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					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		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		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