PBDB Timescale

Ordovician of Britain

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

F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view

There are 14 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 4547 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of Ibero-Bohemia				Cambrian of Kazakhstan	Cambrian of Britain		Cambrian of Siberia			Cambrian of China		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Kosovian													443.8
		Katian		Rawtheyan			Kralodvorian	Bohdalec †												445.2
				Cautleyan																448.9 *
				Pusgillian																449.3 *
			Caradoc	Streffordian	Onnian †															449.6 *
				Streffordian			Berounian													449.7 *
				Cheneyan																451.5 *
				Burrellian																452.7 *
		Sandbian																		453
					Actonian †															453.2 *
					Marshbrookian †	Woolstonian †														454.2 *
					Longvillian †															455.2 *
									Zahorany †/Vinice	Letna †										456.2 *
				Aurelucian																456.8 *
					Soudleyan †/Harnagian/Costonian															457.4 *
					Soudleyan †/Harnagian/Costonian			Liben †												458 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn																458.4
							Dobrotivian													458.5 *
							Oretanian													459.7 *
				Abereiddian/Early Llanvirn																461.3 *
								Sarka †												461.7 *
		Dapingian						Klabava †												467.3
							Arenigian													468
			Arenig	Fennian																468.4 *
	Early Ordovician	Floian		Fennian																470
				Whitlandian																471.1 *
				Moridunian																474.3 *
		Tremadocian	Tremadoc	Migneintian			Tremadocian				Ungurian									477.7
				Cressagian																480.8 *
				Cressagian										Mansian †						483.55 *
														Mansian †						485 *
Cambrian	Furongian	Stage 10									Batyrbaian	Merioneth	Dolgellian/Trempealeauan	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Niuchehean	Taoyuanian †	Late Cambrian	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 *
																Ensyan †/Maduan/Nganasanian		Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian									Ayusokkanian	St Davids		Ayusokkanian			Guzhangian	Wangcunian †	Middle Cambrian	497
		Guzhangian												Mayan/Menevian			Guzhangian			499.5
		Drumian									Zhanaarykian						Drumian			500.5
		Drumian									Tuesaian						Drumian			503
		Wuliuan									Tuesaian			Amgan/Solvan			Wuliuan/Taijangian			504.5
		Wuliuan															Wuliuan/Taijangian			505.3
	Series 2	Stage 4										Caerfai					Duyunian		Early Cambrian	509
											Toyonian			Toyonian	Lenian †					510 *
											Botomian			Botomian						512.5 *
		Stage 3									Botomian			Botomian			Nangaoian			514
		Stage 3									Atdabanian			Atdabanian			Nangaoian			515.6 *
	Terreneuvian	Stage 2									Tommotian			Tommotian			Meishucunian			521
		Stage 2												Nemakit-Daldynian						525.5
		Fortunian													Manykaian †					529
		Fortunian													Manykaian †		Jinnigian			530.7
																				538.8