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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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		Cambrian of China		Cambrian of Siberia			Cambrian of Kazakhstan	Ordovician of Britain
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								Ungurian	Tremadoc	Migneintian			477.7
												Cressagian			480.8 *
							Mansian †					Cressagian			483.55 *
							Mansian †								485 *
Cambrian	Furongian	Stage 10	Merioneth	Dolgellian/Trempealeauan	Niuchehean	Taoyuanian †	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Batyrbaian					485.4
		Stage 10		Festiniogian	Niuchehean										489.2 *
		Jiangshanian			Jiangshanian										489.5
							Aksaian			Aksaian					490.7 *
							Sakian			Sakian					492.2 *
				Maentwrogian											493.1 *
		Paibian			Paibian										494
									Ensyan †/Maduan/Nganasanian						494.7 *
						Waergangian †/Youshuanian			Ensyan †/Maduan/Nganasanian						494.9 *
	Miaolingian	Guzhangian	St Davids		Guzhangian	Wangcunian †	Ayusokkanian			Ayusokkanian					497
		Guzhangian			Guzhangian		Mayan/Menevian								499.5
		Drumian			Drumian					Zhanaarykian					500.5
		Drumian			Drumian					Tuesaian					503
		Wuliuan			Wuliuan/Taijangian		Amgan/Solvan			Tuesaian					504.5
		Wuliuan			Wuliuan/Taijangian										505.3
	Series 2	Stage 4	Caerfai		Duyunian										509
							Toyonian	Lenian †		Toyonian					510 *
							Botomian			Botomian					512.5 *
		Stage 3			Nangaoian		Botomian			Botomian					514
		Stage 3			Nangaoian		Atdabanian			Atdabanian					515.6 *
	Terreneuvian	Stage 2			Meishucunian		Tommotian			Tommotian					521
		Stage 2					Nemakit-Daldynian								525.5
		Fortunian						Manykaian †							529
		Fortunian			Jinnigian			Manykaian †							530.7
															538.8