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
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	Ten Million Year Bins	Cambrian of West Avalonia	Cambrian of Britain		Cambrian of North America		Obsolete Names for ICS Units
Quaternary	Holocene	Meghalayan		Cenozoic 6									0
		Northgrippian											0.0042
		Greenlandian											0.0082
	Pleistocene	Late Pleistocene											0.0117
		Chibanian											0.129
		Calabrian											0.774
		Gelasian											1.8
Neogene	Pliocene	Piacenzian								Tertiary †			2.58
	Pliocene	Zanclean											3.6
	Miocene	Messinian											5.333
		Tortonian											7.246
		Serravallian		Cenozoic 5									11.63
		Langhian											13.82
		Burdigalian											15.98
		Aquitanian											20.44
Paleogene	Oligocene	Chattian		Cenozoic 4									23.03
	Oligocene	Rupelian		Cenozoic 4									27.82
	Eocene	Priabonian		Cenozoic 3									33.9
		Bartonian		Cenozoic 3									37.71
		Lutetian		Cenozoic 2									41.2
		Ypresian		Cenozoic 2									47.8
	Paleocene	Thanetian		Cenozoic 1									56
		Selandian											59.2
		Danian											61.6
Cretaceous	Late Cretaceous	Maastrichtian		Cretaceous 8									66
		Campanian		Cretaceous 7									72.1
		Santonian		Cretaceous 6									83.6
		Coniacian											86.3
		Turonian											89.8
		Cenomanian		Cretaceous 5									93.9
	Early Cretaceous	Albian		Cretaceous 4									100.5
		Aptian		Cretaceous 3									113
		Barremian		Cretaceous 2									121.4
		Hauterivian		Cretaceous 2									125.77
		Valanginian		Cretaceous 1									132.6
		Berriasian		Cretaceous 1									139.8
Jurassic	Late Jurassic	Tithonian		Jurassic 6									145
		Kimmeridgian		Jurassic 5									149.2
		Oxfordian											154.8
	Middle Jurassic	Callovian											161.5
		Bathonian		Jurassic 4									165.3
		Bajocian		Jurassic 4									168.2
		Aalenian		Jurassic 3									170.9
	Early Jurassic	Toarcian		Jurassic 3									174.7
		Pliensbachian		Jurassic 2									184.2
		Sinemurian		Jurassic 1									192.9
		Hettangian		Jurassic 1									199.5
Triassic	Late Triassic	Rhaetian		Triassic 4									201.4
		Norian		Triassic 4									208.5
		Carnian		Triassic 3									227
	Middle Triassic	Ladinian		Triassic 2									237
	Middle Triassic	Anisian		Triassic 2									242
	Early Triassic	Olenekian		Triassic 1									247.2
	Early Triassic	Induan		Triassic 1									251.2
Permian	Lopingian	Changhsingian		Permian 4									251.902
	Lopingian	Wuchiapingian									Longtanian †		254.14
	Guadalupian	Capitanian											259.51
		Wordian											264.28
		Roadian		Permian 3									266.9
	Cisuralian	Kungurian		Permian 2									273.01
		Artinskian											283.5
		Sakmarian											290.1
		Asselian		Permian 1									293.52
Carboniferous	Pennsylvanian	Gzhelian		Carboniferous 5									298.9
		Kasimovian	303.7	Carboniferous 5
		Moscovian	Carboniferous 4	307
		Bashkirian	Carboniferous 4	315.2
	Mississippian	Serpukhovian	Carboniferous 3	323.2
		Visean	Carboniferous 2	330.9
		Tournaisian	Carboniferous 1	346.7
Devonian	Late Devonian	Famennian	Devonian 5	358.9
	Late Devonian	Frasnian	Devonian 4	372.2
	Middle Devonian	Givetian	Devonian 3	382.7
	Middle Devonian	Eifelian	Devonian 3	387.7
	Early Devonian	Emsian	Devonian 2	393.3
		Pragian	Devonian 1	407.6
		Lochkovian	Devonian 1	410.8
Silurian	Pridoli		Silurian 2	419.2
	Ludlow	Ludfordian		423
	Ludlow	Gorstian		425.6
	Wenlock	Homerian		427.4
	Wenlock	Sheinwoodian		430.5
	Llandovery	Telychian	Silurian 1	433.4
		Aeronian		438.5
		Rhuddanian		440.8
Ordovician	Late Ordovician	Hirnantian	Ordovician 5	443.8
		Katian	Ordovician 5	445.2
		Sandbian	Ordovician 4	453
	Middle Ordovician	Darriwilian	Ordovician 3	458.4
	Middle Ordovician	Dapingian	Ordovician 2	467.3
	Early Ordovician	Floian	Ordovician 2	470
	Early Ordovician	Tremadocian	Ordovician 1	477.7
Cambrian	Furongian	Stage 10	Late Cambrian	Cambrian 5	Merioneth	Dolgellian/Trempealeauan	Franconian †/Dresbachian/Millardan	485.4
						Dolgellian/Trempealeauan		Sunwaptan	487.5
						Festiniogian			489.2 *
		Jiangshanian							489.5
								Steptoean	493 *
						Maentwrogian			493.1 *
		Paibian				Maentwrogian			494
	Miaolingian	Guzhangian	Middle Cambrian	Cambrian 4	St Davids		Marjumian	Albertian †	Series 3 †	497
		Guzhangian								Arcadian		498.4
		Drumian										500.5
		Wuliuan		Cambrian 3			Topazan				Stage 5 †	504.5
		Wuliuan					Delamaran				Stage 5 †	506.5
	Series 2	Stage 4	Early Cambrian		Branchian		Delamaran	Caerfai	Waucoban †			509
		Stage 4					Dyeran					511 *
		Stage 3		Cambrian 2			Dyeran					514
							Montezuman					514.8 *
					Placentian		Montezuman					517.1
							Begadean					519.9 *
	Terreneuvian	Stage 2										521
	Terreneuvian	Fortunian		Cambrian 1								529
													538.8