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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 Siberia			Cambrian of Kazakhstan	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
		Tremadocian	Ordovician 1	Ungurian	477.7
		Tremadocian	Ordovician 1	Ungurian	Mansian †	483.55 *
Cambrian	Furongian	Stage 10	Late Cambrian	Cambrian 5	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Batyrbaian	485.4
		Jiangshanian			Batyrbaian			Batyrbaian	489.5
					Aksaian			Aksaian	490.7 *
					Sakian			Sakian	492.2 *
		Paibian							494
		Paibian					Ensyan †/Maduan/Nganasanian		494.7 *
	Miaolingian	Guzhangian	Middle Cambrian	Cambrian 4	Ayusokkanian			Ayusokkanian	Series 3 †		497
		Guzhangian			Mayan/Menevian						499.5
		Drumian						Zhanaarykian			500.5
		Drumian						Tuesaian			503
		Wuliuan		Cambrian 3	Amgan/Solvan			Tuesaian		Stage 5 †	504.5
		Wuliuan								Stage 5 †	505.3
	Series 2	Stage 4	Early Cambrian								509
					Toyonian	Lenian †		Toyonian			510 *
					Botomian			Botomian			512.5 *
		Stage 3		Cambrian 2	Botomian			Botomian			514
		Stage 3			Atdabanian			Atdabanian			515.6 *
	Terreneuvian	Stage 2			Tommotian			Tommotian			521
		Stage 2			Nemakit-Daldynian						525.5
		Fortunian		Cambrian 1	Nemakit-Daldynian	Manykaian †					529
												538.8