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 128028 collections

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International Chronostratigraphic Timescale					Obsolete Precambrian Ages		Devonian of Germany	Permian of the Salt Range	Ordovician of Australia	Permian of the Pamirs	Devonian Subages	Permian of Western Europe	Precambrian of Russia	Silurian of the Baltic
Phanerozoic	Mesozoic	Triassic	Early Triassic	Induan				Kathwai							251.5 *
	Paleozoic	Permian	Lopingian	Changhsingian				Kathwai		Dorashamian					251.902
															252.4 *
								Chhidru							252.9 *
				Wuchiapingian				Chhidru		Dzhulfian		Zechstein			254.14
								Kalabagh							255 *
								Wargal							256 *
			Guadalupian	Capitanian						Midian		Rotliegendes			259.51
				Wordian											264.28
															265.3 *
								Amb							266.1 *
										Murgabian					266.2 *
				Roadian											266.9
				Roadian											270.7 *
			Cisuralian	Kungurian						Kubergandian					273.01
				Kungurian						Bolorian					279.8
				Artinskian						Bolorian		Autunian			283.5
				Artinskian						Yakhtashian					286
				Sakmarian						Sakmarian					290.1
				Asselian						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			Wocklum/Dasberg/Hemberg/Nehden				Late Famennian				358.9
											Middle Famennian				365.3 *
											Early Famennian				368.5 *
				Frasnian			Adorf				Late Frasnian				372.2
											Middle Frasnian				375.4 *
											Early Frasnian				379.3 *
			Middle Devonian	Givetian			Givetian				Late Givetian				382.7
											Middle Givetian				383.7 *
											Early Givetian				385.9 *
				Eifelian			Eifelian				Late Eifelian				387.7
				Eifelian			Eifelian				Early Eifelian				390.3 *
			Early Devonian	Emsian			Emsian				Late Emsian				393.3
				Emsian			Emsian				Early Emsian				398.3 *
				Pragian			Siegen				Pragian				407.6
				Lochkovian			Gedinnine				Late Lochkovian				410.8
											Middle Lochkovian				412.8 *
											Early Lochkovian				415.6 *
		Silurian	Pridoli											Ohesaare	419.2
			Pridoli											Kaugetuma	421.7 *
			Ludlow	Ludfordian										Kuressaare	423
				Ludfordian										Paadla	423.4 *
				Gorstian										Paadla	425.6
			Wenlock	Homerian										Rootsikula	427.4
				Homerian										Jaagarahu	429.2 *
				Sheinwoodian										Jaagarahu	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					Bolindian						443.8
				Katian					Bolindian						445.2
									Eastonian						449 *
									Gisbornian						452 *
				Sandbian					Gisbornian						453
Middle Ordovician			Darriwilian	Darriwilian	458.4
	Dapingian		Yapeenian	467.3
	Dapingian		Castlemainian	468.5 *
Early Ordovician	Floian		Chewtonian	470
			Bendigonian	471.8 *
			Lancefieldian	473.5 *
	Tremadocian		Lancefieldian	477.7
	Tremadocian		Warendian	482.8 *
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 †	Vendian				538.8
		Ediacaran				Vendian †		Wonokan †	Vendian				571.7 *
		Cryogenian								635
		Tonian								720
		Tonian							Karatau	800
	Mesoproterozoic	Stenian							Karatau	1000
		Stenian							Yurmatian	1100
		Ectasian							Yurmatian	1200
		Ectasian							Burzyan	1375
															1400