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	Ordovician of North America					Cambrian of West Avalonia	Cambrian of Australia
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			Tulean						477.7
					Stairsian						480.3 *
					Skullrockian			Demingian †			482 *
Cambrian	Furongian	Stage 10	Late Cambrian							Datsonian	485.4
										Payntonian	486.8 *
										Payntonian	487.5
		Jiangshanian								Iverian	489.5
		Paibian								Idamean	494
	Miaolingian	Guzhangian	Middle Cambrian							Mindyallan	497
									Arcadian	Mindyallan	498.4
										Boomerangian	499
		Drumian								Undillan	500.5
		Drumian								Floran	503
		Wuliuan								Templetonian	504.5
		Wuliuan								Ordian	507.8 *
	Series 2	Stage 4	Early Cambrian						Branchian	Ordian	509
		Stage 4									510.8 *
		Stage 3									514
		Stage 3							Placentian		517.1
	Terreneuvian	Stage 2									521
	Terreneuvian	Fortunian									529
											538.8