PBDB Timescale

Cambrian Epochs

The interval definitions in this timescale are derived from the following sources:

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
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
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are 12 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 594 collections

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International Chronostratigraphic Timescale			Cambrian Epochs	Ordovician of the Baltic				Ordovician of Britain				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													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													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	Harju	Porkuni	Ashgill	Hirnantian	443.8
		Katian		Pirgu		Rawtheyan	445.2
						Cautleyan	448.9 *
						Pusgillian	449.3 *
				Vormsi	Caradoc	Streffordian	Onnian †	449.6 *
				Nabala				Johvi †	450 *
			Viru	Rakvere					450.6 *
				Rakvere		Cheneyan			451.5 *
				Oandu		Cheneyan			452 *
				Oandu		Burrellian			452.7 *
		Sandbian		Keila				Idavere †	453
				Keila			Actonian †		453.2 *
				Haljala			Actonian †		453.9
							Marshbrookian †		Woolstonian †	454.2 *
							Longvillian †			455.2 *
				Kukruse						456.4 *
						Aurelucian				456.8 *
							Soudleyan †/Harnagian/Costonian			457.4 *
				Uhaku			Soudleyan †/Harnagian/Costonian	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian		Uhaku	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				458.4
				Lasnamagi						458.9 *
				Aseri						460.4 *
				Aseri		Abereiddian/Early Llanvirn				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 *
				Hunneberg		Whitlandian					473.7 *
						Moridunian					474.3 *
		Tremadocian			Tremadoc	Migneintian					477.7
						Cressagian					480.8 *
				Varangu							481.3 *
				Pakerort							482.2 *
											485 *
Cambrian	Furongian	Stage 10						Late Cambrian				485.4
												486.3 *
												486.5
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian						Middle Cambrian				Series 3 †	497
		Drumian											500.5
		Wuliuan											Stage 5 †	504.5
	Series 2	Stage 4						Early Cambrian						509
	Series 2	Stage 3												514
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
															538.8