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					Silurian of the Baltic	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		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		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
	Floran		Drumian					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