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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 126662 collections

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International Chronostratigraphic Timescale			Ordovician of the Baltic				Devonian of Czechoslovakia	Ordovician of Ibero-Bohemia				Cretaceous Subepochs	Cambrian of West Avalonia	Devonian Subages	Obsolete Carboniferous Ages of China	Obsolete Names for ICS Units
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
Cretaceous	Late Cretaceous	Maastrichtian										Senonian						66
		Campanian																72.1
		Santonian																83.6
		Coniacian																86.3
		Turonian																89.8
		Cenomanian																93.9
	Early Cretaceous	Albian										Gallic						100.5
		Aptian																113
		Barremian																121.4
		Hauterivian										Neocomian						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
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	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	Srbsko	Late Givetian	382.7
				Middle Givetian	383.7 *
				Early Givetian	385.9 *
		Eifelian	Chotec	Late Eifelian	387.7
		Eifelian	Chotec	Early Eifelian	390.3 *
	Early Devonian	Emsian	Daleje/Zlichovian	Late Emsian	393.3
		Emsian	Daleje/Zlichovian	Early Emsian	398.3 *
		Pragian	Pragian	Pragian	407.6
		Lochkovian	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			Harju	Porkuni	Kosovian	443.8
		Katian				Pirgu	Kralodvorian	Bohdalec †	445.2
						Vormsi	Kralodvorian		449.6 *
						Vormsi	Berounian		449.7 *
						Nabala			Johvi †	450 *
					Viru	Rakvere				450.6 *
						Oandu				452 *
		Sandbian				Keila			Idavere †	453
						Haljala				453.9
						Haljala				Zahorany †/Vinice	Letna †	456.2 *
						Kukruse						456.4 *
						Uhaku			Aluoja †			457.5 *
								Liben †				458 *
	Middle Ordovician	Darriwilian										458.4
							Dobrotivian					458.5 *
						Lasnamagi	Dobrotivian					458.9 *
						Lasnamagi	Oretanian					459.7 *
						Aseri						460.4 *
						Aseri		Sarka †				461.7 *
					Oeland	Kunda						462.9 *
						Kunda			Valaste †/Hunderum			464.3 *
						Volkhov						Langevoja †/Vaana/Saka	467.1 *
		Dapingian						Klabava †					467.3
							Arenigian						468
						Billingen							469.3 *
	Early Ordovician	Floian											470
									Latorp †				470.1 *
						Hunneberg							473.7 *
		Tremadocian				Hunneberg	Tremadocian						477.7
						Varangu							481.3 *
						Pakerort							482.2 *
Cambrian	Furongian	Stage 10				Pakerort							485.4
													486.3 *
													486.5
		Jiangshanian											489.5
		Paibian											494
	Miaolingian	Guzhangian											Series 3 †	497
		Guzhangian												Arcadian	498.4
		Drumian													500.5
		Wuliuan													Stage 5 †	504.5
	Series 2	Stage 4											Branchian			509
		Stage 3											Branchian			514
		Stage 3											Placentian			517.1
	Terreneuvian	Stage 2														521
	Terreneuvian	Fortunian														529
																		538.8