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 China		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	Niuchehean	Taoyuanian †	Datsonian							Batyrbaian	485.4
						Payntonian								486.8 *
						Payntonian								487.5
		Jiangshanian		Jiangshanian		Iverian								489.5
													Aksaian	490.7 *
													Sakian	492.2 *
		Paibian		Paibian		Idamean								494
		Paibian		Paibian	Waergangian †/Youshuanian	Idamean								494.9 *
	Miaolingian	Guzhangian	Middle Cambrian	Guzhangian	Wangcunian †	Mindyallan							Ayusokkanian	497
						Mindyallan	Arcadian							498.4
						Boomerangian								499
						Boomerangian								499.5
		Drumian		Drumian		Undillan							Zhanaarykian	500.5
		Drumian		Drumian		Floran							Tuesaian	503
		Wuliuan		Wuliuan/Taijangian		Templetonian							Tuesaian	504.5
						Templetonian								505.3
						Ordian								507.8 *
	Series 2	Stage 4	Early Cambrian	Duyunian			Branchian							509
													Toyonian	510 *
													Toyonian	510.8 *
													Botomian	512.5 *
		Stage 3		Nangaoian									Botomian	514
													Atdabanian	515.6 *
							Placentian						Atdabanian	517.1
	Terreneuvian	Stage 2		Meishucunian									Tommotian	521
		Stage 2												525.5
		Fortunian												529
		Fortunian		Jinnigian										530.7
														538.8