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				Ordovician of China			Cambrian of Siberia			Cambrian Epochs	Ordovician of Australia
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Kosovian				Hirnantian	Xiaoxita †/Shikou	Wufeng †					Bolindian	443.8
		Katian		Rawtheyan			Kralodvorian	Bohdalec †			Chientangkiangian								445.2
				Cautleyan															448.9 *
				Cautleyan														Eastonian	449 *
				Pusgillian															449.3 *
				Pusgillian							Neichianshanian/Hanjiang								449.5
			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	Guniu †/Hulo						Darriwilian	458.4
							Dobrotivian												458.5 *
							Oretanian												459.7 *
				Abereiddian/Early Llanvirn															461.3 *
								Sarka †											461.7 *
								Sarka †				Hunjiang †	Dawan †/Daobaowan/Ningkuo						466.3 *
		Dapingian						Klabava †			Dapingian							Yapeenian	467.3
							Arenigian												468
			Arenig	Fennian															468.4 *
																		Castlemainian	468.5 *
	Early Ordovician	Floian									Yiyangian							Chewtonian	470
				Whitlandian														Chewtonian	471.1 *
																		Bendigonian	471.8 *
																		Lancefieldian	473.5 *
				Moridunian															474.3 *
		Tremadocian	Tremadoc	Migneintian			Tremadocian				Xinchangian								477.7
				Migneintian									Lianghekou †						477.9 *
				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