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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 126138 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Cambrian of China		Devonian of France	Ordovician of Ibero-Bohemia				Ordovician of Britain				Ordovician of the Baltic				Carboniferous Subepochs	Carbo-Permian of the Russian Platform	Cambrian Epochs	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
	Lopingian	Wuchiapingian																				Longtanian †	254.14
	Guadalupian	Capitanian																					259.51
		Wordian																					264.28
		Wordian																	Noginskian				264.9 *
		Roadian																					266.9
	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																Late Pennsylvanian					298.9
		Kasimovian																	Dorogomilovian				303.7
																			Khamovnikian				304.8
																			Krevyakinian				305.8 *
		Moscovian																Middle Pennsylvanian	Myachkovian				307
			Podolskian	308.9 *
			Kashirian	311.4 *
			Vereian	313.8
			Melekessian	314.8
		Bashkirian	Melekessian	Early Pennsylvanian	315.2
			Cheremshanian		316.9 *
			Prikamian		318.6 *
			Severokeltmian		319.9 *
			Krasnopolyanian		321.2 *
			Voznesenian		321.9 *
	Mississippian	Serpukhovian	Late Mississippian	Zapaltjubian	323.2
				Protvian	324.4 *
				Steshevian	326.8 *
				Tarusian	329 *
		Visean	Middle Mississippian	Venevian	330.9
				Mikhailovian	331.9 *
				Aleksinian	333.7 *
				Tulian	335.8 *
				Bobrikian	339.9 *
				Radaevkian	343.4 *
		Tournaisian	Early Mississippian	Kosvian	346.7
				Kizelian	350.7 *
				Cherepetian	351.9 *
				Karakubian	354.4 *
				Upinian	356.3 *
				Malevkian	357.6 *
				Gumerovian	358 *
Devonian	Late Devonian	Famennian	Famennian			358.9
	Late Devonian	Frasnian	Frasnian			372.2
	Middle Devonian	Givetian	Givetian			382.7
	Middle Devonian	Eifelian	Couvinien			387.7
	Early Devonian	Emsian				393.3
		Pragian				407.6
		Pragian	Coblencien			408.2 *
		Lochkovian	Gedinnine			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				Kosovian	Ashgill	Hirnantian	Harju	Porkuni	443.8
		Katian				Kralodvorian		Bohdalec †		Rawtheyan	Pirgu	445.2
										Cautleyan		448.9 *
										Pusgillian		449.3 *
							Caradoc			Streffordian	Onnian †	Vormsi	449.6 *
						Berounian						Vormsi	449.7 *
												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 *
															Zahorany †/Vinice	Letna †	456.2 *
												Kukruse					456.4 *
										Aurelucian							456.8 *
											Soudleyan †/Harnagian/Costonian						457.4 *
												Uhaku	Aluoja †				457.5 *
								Liben †									458 *
	Middle Ordovician	Darriwilian					Llanvirn			Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn							458.4
						Dobrotivian											458.5 *
						Dobrotivian						Lasnamagi					458.9 *
						Oretanian						Lasnamagi					459.7 *
												Aseri					460.4 *
										Abereiddian/Early Llanvirn							461.3 *
								Sarka †									461.7 *
									Oeland			Kunda					462.9 *
												Kunda	Valaste †/Hunderum				464.3 *
												Volkhov					Langevoja †/Vaana/Saka	467.1 *
		Dapingian						Klabava †										467.3
						Arenigian												468
							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				Tremadocian		Tremadoc		Migneintian								477.7
										Cressagian								480.8 *
												Varangu						481.3 *
												Pakerort						482.2 *
																		485 *
Cambrian	Furongian	Stage 10				Niuchehean							Taoyuanian †							Late Cambrian	485.4
																					486.3 *
					486.5
		Jiangshanian			Jiangshanian	489.5
		Paibian			Paibian	494
		Paibian			Paibian	Waergangian †/Youshuanian			494.9 *
	Miaolingian	Guzhangian			Guzhangian	Wangcunian †			Middle Cambrian				Series 3 †							497
		Drumian			Drumian	Wangcunian †														500.5
		Wuliuan			Wuliuan/Taijangian															Stage 5 †	504.5
	Series 2	Stage 4			Duyunian				Early Cambrian												509
	Series 2	Stage 3	Nangaoian		514
	Terreneuvian	Stage 2	Meishucunian		521
		Fortunian	Meishucunian		529
		Fortunian	Jinnigian		530.7
																							538.8