PBDB Timescale

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
J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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.

Interval names marked with † are no longer in current use.

This timescale is used in the definition of 126973 collections

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International Chronostratigraphic Timescale			Cretaceous Subepochs	Obsolete Names for ICS Units			Cretaceous North American Land-Mammal Ages	Cambrian Epochs	Central Paratethys Stages	Permian of China	Carbo-Permian of the Russian Platform	Permian of Western Europe
Neogene	Pliocene	Piacenzian		Tertiary †									2.58
	Pliocene	Zanclean											3.6
	Miocene	Messinian											5.333
		Tortonian							Pannonian				7.246
		Serravallian							Sarmatian				11.63
		Serravallian							Badenian				12.8 *
		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				Lancian/Edmontonian						66
		Campanian					Judithian/Aquilan						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								Meishanian	Melekhovian		251.902
		Changhsingian								Baoqingian			253.4 *
		Wuchiapingian			Longtanian †					Laoshanian		Zechstein	254.14
		Wuchiapingian			Longtanian †					Laibinian		Zechstein	257.7 *
	Guadalupian	Capitanian								Lengwuan		Rotliegendes	259.51
		Wordian								Kuhfengian			264.28
		Wordian									Noginskian		264.9 *
		Roadian											266.9
	Cisuralian	Kungurian								Luodianian			273.01
		Kungurian									Pavlovoposadian		276.8 *
		Artinskian										Autunian	283.5
										Longlinian			285.4 *
											Rusavkinian		287.6 *
		Sakmarian											290.1
		Asselian								Zisongian			293.52
Carboniferous	Pennsylvanian	Gzhelian								Zisongian			298.9
		Gzhelian						300.1
		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		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		Late Cambrian	485.4
		Jiangshanian			489.5
		Paibian			494
	Miaolingian	Guzhangian		Series 3 †	Middle Cambrian		497
		Guzhangian					Arcadian	498.4
		Drumian						500.5
		Wuliuan						Stage 5 †	504.5
	Series 2	Stage 4					Early Cambrian	Branchian	509
		Stage 3						Branchian	514
		Stage 3						Placentian	517.1
	Terreneuvian	Stage 2				521
	Terreneuvian	Fortunian				529
													538.8