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 126662 collections

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International Chronostratigraphic Timescale			Cambrian of Kazakhstan	Ordovician of Britain				Ordovician of the Baltic				Carbo-Permian of the Russian Platform	Permian of the Russian Platform		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
		Wuchiapingian														Longtanian †	254.14
		Wuchiapingian											Tatarian	Vyatkian		Longtanian †	256.8 *
	Guadalupian	Capitanian												Severodvinian			259.51
		Wordian												Urzhumian			264.28
		Wordian										Noginskian		Urzhumian			264.9 *
		Roadian											Kazanian	Povolzhian			266.9
		Roadian											Kazanian	Sokian			270.7 *
	Cisuralian	Kungurian											Kungurian	Irenian/Ufimian			273.01
														Filipovian			276.5 *
												Pavlovoposadian		Filipovian			276.8 *
														Saraninian			280.1 *
		Artinskian											Artinskian	Sarginian			283.5
														Irginian			285.9 *
												Rusavkinian		Irginian			287.6 *
														Burtsevian			287.8 *
		Sakmarian											Sakmarian	Sterlitamakian			290.1
		Sakmarian	Tastubian	291.7 *									Sakmarian
		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				Ashgill	Hirnantian	Harju	Porkuni	443.8
		Katian					Rawtheyan		Pirgu	445.2
							Cautleyan			448.9 *
							Pusgillian			449.3 *
						Caradoc	Streffordian		Onnian †	Vormsi	449.6 *
										Nabala	Johvi †	450 *
								Viru		Rakvere		450.6 *
							Cheneyan			Rakvere		451.5 *
							Cheneyan			Oandu		452 *
							Burrellian			Oandu		452.7 *
		Sandbian								Keila	Idavere †	453
									Actonian †	Keila		453.2 *
									Actonian †	Haljala		453.9
									Marshbrookian †			Woolstonian †	454.2 *
									Longvillian †				455.2 *
										Kukruse			456.4 *
							Aurelucian						456.8 *
			Soudleyan †/Harnagian/Costonian						457.4 *
			Soudleyan †/Harnagian/Costonian						Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian	Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Uhaku		458.4
									Lasnamagi		458.9 *
									Aseri		460.4 *
						Abereiddian/Early Llanvirn			Aseri		461.3 *
								Oeland	Kunda		462.9 *
									Kunda	Valaste †/Hunderum	464.3 *
									Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian										467.3
			Arenig			Fennian						468.4 *
									Billingen			469.3 *
	Early Ordovician	Floian										470
										Latorp †		470.1 *
						Whitlandian						471.1 *
						Whitlandian			Hunneberg			473.7 *
						Moridunian						474.3 *
		Tremadocian	Ungurian			Tremadoc						Migneintian	477.7
												Cressagian	480.8 *
									Varangu				481.3 *
									Pakerort				482.2 *
													485 *
Cambrian	Furongian	Stage 10	Batyrbaian										485.4
													486.3 *
													486.5
		Jiangshanian											489.5
			Aksaian										490.7 *
			Sakian										492.2 *
		Paibian	Sakian										494
	Miaolingian	Guzhangian	Ayusokkanian										Series 3 †	497
		Guzhangian												499.5
		Drumian	Zhanaarykian											500.5
		Drumian	Tuesaian		503
		Wuliuan	Tuesaian		Stage 5 †									504.5
		Wuliuan			Stage 5 †									505.3
	Series 2	Stage 4												509
			Toyonian											510 *
			Botomian											512.5 *
		Stage 3	Botomian											514
		Stage 3	Atdabanian											515.6 *
	Terreneuvian	Stage 2	Tommotian											521
																	525.5