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
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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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	Cambrian of Britain		Cambrian of Kazakhstan	Cambrian of North America		Cambrian of West Avalonia	Cambrian of Australia	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	443.8
		Katian	445.2
		Sandbian	453
	Middle Ordovician	Darriwilian	458.4
	Middle Ordovician	Dapingian	467.3
	Early Ordovician	Floian	470
	Early Ordovician	Tremadocian	Ungurian	477.7
Cambrian	Furongian	Stage 10	Late Cambrian	Merioneth	Dolgellian/Trempealeauan	Batyrbaian	Franconian †/Dresbachian/Millardan	Datsonian	485.4
								Payntonian	486.8 *
									Sunwaptan	487.5
					Festiniogian					489.2 *
		Jiangshanian						Iverian		489.5
						Aksaian				490.7 *
						Sakian				492.2 *
									Steptoean	493 *
					Maentwrogian					493.1 *
		Paibian			Maentwrogian			Idamean		494
	Miaolingian	Guzhangian	Middle Cambrian	St Davids		Ayusokkanian	Marjumian	Albertian †	Mindyallan	Series 3 †	497
									Mindyallan		Arcadian		498.4
									Boomerangian				499
									Boomerangian				499.5
		Drumian				Zhanaarykian			Undillan				500.5
		Drumian				Tuesaian			Floran				503
		Wuliuan				Tuesaian	Topazan		Templetonian			Stage 5 †	504.5
							Topazan						505.3
							Delamaran						506.5
									Ordian				507.8 *
	Series 2	Stage 4	Early Cambrian	Caerfai				Waucoban †		Branchian			509
						Toyonian							510 *
													510.8 *
							Dyeran						511 *
						Botomian							512.5 *
		Stage 3											514
							Montezuman						514.8 *
						Atdabanian							515.6 *
										Placentian			517.1
							Begadean						519.9 *
	Terreneuvian	Stage 2				Tommotian							521
		Stage 2											525.5
		Fortunian											529
														538.8