PBDB Interval

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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 127412 collections

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International Chronostratigraphic Timescale					Permian of the Russian Platform		Obsolete Precambrian Ages		Cambrian of Australia	Cambrian of Kazakhstan	Permo-Triassic Subages of Eastern Europe	Ordovician of Australia	Ordovician of Britain
Phanerozoic	Mesozoic	Triassic	Early Triassic	Olenekian							Vokhmian						247.2
	Mesozoic	Triassic	Early Triassic	Induan							Vokhmian						251.2
	Paleozoic	Permian	Lopingian	Changhsingian													251.902
				Wuchiapingian							Late Vyatkian/Early Vyatkian						254.14
				Wuchiapingian	Tatarian	Vyatkian					Late Vyatkian/Early Vyatkian						256.8 *
			Guadalupian	Capitanian		Severodvinian					Late Severodvinian/Early Severodvinian						259.51
				Wordian		Urzhumian					Late Urzhumian/Early Urzhumian						264.28
				Roadian	Kazanian	Povolzhian					Late Kazanian/Early Kazanian						266.9
				Roadian	Kazanian	Sokian					Late Kazanian/Early Kazanian						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								Bolindian	Ashgill	Hirnantian			443.8
				Katian										Rawtheyan			445.2
														Cautleyan			448.9 *
												Eastonian		Cautleyan			449 *
														Pusgillian			449.3 *
													Caradoc	Streffordian	Onnian †		449.6 *
														Cheneyan			451.5 *
												Gisbornian		Cheneyan			452 *
														Burrellian			452.7 *
				Sandbian													453
															Actonian †		453.2 *
															Marshbrookian †	Woolstonian †	454.2 *
															Longvillian †		455.2 *
														Aurelucian	Longvillian †		456.8 *
														Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
			Middle Ordovician	Darriwilian								Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
				Darriwilian								Darriwilian		Abereiddian/Early Llanvirn			461.3 *
				Dapingian								Yapeenian		Abereiddian/Early Llanvirn			467.3
												Yapeenian	Arenig	Fennian			468.4 *
												Castlemainian					468.5 *
			Early Ordovician	Floian								Chewtonian					470
												Chewtonian		Whitlandian			471.1 *
Bendigonian							471.8 *
Lancefieldian							473.5 *
	Moridunian						474.3 *
	Tremadocian			Ungurian			Tremadoc	Migneintian	477.7
								Cressagian	480.8 *
Warendian								Cressagian	482.8 *
Warendian									485 *
Cambrian	Furongian	Stage 10	Datsonian	Batyrbaian						485.4
		Stage 10	Payntonian							486.8 *
		Jiangshanian	Iverian							489.5
				Aksaian						490.7 *
				Sakian						492.2 *
		Paibian	Idamean	Sakian						494
	Miaolingian	Guzhangian	Mindyallan	Ayusokkanian						497
			Boomerangian	Ayusokkanian						499
			Boomerangian							499.5
		Drumian	Undillan	Zhanaarykian						500.5
		Drumian	Floran	Tuesaian						503
		Wuliuan	Templetonian	Tuesaian						504.5
			Templetonian							505.3
			Ordian		507.8 *
	Series 2	Stage 4			509
				Toyonian	510 *
				Toyonian	510.8 *
				Botomian	512.5 *
		Stage 3		Botomian	514
		Stage 3		Atdabanian	515.6 *
	Terreneuvian	Stage 2		Tommotian	521
		Stage 2			525.5
		Fortunian			529
Proterozoic	Neoproterozoic	Ediacaran								Vendian †	Poundian †	538.8
Proterozoic	Neoproterozoic	Ediacaran								Vendian †	Wonokan †	571.7 *
																	635