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

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of Ibero-Bohemia				Cambrian of Siberia			Cambrian Epochs	Ordovician of Australia
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Kosovian								Bolindian	443.8
		Katian		Rawtheyan			Kralodvorian	Bohdalec †								445.2
				Cautleyan												448.9 *
				Cautleyan											Eastonian	449 *
				Pusgillian												449.3 *
			Caradoc	Streffordian	Onnian †											449.6 *
				Streffordian			Berounian									449.7 *
				Cheneyan												451.5 *
				Cheneyan											Gisbornian	452 *
				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											Darriwilian	458.4
							Dobrotivian									458.5 *
							Oretanian									459.7 *
				Abereiddian/Early Llanvirn												461.3 *
								Sarka †								461.7 *
		Dapingian						Klabava †							Yapeenian	467.3
							Arenigian									468
			Arenig	Fennian												468.4 *
															Castlemainian	468.5 *
	Early Ordovician	Floian													Chewtonian	470
				Whitlandian											Chewtonian	471.1 *
															Bendigonian	471.8 *
															Lancefieldian	473.5 *
				Moridunian												474.3 *
		Tremadocian	Tremadoc	Migneintian			Tremadocian									477.7
				Cressagian												480.8 *
															Warendian	482.8 *
											Mansian †					483.55 *
											Mansian †					485 *
Cambrian	Furongian	Stage 10									Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian		485.4
		Jiangshanian									Batyrbaian					489.5
											Aksaian					490.7 *
											Sakian					492.2 *
		Paibian														494
		Paibian											Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian									Ayusokkanian			Middle Cambrian		497
		Guzhangian									Mayan/Menevian					499.5
		Drumian									Mayan/Menevian					500.5
		Wuliuan									Amgan/Solvan					504.5
	Series 2	Stage 4									Amgan/Solvan			Early Cambrian		509
											Toyonian	Lenian †				510 *
											Botomian					512.5 *
		Stage 3									Botomian					514
		Stage 3									Atdabanian					515.6 *
	Terreneuvian	Stage 2									Tommotian					521
		Stage 2									Nemakit-Daldynian					525.5
		Fortunian									Nemakit-Daldynian	Manykaian †				529
																538.8