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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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	Cambrian of Britain		Cambrian of Kazakhstan	Cambrian of Siberia			Ordovician of the Baltic			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	Harju	Porkuni	443.8
		Katian		Pirgu	445.2
				Vormsi	449.6 *
				Nabala	Johvi †	450 *
			Viru	Rakvere		450.6 *
				Oandu		452 *
		Sandbian		Keila	Idavere †	453
				Haljala		453.9
				Kukruse		456.4 *
				Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian		Uhaku		458.4
				Lasnamagi		458.9 *
				Aseri		460.4 *
			Oeland	Kunda		462.9 *
				Kunda	Valaste †/Hunderum	464.3 *
				Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian		Volkhov			467.3
		Dapingian		Billingen			469.3 *
	Early Ordovician	Floian					470
					Latorp †		470.1 *
				Hunneberg			473.7 *
		Tremadocian		Hunneberg			Ungurian	477.7
				Varangu				481.3 *
				Pakerort				482.2 *
								Mansian †	483.55 *
Cambrian	Furongian	Stage 10			Late Cambrian		Merioneth	Dolgellian/Trempealeauan	Batyrbaian	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Datsonian	485.4
														486.3 *
														486.5
													Payntonian	486.8 *
								Festiniogian					Payntonian	489.2 *
		Jiangshanian											Iverian	489.5
									Aksaian	Aksaian				490.7 *
									Sakian	Sakian				492.2 *
								Maentwrogian						493.1 *
		Paibian											Idamean	494
		Paibian										Ensyan †/Maduan/Nganasanian	Idamean	494.7 *
	Miaolingian	Guzhangian			Middle Cambrian		St Davids		Ayusokkanian	Ayusokkanian			Mindyallan	Series 3 †	497
													Mindyallan		Arcadian	498.4
													Boomerangian			499
										Mayan/Menevian			Boomerangian			499.5
		Drumian							Zhanaarykian				Undillan			500.5
		Drumian							Tuesaian				Floran			503
		Wuliuan							Tuesaian	Amgan/Solvan			Templetonian			Stage 5 †	504.5
													Templetonian				505.3
													Ordian				507.8 *
	Series 2	Stage 4			Early Cambrian		Caerfai							Branchian			509
									Toyonian	Toyonian	Lenian †						510 *
									Toyonian	Toyonian							510.8 *
									Botomian	Botomian							512.5 *
		Stage 3							Botomian	Botomian							514
									Atdabanian	Atdabanian							515.6 *
									Atdabanian	Atdabanian				Placentian			517.1
	Terreneuvian	Stage 2							Tommotian	Tommotian							521
		Stage 2								Nemakit-Daldynian							525.5
		Fortunian								Nemakit-Daldynian	Manykaian †						529
																		538.8