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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 of West Avalonia	Cambrian of North America		Ordovician of North America
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			Franconian †/Dresbachian/Millardan		Skullrockian				485.4
				Dolgellian/Trempealeauan		Sunwaptan							487.5
				Festiniogian									489.2 *
		Jiangshanian											489.5
						Steptoean							493 *
				Maentwrogian									493.1 *
		Paibian		Maentwrogian									494
	Miaolingian	Guzhangian	St Davids			Marjumian	Albertian †						497
		Guzhangian			Arcadian								498.4
		Drumian											500.5
		Wuliuan				Topazan							504.5
		Wuliuan				Delamaran							506.5
	Series 2	Stage 4	Caerfai		Branchian	Delamaran	Waucoban †						509
		Stage 4				Dyeran							511 *
		Stage 3				Dyeran							514
						Montezuman							514.8 *
					Placentian	Montezuman							517.1
						Begadean							519.9 *
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
													538.8