurian	Pridoli			Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine						419.2
			Pridoli			Red Downtonian/Temeside Shales/Downton Castle	Bringewood/Elton						421.3
			Ludlow	Ludfordian		Coalbrookdale	Wenlock (England)/Tickwood						423
				Gorstian									425.6
				Gorstian			Buildwas						426.4 *
			Wenlock	Homerian			Buildwas					Gleedonian	427.4
						Wych	Woolhope					Gleedonian	428.4 *
												Whitwellian	429.7 *
				Sheinwoodian									430.5
			Llandovery	Telychian									433.4
				Telychian									436.3 *
				Aeronian									438.5
				Aeronian		Cowleigh Park							439.3 *
				Rhuddanian		Cowleigh Park							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