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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 126691 collections

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International Chronostratigraphic Timescale					Cambrian of West Avalonia	Ordovician of China			Obsolete Carboniferous Ages of China	Cambrian of Australia	Precambrian of Russia	Ordovician of Ibero-Bohemia				Obsolete Names for ICS Units
Phanerozoic	Cenozoic	Neogene	Pliocene	Piacenzian												Tertiary †			2.58
			Pliocene	Zanclean															3.6
			Miocene	Messinian															5.333
				Tortonian															7.246
				Serravallian															11.63
				Langhian															13.82
				Burdigalian															15.98
				Aquitanian															20.44
		Paleogene	Oligocene	Chattian															23.03
			Oligocene	Rupelian															27.82
			Eocene	Priabonian															33.9
				Bartonian															37.71
				Lutetian															41.2
				Ypresian															47.8
			Paleocene	Thanetian															56
				Selandian															59.2
				Danian															61.6
	Mesozoic	Cretaceous	Late Cretaceous	Maastrichtian															66
				Campanian															72.1
				Santonian															83.6
				Coniacian															86.3
				Turonian															89.8
				Cenomanian															93.9
			Early Cretaceous	Albian															100.5
				Aptian															113
				Barremian															121.4
				Hauterivian															125.77
				Valanginian															132.6
				Berriasian															139.8
		Jurassic	Late Jurassic	Tithonian															145
				Kimmeridgian															149.2
				Oxfordian															154.8
			Middle Jurassic	Callovian															161.5
				Bathonian															165.3
				Bajocian															168.2
				Aalenian															170.9
			Early Jurassic	Toarcian															174.7
				Pliensbachian															184.2
				Sinemurian															192.9
				Hettangian															199.5
		Triassic	Late Triassic	Rhaetian															201.4
				Norian															208.5
				Carnian															227
			Middle Triassic	Ladinian															237
			Middle Triassic	Anisian															242
			Early Triassic	Olenekian															247.2
			Early Triassic	Induan															251.2
	Paleozoic	Permian	Lopingian	Changhsingian															251.902
			Lopingian	Wuchiapingian													Longtanian †		254.14
			Guadalupian	Capitanian															259.51
				Wordian															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	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	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Kosovian	443.8
			Katian	Chientangkiangian		Wufeng †	Kralodvorian	Bohdalec †		445.2
				Neichianshanian/Hanjiang			Kralodvorian			449.5
							Berounian			449.7 *
			Sandbian							453
										Zahorany †/Vinice	Letna †	456.2 *
								Liben †				458 *
		Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo							458.4
							Dobrotivian					458.5 *
							Oretanian					459.7 *
								Sarka †				461.7 *
					Hunjiang †	Dawan †/Daobaowan/Ningkuo		Sarka †				466.3 *
			Dapingian	Dapingian				Klabava †				467.3
			Dapingian	Dapingian			Arenigian					468
		Early Ordovician	Floian	Yiyangian			Arenigian					470
			Tremadocian	Xinchangian			Tremadocian					477.7
			Tremadocian	Xinchangian		Lianghekou †	Tremadocian					477.9 *
Cambrian		Furongian	Stage 10				Datsonian						485.4
			Stage 10				Payntonian						486.8 *
			Jiangshanian				Iverian						489.5
			Paibian				Idamean						494
		Miaolingian	Guzhangian				Mindyallan						Series 3 †	497
							Mindyallan							Arcadian	498.4
							Boomerangian								499
			Drumian				Undillan								500.5
			Drumian				Floran								503
			Wuliuan				Templetonian								Stage 5 †	504.5
			Wuliuan				Ordian								Stage 5 †	507.8 *
		Series 2	Stage 4				Ordian						Branchian			509
			Stage 4													510.8 *
			Stage 3													514
			Stage 3										Placentian			517.1
	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