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 Australia	Cambrian of West Avalonia	Ordovician of North America					Cambrian of Kazakhstan
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				Ungurian	477.7
							Stairsian					480.3 *
							Skullrockian			Demingian †		482 *
Cambrian	Furongian	Stage 10	Late Cambrian	Datsonian							Batyrbaian	485.4
				Payntonian								486.8 *
				Payntonian								487.5
		Jiangshanian		Iverian								489.5
											Aksaian	490.7 *
											Sakian	492.2 *
		Paibian		Idamean							Sakian	494
	Miaolingian	Guzhangian	Middle Cambrian	Mindyallan							Ayusokkanian	497
				Mindyallan	Arcadian							498.4
				Boomerangian								499
				Boomerangian								499.5
		Drumian		Undillan							Zhanaarykian	500.5
		Drumian		Floran							Tuesaian	503
		Wuliuan		Templetonian							Tuesaian	504.5
				Templetonian								505.3
				Ordian								507.8 *
	Series 2	Stage 4	Early Cambrian		Branchian							509
											Toyonian	510 *
											Toyonian	510.8 *
											Botomian	512.5 *
		Stage 3									Botomian	514
											Atdabanian	515.6 *
					Placentian						Atdabanian	517.1
	Terreneuvian	Stage 2									Tommotian	521
		Stage 2										525.5
		Fortunian										529
												538.8