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
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 126610 collections

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International Chronostratigraphic Timescale					Devonian Subages	Ordovician of Ibero-Bohemia				Ordovician of China			Carboniferous of China	Obsolete Names for ICS Units
Phanerozoic	Cenozoic	Quaternary	Holocene	Meghalayan													0
				Northgrippian													0.0042
				Greenlandian													0.0082
			Pleistocene	Late Pleistocene													0.0117
				Chibanian													0.129
				Calabrian													0.774
				Gelasian													1.8
		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													298.9
Xiaodushanian				Gzhelian	300 *
Xiaodushanian				Kasimovian	303.7
Dalaun				Kasimovian	305.8 *
				Moscovian	307
				Bashkirian	315.2
Huashibanian					318.5 *
Lousuan					321.2 *
Mississippian			Serpukhovian	Dewunian	323.2
			Serpukhovian	Shangsian	330.8 *
			Visean	Shangsian	330.9
			Visean	Jiusian	335 *
			Tournaisian	Tangbagouan	346.7
Devonian		Late Devonian	Famennian	Late Famennian		358.9
				Middle Famennian		365.3 *
				Early Famennian		368.5 *
			Frasnian	Late Frasnian		372.2
				Middle Frasnian		375.4 *
				Early Frasnian		379.3 *
		Middle Devonian	Givetian	Late Givetian		382.7
				Middle Givetian		383.7 *
				Early Givetian		385.9 *
			Eifelian	Late Eifelian		387.7
			Eifelian	Early Eifelian		390.3 *
		Early Devonian	Emsian	Late Emsian		393.3
			Emsian	Early Emsian		398.3 *
			Pragian	Pragian		407.6
			Lochkovian	Late Lochkovian		410.8
				Middle Lochkovian		412.8 *
				Early Lochkovian		415.6 *
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			Kosovian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	443.8
			Katian			Kralodvorian	Bohdalec †		Wufeng †	Chientangkiangian	445.2
						Kralodvorian			Neichianshanian/Hanjiang		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 *
							Sarka †		Hunjiang †	Dawan †/Daobaowan/Ningkuo			466.3 *
			Dapingian				Klabava †	Dapingian					467.3
			Dapingian			Arenigian		Dapingian					468
		Early Ordovician	Floian			Arenigian		Yiyangian					470
			Tremadocian			Tremadocian		Xinchangian					477.7
			Tremadocian			Tremadocian		Xinchangian		Lianghekou †			477.9 *
Cambrian	Furongian	Stage 10								485.4
		Jiangshanian								489.5
		Paibian								494
	Miaolingian	Guzhangian								Series 3 †			497
		Drumian											500.5
		Wuliuan											Stage 5 †	504.5
	Series 2	Stage 4												509
	Series 2	Stage 3												514
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
Proterozoic	Neoproterozoic	Ediacaran														538.8
		Cryogenian														635
		Tonian														720
	Mesoproterozoic	Stenian														1000
		Ectasian														1200
		Calymmian														1400
	Paleoproterozoic	Statherian														1600
		Orosirian														1800
		Rhyacian														2050
		Siderian														2300
Archean	Neoarchean															2500
	Mesoarchean															2800
	Paleoarchean				3200
	Eoarchean				3600
Hadean					4000
																	4600