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

Show more time

Show linear time

International Chronostratigraphic Timescale			Cambrian of Britain		Ordovician of the Baltic				Cambrian of West Avalonia	Cambrian of China
Ordovician	Late Ordovician	Hirnantian			Harju	Porkuni						443.8
		Katian				Pirgu						445.2
						Vormsi						449.6 *
						Nabala	Johvi †					450 *
					Viru	Rakvere						450.6 *
						Oandu						452 *
		Sandbian				Keila	Idavere †					453
						Haljala						453.9
						Kukruse						456.4 *
						Uhaku	Aluoja †					457.5 *
	Middle Ordovician	Darriwilian				Uhaku						458.4
						Lasnamagi						458.9 *
						Aseri						460.4 *
					Oeland	Kunda						462.9 *
						Kunda	Valaste †/Hunderum					464.3 *
						Volkhov		Langevoja †/Vaana/Saka				467.1 *
		Dapingian				Volkhov						467.3
		Dapingian				Billingen						469.3 *
	Early Ordovician	Floian										470
							Latorp †					470.1 *
						Hunneberg						473.7 *
		Tremadocian				Hunneberg						477.7
						Varangu						481.3 *
						Pakerort						482.2 *
Cambrian	Furongian	Stage 10	Merioneth	Dolgellian/Trempealeauan		Pakerort				Niuchehean	Taoyuanian †	485.4
												486.3 *
												486.5
				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							Guzhangian	Wangcunian †	497
		Guzhangian							Arcadian	Guzhangian		498.4
		Drumian								Drumian		500.5
		Wuliuan								Wuliuan/Taijangian		504.5
	Series 2	Stage 4	Caerfai						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