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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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 China		Cambrian of Siberia			Cambrian of Kazakhstan	Cambrian of North America		Ordovician of North America					Cambrian of Britain
Ordovician	Late Ordovician	Hirnantian										Cincinnatian	Gamachian						443.8
		Katian											Gamachian						445.2
													Richmondian						446 *
													Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian					449.8 *
													Edenian						450.4 *
												Mohawkian	Chatfieldian						451.1 *
		Sandbian											Chatfieldian						453
													Turinian						453.7 *
												Whiterockian		Canadian †	Chazyan †/Marmor				457 *
	Middle Ordovician	Darriwilian																	458.4
		Dapingian																	467.3
		Dapingian											Rangerian						469.1 *
	Early Ordovician	Floian										Ibexian	Blackhillsian		Jeffersonian †	Cassinian †			470
		Floian											Tulean						473.9 *
		Tremadocian							Ungurian				Tulean						477.7
													Stairsian						480.3 *
													Skullrockian			Demingian †			482 *
						Mansian †										Demingian †			483.55 *
Cambrian	Furongian	Stage 10	Late Cambrian	Niuchehean	Taoyuanian †	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Batyrbaian		Franconian †/Dresbachian/Millardan						Merioneth	Dolgellian/Trempealeauan	485.4
										Sunwaptan								Dolgellian/Trempealeauan	487.5
																		Festiniogian	489.2 *
		Jiangshanian		Jiangshanian															489.5
						Aksaian			Aksaian										490.7 *
						Sakian			Sakian										492.2 *
										Steptoean									493 *
																		Maentwrogian	493.1 *
		Paibian		Paibian															494
								Ensyan †/Maduan/Nganasanian											494.7 *
					Waergangian †/Youshuanian			Ensyan †/Maduan/Nganasanian											494.9 *
	Miaolingian	Guzhangian	Middle Cambrian	Guzhangian	Wangcunian †	Ayusokkanian			Ayusokkanian	Marjumian	Albertian †						St Davids		497
		Guzhangian		Guzhangian		Mayan/Menevian													499.5
		Drumian		Drumian					Zhanaarykian										500.5
		Drumian		Drumian					Tuesaian										503
		Wuliuan		Wuliuan/Taijangian		Amgan/Solvan			Tuesaian	Topazan									504.5
										Topazan									505.3
										Delamaran									506.5
	Series 2	Stage 4	Early Cambrian	Duyunian							Waucoban †						Caerfai		509
						Toyonian	Lenian †		Toyonian										510 *
						Toyonian			Toyonian	Dyeran									511 *
						Botomian			Botomian										512.5 *
		Stage 3		Nangaoian															514
										Montezuman									514.8 *
						Atdabanian			Atdabanian	Montezuman									515.6 *
						Atdabanian			Atdabanian	Begadean									519.9 *
	Terreneuvian	Stage 2		Meishucunian		Tommotian			Tommotian										521
		Stage 2				Nemakit-Daldynian													525.5
		Fortunian					Manykaian †												529
		Fortunian		Jinnigian			Manykaian †												530.7
																			538.8