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
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 the Baltic				Cambrian Epochs	Ordovician of Australia
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Harju	Porkuni				Bolindian	443.8
		Katian		Rawtheyan				Pirgu					445.2
				Cautleyan									448.9 *
				Cautleyan								Eastonian	449 *
				Pusgillian									449.3 *
			Caradoc	Streffordian	Onnian †			Vormsi					449.6 *
								Nabala	Johvi †				450 *
							Viru	Rakvere					450.6 *
				Cheneyan				Rakvere					451.5 *
				Cheneyan				Oandu				Gisbornian	452 *
				Burrellian				Oandu					452.7 *
		Sandbian						Keila	Idavere †				453
					Actonian †			Keila					453.2 *
					Actonian †			Haljala					453.9
					Marshbrookian †	Woolstonian †							454.2 *
					Longvillian †								455.2 *
								Kukruse					456.4 *
				Aurelucian									456.8 *
					Soudleyan †/Harnagian/Costonian								457.4 *
					Soudleyan †/Harnagian/Costonian			Uhaku	Aluoja †				457.5 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				Uhaku				Darriwilian	458.4
								Lasnamagi					458.9 *
								Aseri					460.4 *
				Abereiddian/Early Llanvirn				Aseri					461.3 *
							Oeland	Kunda					462.9 *
								Kunda	Valaste †/Hunderum				464.3 *
								Volkhov		Langevoja †/Vaana/Saka			467.1 *
		Dapingian										Yapeenian	467.3
			Arenig	Fennian								Yapeenian	468.4 *
												Castlemainian	468.5 *
								Billingen				Castlemainian	469.3 *
	Early Ordovician	Floian										Chewtonian	470
									Latorp †				470.1 *
				Whitlandian									471.1 *
												Bendigonian	471.8 *
												Lancefieldian	473.5 *
								Hunneberg					473.7 *
				Moridunian									474.3 *
		Tremadocian	Tremadoc	Migneintian									477.7
				Cressagian									480.8 *
								Varangu					481.3 *
								Pakerort					482.2 *
												Warendian	482.8 *
												Warendian	485 *
Cambrian	Furongian	Stage 10									Late Cambrian		485.4
													486.3 *
													486.5
		Jiangshanian											489.5
		Paibian											494
	Miaolingian	Guzhangian									Middle Cambrian		497
		Drumian											500.5
		Wuliuan											504.5
	Series 2	Stage 4									Early Cambrian		509
	Series 2	Stage 3											514
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
													538.8