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, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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
A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 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 126133 collections

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International Chronostratigraphic Timescale			Mesozoic Subages		Permian of the Salt Range	Permian Subages of Germany	Cambrian of Australia	Permo-Triassic Subages of Eastern Europe	Permian of Western Europe	Carbo-Permian of the Russian Platform
Quaternary	Holocene	Meghalayan									0
		Northgrippian									0.0042
		Greenlandian									0.0082
	Pleistocene	Late Pleistocene									0.0117
		Chibanian									0.129
		Calabrian									0.774
		Gelasian									1.8
Neogene	Pliocene	Piacenzian									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	Late Maastrichtian/Early Maastrichtian								66
		Campanian	Late Campanian/Middle Campanian/Early Campanian								72.1
		Santonian	Late Santonian/Middle Santonian/Early Santonian								83.6
		Coniacian	Late Coniacian/Middle Coniacian/Early Coniacian								86.3
		Turonian	Late Turonian/Middle Turonian/Early Turonian								89.8
		Cenomanian	Late Cenomanian/Middle Cenomanian/Early Cenomanian								93.9
	Early Cretaceous	Albian	Late Albian								100.5
			Middle Albian								106.2 *
			Early Albian								109.9 *
		Aptian	Late Aptian								113
		Aptian	Early Aptian								119.5 *
		Barremian	Late Barremian/Early Barremian								121.4
		Hauterivian	Late Hauterivian/Early Hauterivian								125.77
		Valanginian	Late Valanginian/Early Valanginian								132.6
		Berriasian	Late Berriasian								139.8
			Middle Berriasian								140.6 *
			Early Berriasian								142.7 *
Jurassic	Late Jurassic	Tithonian	Late Tithonian	Middle Tithonian							145
		Tithonian	Early Tithonian	Middle Tithonian							146.3 *
		Kimmeridgian	Late Kimmeridgian								149.2
		Kimmeridgian	Early Kimmeridgian								152.2 *
		Oxfordian	Late Oxfordian	Middle Oxfordian/Early Oxfordian							154.8
		Oxfordian		Middle Oxfordian/Early Oxfordian							157.9 *
	Middle Jurassic	Callovian	Late Callovian/Middle Callovian/Early Callovian								161.5
		Bathonian	Late Bathonian/Middle Bathonian/Early Bathonian								165.3
		Bajocian	Late Bajocian								168.2
		Bajocian	Early Bajocian								168.6 *
		Aalenian	Late Aalenian/Middle Aalenian/Early Aalenian								170.9
	Early Jurassic	Toarcian	Late Toarcian								174.7
			Middle Toarcian								180.4 *
			Early Toarcian								182.9 *
		Pliensbachian	Late Pliensbachian/Early Pliensbachian								184.2
		Sinemurian	Late Sinemurian/Early Sinemurian								192.9
		Hettangian	Late Hettangian/Middle Hettangian/Early Hettangian								199.5
Triassic	Late Triassic	Rhaetian									201.4
		Norian	Sevatian								208.5
			Alaunian								213.2 *
			Lacian								216.7 *
		Carnian	Tuvalian								227
		Carnian	Julian								233.4 *
	Middle Triassic	Ladinian	Longobardian		237
		Ladinian	Fassanian		239.7 *
		Anisian	Illyrian		242
			Pelsonian		243.8 *
			Bithynian		244.7 *
			Aegean		245.5 *
	Early Triassic	Olenekian	Spathian		Vokhmian	247.2
		Olenekian	Smithian			248.9 *
		Induan	Dienerian			251.2
			Griesbachian			251.4 *
			Griesbachian			Kathwai	251.5 *
Permian	Lopingian	Changhsingian			Buntsandstein	Kathwai		Melekhovian	251.902
									252.4 *
						Chhidru			252.9 *
		Wuchiapingian				Chhidru	Late Vyatkian/Early Vyatkian		Zechstein	254.14
						Kalabagh				255 *
						Wargal				256 *
	Guadalupian	Capitanian			Ohre/Aller		Late Severodvinian/Early Severodvinian		Rotliegendes	259.51
		Wordian			Leine		Late Urzhumian/Early Urzhumian			264.28
								Noginskian		264.9 *
										265.3 *
						Amb				266.1 *
		Roadian				Amb	Late Kazanian/Early Kazanian			266.9
		Roadian					Late Kazanian/Early Kazanian			270.7 *
	Cisuralian	Kungurian								273.01
		Kungurian						Pavlovoposadian		276.8 *
		Artinskian						Pavlovoposadian	Autunian	283.5
		Artinskian						Rusavkinian		287.6 *
		Sakmarian								290.1
		Asselian								293.52
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	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	Datsonian					485.4
		Stage 10	Payntonian					486.8 *
		Jiangshanian	Iverian		489.5
		Paibian	Idamean		494
	Miaolingian	Guzhangian	Mindyallan		497
			Mindyallan		Arcadian	498.4
			Boomerangian			499
		Drumian	Undillan			500.5
		Drumian	Floran			503
		Wuliuan	Templetonian			504.5
		Wuliuan	Ordian			507.8 *
	Series 2	Stage 4	Ordian		Branchian	509
		Stage 4				510.8 *
		Stage 3				514
		Stage 3			Placentian	517.1
	Terreneuvian	Stage 2				521
	Terreneuvian	Fortunian				529
											538.8