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
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
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

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 Kazakhstan	Ordovician of North America					Cambrian of China
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 *
Cambrian	Furongian	Stage 10	Late Cambrian	Batyrbaian		Skullrockian				Niuchehean	Taoyuanian †	485.4
		Stage 10								Niuchehean		487.5
		Jiangshanian								Jiangshanian		489.5
				Aksaian								490.7 *
				Sakian								492.2 *
		Paibian								Paibian		494
		Paibian								Paibian	Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian	Middle Cambrian	Ayusokkanian						Guzhangian	Wangcunian †	497
		Guzhangian								Guzhangian		499.5
		Drumian		Zhanaarykian						Drumian		500.5
		Drumian		Tuesaian						Drumian		503
		Wuliuan		Tuesaian						Wuliuan/Taijangian		504.5
		Wuliuan								Wuliuan/Taijangian		505.3
	Series 2	Stage 4	Early Cambrian							Duyunian		509
				Toyonian								510 *
				Botomian								512.5 *
		Stage 3		Botomian						Nangaoian		514
		Stage 3		Atdabanian						Nangaoian		515.6 *
	Terreneuvian	Stage 2		Tommotian						Meishucunian		521
		Stage 2										525.5
		Fortunian										529
		Fortunian								Jinnigian		530.7
												538.8