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
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 126689 collections

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International Chronostratigraphic Timescale			Ordovician of China			Carbo-Permian of the Russian Platform	Permian of the Russian Platform		Permian of the Salt Range	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
		Induan										251.2
		Induan							Kathwai			251.5 *
Permian	Lopingian	Changhsingian				Melekhovian			Kathwai			251.902
												252.4 *
									Chhidru			252.9 *
		Wuchiapingian							Chhidru		Longtanian †	254.14
									Kalabagh			255 *
									Wargal			256 *
							Tatarian	Vyatkian				256.8 *
	Guadalupian	Capitanian						Severodvinian				259.51
		Wordian						Urzhumian				264.28
						Noginskian						264.9 *
												265.3 *
									Amb			266.1 *
		Roadian					Kazanian	Povolzhian	Amb			266.9
		Roadian					Kazanian	Sokian				270.7 *
	Cisuralian	Kungurian					Kungurian	Irenian/Ufimian				273.01
								Filipovian				276.5 *
			Pavlovoposadian	276.8 *				Filipovian
				Saraninian	280.1 *
		Artinskian		Artinskian	Sarginian	283.5
					Irginian	285.9 *
			Rusavkinian		Irginian	287.6 *
					Burtsevian	287.8 *
		Sakmarian		Sakmarian	Sterlitamakian	290.1
		Sakmarian		Sakmarian	Tastubian	291.7 *
		Asselian		Asselian	Shikhanian	293.52
					Uskalykian	294.8
					Surenian	297.5
Carboniferous	Pennsylvanian	Gzhelian				298.9
		Kasimovian	Dorogomilovian			303.7
			Khamovnikian			304.8
			Krevyakinian			305.8 *
		Moscovian	Myachkovian			307
			Podolskian			308.9 *
			Kashirian			311.4 *
			Vereian			313.8
			Melekessian			314.8
		Bashkirian	Melekessian			315.2
			Cheremshanian			316.9 *
			Prikamian			318.6 *
			Severokeltmian			319.9 *
			Krasnopolyanian			321.2 *
			Voznesenian			321.9 *
	Mississippian	Serpukhovian	Zapaltjubian			323.2
			Protvian			324.4 *
			Steshevian			326.8 *
			Tarusian			329 *
		Visean	Venevian			330.9
			Mikhailovian			331.9 *
			Aleksinian			333.7 *
			Tulian			335.8 *
			Bobrikian			339.9 *
			Radaevkian			343.4 *
		Tournaisian	Kosvian			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				Hirnantian	Xiaoxita †/Shikou	Wufeng †		443.8
		Katian				Chientangkiangian		Wufeng †		445.2
		Katian				Neichianshanian/Hanjiang				449.5
		Sandbian				Neichianshanian/Hanjiang			453
	Middle Ordovician	Darriwilian				Darriwilian	Guniu †/Hulo		458.4
		Darriwilian				Darriwilian	Hunjiang †	Dawan †/Daobaowan/Ningkuo	466.3 *
		Dapingian				Dapingian			467.3
	Early Ordovician	Floian				Yiyangian			470
		Tremadocian				Xinchangian			477.7
		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
												509