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
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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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.

This timescale is used in the definition of 126762 collections

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International Chronostratigraphic Timescale			Cenozoic Subepochs	Carboniferous of China	Devonian of Czechoslovakia	Carbo-Permian of the Russian Platform	Permian of the Salt Range	Silurian of the Baltic
Quaternary	Holocene	Meghalayan							0
		Northgrippian							0.0042
		Greenlandian							0.0082
	Pleistocene	Late Pleistocene	Late Pleistocene						0.0117
		Chibanian	Middle Pleistocene						0.129
		Calabrian	Early Pleistocene						0.774
		Gelasian	Early Pleistocene						1.8
Neogene	Pliocene	Piacenzian	Late Pliocene						2.58
	Pliocene	Zanclean	Early Pliocene						3.6
	Miocene	Messinian	Late Miocene						5.333
		Tortonian	Late Miocene						7.246
		Serravallian	Middle Miocene						11.63
		Langhian	Middle Miocene						13.82
		Burdigalian	Early Miocene						15.98
		Aquitanian	Early Miocene						20.44
Paleogene	Oligocene	Chattian	Late Oligocene						23.03
	Oligocene	Rupelian	Early Oligocene						27.82
	Eocene	Priabonian	Late Eocene						33.9
		Bartonian	Middle Eocene						37.71
		Lutetian	Middle Eocene						41.2
		Ypresian	Early Eocene						47.8
	Paleocene	Thanetian	Late Paleocene						56
		Selandian	Middle Paleocene						59.2
		Danian	Early Paleocene						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		254.14
							Kalabagh		255 *
							Wargal		256 *
	Guadalupian	Capitanian							259.51
		Wordian							264.28
						Noginskian			264.9 *
					265.3 *
				Amb	266.1 *
		Roadian		Amb	266.9
		Roadian			270.7 *
	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
					Dalaun	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 *
					Huashibanian	Cheremshanian	318.5 *
						Prikamian	318.6 *
			Severokeltmian			319.9 *
			Lousuan		Krasnopolyanian	321.2 *
			Lousuan		Voznesenian	321.9 *
	Mississippian	Serpukhovian	Dewunian		Zapaltjubian	323.2
					Protvian	324.4 *
					Steshevian	326.8 *
					Tarusian	329 *
			Shangsian		Tarusian	330.8 *
		Visean			Venevian	330.9
					Mikhailovian	331.9 *
					Aleksinian	333.7 *
			Jiusian		Aleksinian	335 *
					Tulian	335.8 *
					Bobrikian	339.9 *
					Radaevkian	343.4 *
		Tournaisian	Tangbagouan		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				Srbsko	382.7
	Middle Devonian	Eifelian				Chotec	387.7
	Early Devonian	Emsian				Daleje/Zlichovian	393.3
		Pragian				Pragian	407.6
		Lochkovian				Lochkovian	410.8
Silurian	Pridoli						Ohesaare	419.2
	Pridoli						Kaugetuma	421.7 *
	Ludlow	Ludfordian					Kuressaare	423
		Ludfordian					Paadla	423.4 *
		Gorstian					Paadla	425.6
	Wenlock	Homerian					Rootsikula	427.4
		Homerian					Jaagarahu	429.2 *
		Sheinwoodian					Jaagarahu	430.5
		Sheinwoodian					Jaani	431.8 *
	Llandovery	Telychian					Jaani	433.4
		Telychian					Adavere	434 *
		Aeronian					Adavere	438.5
		Aeronian					Raikkula	439.4 *
		Rhuddanian					Raikkula	440.8
		Rhuddanian		Juuru			441.4 *
Ordovician	Late Ordovician	Hirnantian					443.8
		Katian					445.2
		Sandbian					453
	Middle Ordovician	Darriwilian					458.4
	Middle Ordovician	Dapingian					467.3
	Early Ordovician	Floian					470
	Early Ordovician	Tremadocian					477.7
Cambrian	Furongian	Stage 10					485.4
		Jiangshanian					489.5
		Paibian					494
	Miaolingian	Guzhangian					497
		Drumian					500.5
		Wuliuan					504.5
	Series 2	Stage 4					509
	Series 2	Stage 3					514
	Terreneuvian	Stage 2					521
	Terreneuvian	Fortunian					529
									538.8