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

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 126689 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Devonian of France	Cenozoic Subepochs	Devonian of Eastern North America		Devonian of Czechoslovakia	Ordovician of Australia	Ordovician of the Baltic				Obsolete Names for ICS Units
Quaternary	Pleistocene	Late Pleistocene		Late Pleistocene											0.0117
		Chibanian		Middle Pleistocene											0.129
		Calabrian		Early Pleistocene											0.774
		Gelasian		Early Pleistocene											1.8
Neogene	Pliocene	Piacenzian		Late Pliocene									Tertiary †		2.58
	Pliocene	Zanclean		Early Pliocene											3.6
	Miocene	Messinian		Late Miocene											5.333
		Tortonian		Late Miocene											7.246
		Serravallian		Middle Miocene											11.63
		Langhian		Middle Miocene											13.82
		Burdigalian		Early Miocene											15.98
		Aquitanian		Early Miocene											20.44
Paleogene	Oligocene	Chattian		Late Oligocene											23.03
	Oligocene	Rupelian		Early Oligocene											27.82
	Eocene	Priabonian		Late Eocene											33.9
		Bartonian		Middle Eocene											37.71
		Lutetian		Middle Eocene											41.2
		Ypresian		Early Eocene											47.8
	Paleocene	Thanetian		Late Paleocene											56
		Selandian		Middle Paleocene											59.2
		Danian		Early Paleocene											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													251.902
	Lopingian	Wuchiapingian												Longtanian †	254.14
	Guadalupian	Capitanian													259.51
		Wordian													264.28
		Roadian													266.9
	Cisuralian	Kungurian													273.01
		Artinskian													283.5
		Sakmarian													290.1
		Asselian													293.52
Carboniferous	Pennsylvanian	Gzhelian													298.9
		Kasimovian													303.7
		Moscovian													307
		Bashkirian													315.2
	Mississippian	Serpukhovian	323.2
		Visean	330.9
		Tournaisian	346.7
Devonian	Late Devonian	Famennian	Famennian		Conewangan/Conneautan/Canadaway	358.9
	Late Devonian	Frasnian	Frasnian		West Fallsian/Sonyean	372.2
	Middle Devonian	Givetian	Givetian		Geneseean/Taghanican/Tioughniogan	Cazenovian	Srbsko	382.7
	Middle Devonian	Eifelian	Couvinien		Southwoodian	Cazenovian	Chotec	387.7
	Early Devonian	Emsian			Sawkillian/Deer Parkian	Helderbergian	Daleje/Zlichovian	393.3
		Pragian					Pragian	407.6
		Pragian	Coblencien				Pragian	408.2 *
		Lochkovian	Gedinnine				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						Bolindian	Harju	Porkuni	443.8
		Katian						Bolindian		Pirgu	445.2
				Eastonian				449 *		Pirgu
								Vormsi		449.6 *
								Nabala		Johvi †	450 *
								Viru	Rakvere		450.6 *
				Gisbornian					Oandu		452 *
		Sandbian							Keila	Idavere †	453
									Haljala		453.9
									Kukruse		456.4 *
									Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian		Darriwilian					Uhaku		458.4
									Lasnamagi		458.9 *
									Aseri		460.4 *
								Oeland	Kunda		462.9 *
									Kunda	Valaste †/Hunderum	464.3 *
									Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian		Yapeenian								467.3
				Castlemainian								468.5 *
				Castlemainian					Billingen			469.3 *
	Early Ordovician	Floian		Chewtonian								470
				Chewtonian						Latorp †		470.1 *
				Bendigonian								471.8 *
				Lancefieldian								473.5 *
									Hunneberg			473.7 *
		Tremadocian							Hunneberg			477.7
									Varangu			481.3 *
									Pakerort			482.2 *
				Warendian								482.8 *
Cambrian	Furongian	Stage 10										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