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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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.

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

This timescale is used in the definition of 126691 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of China			Ordovician of the Baltic				Permo-Triassic Subages of Eastern Europe	Carboniferous of China	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								Vokhmian				247.2
	Early Triassic	Induan								Vokhmian				251.2
Permian	Lopingian	Changhsingian												251.902
	Lopingian	Wuchiapingian								Late Vyatkian/Early Vyatkian			Longtanian †	254.14
	Guadalupian	Capitanian								Late Severodvinian/Early Severodvinian				259.51
		Wordian								Late Urzhumian/Early Urzhumian				264.28
		Roadian								Late Kazanian/Early Kazanian				266.9
	Cisuralian	Kungurian												273.01
		Artinskian												283.5
		Sakmarian												290.1
		Asselian												293.52
Carboniferous	Pennsylvanian	Gzhelian												298.9
		Gzhelian									Xiaodushanian			300 *
		Kasimovian									Xiaodushanian			303.7
		Kasimovian									Dalaun			305.8 *
		Moscovian												307
		Bashkirian												315.2
											Huashibanian			318.5 *
											Lousuan			321.2 *
	Mississippian	Serpukhovian	Dewunian	323.2
		Serpukhovian	Shangsian	330.8 *
		Visean	Shangsian	330.9
		Visean	Jiusian	335 *
		Tournaisian	Tangbagouan	346.7
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		Hirnantian	Xiaoxita †/Shikou	Wufeng †	Harju	Porkuni	443.8
		Katian		Chientangkiangian		Wufeng †		Pirgu	445.2
				Neichianshanian/Hanjiang				Pirgu	449.5
								Vormsi	449.6 *
								Nabala	Johvi †		450 *
							Viru	Rakvere			450.6 *
								Oandu			452 *
		Sandbian						Keila	Idavere †		453
								Haljala			453.9
								Kukruse			456.4 *
								Uhaku	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian		Darriwilian	Guniu †/Hulo			Uhaku			458.4
								Lasnamagi			458.9 *
								Aseri			460.4 *
							Oeland	Kunda			462.9 *
									Valaste †/Hunderum		464.3 *
					Hunjiang †	Dawan †/Daobaowan/Ningkuo					466.3 *
								Volkhov			Langevoja †/Vaana/Saka	467.1 *
		Dapingian		Dapingian				Volkhov				467.3
		Dapingian		Dapingian				Billingen				469.3 *
	Early Ordovician	Floian		Yiyangian								470
									Latorp †			470.1 *
								Hunneberg				473.7 *
		Tremadocian		Xinchangian								477.7
						Lianghekou †						477.9 *
								Varangu				481.3 *
								Pakerort				482.2 *
Cambrian	Furongian	Stage 10						Pakerort				485.4
												486.3 *
												486.5
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian								Series 3 †		497
		Drumian										500.5
		Wuliuan										Stage 5 †	504.5
														509