PBDB Timescale

Cambrian of Britain

The interval definitions in this timescale are derived from the following sources:

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
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

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 602 collections

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International Chronostratigraphic Timescale			Cambrian of Britain		Cambrian Epochs	Ordovician of North America					Cambrian of West Avalonia	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					Tulean							477.7
							Stairsian							480.3 *
							Skullrockian			Demingian †				482 *
Cambrian	Furongian	Stage 10	Merioneth	Dolgellian/Trempealeauan	Late Cambrian		Skullrockian					Niuchehean	Taoyuanian †	485.4
				Dolgellian/Trempealeauan										487.5
				Festiniogian										489.2 *
		Jiangshanian		Festiniogian								Jiangshanian		489.5
		Jiangshanian		Maentwrogian								Jiangshanian		493.1 *
		Paibian										Paibian		494
		Paibian										Paibian	Waergangian †/Youshuanian	494.9 *
	Miaolingian	Guzhangian	St Davids		Middle Cambrian							Guzhangian	Wangcunian †	497
		Guzhangian									Arcadian	Guzhangian		498.4
		Drumian										Drumian		500.5
		Wuliuan										Wuliuan/Taijangian		504.5
	Series 2	Stage 4	Caerfai		Early Cambrian						Branchian	Duyunian		509
		Stage 3									Branchian	Nangaoian		514
		Stage 3									Placentian	Nangaoian		517.1
	Terreneuvian	Stage 2										Meishucunian		521
		Fortunian										Meishucunian		529
		Fortunian										Jinnigian		530.7
														538.8