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	Cambrian of North America		Ten Million Year Bins	Cambrian of China		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	Franconian †/Dresbachian/Millardan	Cambrian 5	Niuchehean	Taoyuanian †	485.4
		Stage 10				Niuchehean		Sunwaptan	487.5
		Jiangshanian				Jiangshanian		Sunwaptan	489.5
		Jiangshanian				Jiangshanian		Steptoean	493 *
		Paibian				Paibian			494
		Paibian				Paibian	Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian	Middle Cambrian	Marjumian	Albertian †	Cambrian 4	Guzhangian	Wangcunian †	Series 3 †		497
		Drumian		Marjumian		Cambrian 4	Drumian	Wangcunian †			500.5
		Wuliuan		Topazan		Cambrian 3	Wuliuan/Taijangian			Stage 5 †	504.5
		Wuliuan		Delamaran			Wuliuan/Taijangian			Stage 5 †	506.5
	Series 2	Stage 4	Early Cambrian	Delamaran	Waucoban †		Duyunian				509
		Stage 4		Dyeran			Duyunian				511 *
		Stage 3		Dyeran		Cambrian 2	Nangaoian				514
				Montezuman							514.8 *
				Begadean							519.9 *
	Terreneuvian	Stage 2					Meishucunian				521
		Fortunian				Cambrian 1	Meishucunian				529
		Fortunian				Cambrian 1	Jinnigian				530.7
												538.8