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 126701 collections

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International Chronostratigraphic Timescale			Cambrian of Australia	Carbo-Permian of the Russian Platform	Ordovician of the Baltic				Carboniferous 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											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
Permian	Lopingian	Changhsingian		Melekhovian									251.902
	Lopingian	Wuchiapingian									Longtanian †		254.14
	Guadalupian	Capitanian											259.51
		Wordian											264.28
		Wordian		Noginskian									264.9 *
		Roadian											266.9
	Cisuralian	Kungurian											273.01
		Kungurian		Pavlovoposadian									276.8 *
		Artinskian		Pavlovoposadian									283.5
		Artinskian		Rusavkinian									287.6 *
		Sakmarian											290.1
		Asselian											293.52
Carboniferous	Pennsylvanian	Gzhelian											298.9
		Gzhelian							Xiaodushanian				300 *
		Kasimovian		Dorogomilovian									303.7
				Khamovnikian									304.8
				Krevyakinian					Dalaun				305.8 *
		Moscovian	Myachkovian	307
			Podolskian	308.9 *
			Kashirian	311.4 *
			Vereian	313.8
			Melekessian	314.8
		Bashkirian	Melekessian	315.2
			Cheremshanian	316.9 *
			Cheremshanian	Huashibanian	318.5 *
			Prikamian		318.6 *
			Severokeltmian		319.9 *
			Krasnopolyanian	Lousuan	321.2 *
			Voznesenian	Lousuan	321.9 *
	Mississippian	Serpukhovian	Zapaltjubian	Dewunian	323.2
			Protvian		324.4 *
			Steshevian		326.8 *
			Tarusian		329 *
			Tarusian	Shangsian	330.8 *
		Visean	Venevian		330.9
			Mikhailovian		331.9 *
			Aleksinian		333.7 *
			Aleksinian	Jiusian	335 *
			Tulian		335.8 *
			Bobrikian		339.9 *
			Radaevkian		343.4 *
		Tournaisian	Kosvian	Tangbagouan	346.7
			Kizelian		350.7 *
			Cherepetian		351.9 *
			Karakubian		354.4 *
			Upinian		356.3 *
			Malevkian		357.6 *
			Gumerovian		358 *
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			Harju	Porkuni	443.8
		Katian				Pirgu	445.2
						Vormsi	449.6 *
						Nabala	Johvi †	450 *
					Viru	Rakvere		450.6 *
						Oandu		452 *
		Sandbian				Keila	Idavere †	453
						Haljala		453.9
						Kukruse		456.4 *
						Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian				Uhaku		458.4
						Lasnamagi		458.9 *
						Aseri		460.4 *
					Oeland	Kunda		462.9 *
						Kunda	Valaste †/Hunderum	464.3 *
						Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian				Volkhov			467.3
		Dapingian				Billingen			469.3 *
	Early Ordovician	Floian							470
							Latorp †		470.1 *
						Hunneberg			473.7 *
		Tremadocian				Hunneberg			477.7
						Varangu			481.3 *
						Pakerort			482.2 *
Cambrian	Furongian	Stage 10				Pakerort	Datsonian			485.4
										486.3 *
										486.5
							Payntonian			486.8 *
		Jiangshanian					Iverian			489.5
		Paibian					Idamean			494
	Miaolingian	Guzhangian					Mindyallan			Series 3 †	497
		Guzhangian					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					509
													510.8 *