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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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	Ordovician of Britain				Cambrian of China		Cambrian of Australia	Cambrian of North America
Ordovician	Late Ordovician	Hirnantian				Ashgill	Hirnantian								443.8
		Katian					Rawtheyan								445.2
							Cautleyan								448.9 *
							Pusgillian								449.3 *
						Caradoc	Streffordian	Onnian †							449.6 *
							Cheneyan								451.5 *
							Burrellian								452.7 *
		Sandbian													453
								Actonian †							453.2 *
								Marshbrookian †	Woolstonian †						454.2 *
								Longvillian †							455.2 *
							Aurelucian	Longvillian †							456.8 *
							Aurelucian	Soudleyan †/Harnagian/Costonian							457.4 *
	Middle Ordovician	Darriwilian				Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn								458.4
		Darriwilian					Abereiddian/Early Llanvirn								461.3 *
		Dapingian					Abereiddian/Early Llanvirn								467.3
		Dapingian				Arenig	Fennian								468.4 *
	Early Ordovician	Floian					Fennian								470
							Whitlandian								471.1 *
							Moridunian								474.3 *
		Tremadocian				Tremadoc	Migneintian								477.7
						Tremadoc	Cressagian								480.8 *
															485 *
Cambrian	Furongian	Stage 10	Merioneth	Dolgellian/Trempealeauan						Niuchehean	Taoyuanian †	Datsonian		Franconian †/Dresbachian/Millardan	485.4
												Payntonian			486.8 *
													Sunwaptan		487.5
				Festiniogian											489.2 *
		Jiangshanian								Jiangshanian		Iverian			489.5
													Steptoean		493 *
				Maentwrogian											493.1 *
		Paibian								Paibian		Idamean			494
		Paibian								Paibian	Waergangian †/Youshuanian	Idamean			494.9 *
	Miaolingian	Guzhangian	St Davids							Guzhangian	Wangcunian †	Mindyallan	Marjumian	Albertian †	497
					Arcadian							Mindyallan			498.4
												Boomerangian			499
		Drumian								Drumian		Undillan			500.5
		Drumian								Drumian		Floran			503
		Wuliuan								Wuliuan/Taijangian		Templetonian	Topazan		504.5
												Templetonian	Delamaran		506.5
												Ordian			507.8 *
	Series 2	Stage 4	Caerfai		Branchian					Duyunian		Ordian		Waucoban †	509
															510.8 *
													Dyeran		511 *
		Stage 3								Nangaoian			Dyeran		514
													Montezuman		514.8 *
					Placentian								Montezuman		517.1
													Begadean		519.9 *
	Terreneuvian	Stage 2								Meishucunian					521
		Fortunian								Meishucunian					529
		Fortunian								Jinnigian					530.7
															538.8