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 Ibero-Bohemia				Ordovician of the Baltic				Cambrian of China		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Kosovian				Harju	Porkuni						443.8
		Katian		Rawtheyan			Kralodvorian	Bohdalec †				Pirgu						445.2
				Cautleyan														448.9 *
				Pusgillian														449.3 *
			Caradoc	Streffordian	Onnian †							Vormsi						449.6 *
							Berounian					Vormsi						449.7 *
												Nabala	Johvi †					450 *
											Viru	Rakvere						450.6 *
				Cheneyan								Rakvere						451.5 *
				Cheneyan								Oandu						452 *
				Burrellian								Oandu						452.7 *
		Sandbian										Keila	Idavere †					453
					Actonian †							Keila						453.2 *
					Actonian †							Haljala						453.9
					Marshbrookian †	Woolstonian †												454.2 *
					Longvillian †													455.2 *
									Zahorany †/Vinice	Letna †								456.2 *
												Kukruse						456.4 *
				Aurelucian														456.8 *
					Soudleyan †/Harnagian/Costonian													457.4 *
												Uhaku	Aluoja †					457.5 *
								Liben †										458 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn														458.4
							Dobrotivian											458.5 *
							Dobrotivian					Lasnamagi						458.9 *
							Oretanian					Lasnamagi						459.7 *
												Aseri						460.4 *
				Abereiddian/Early Llanvirn														461.3 *
								Sarka †										461.7 *
											Oeland	Kunda						462.9 *
												Kunda	Valaste †/Hunderum					464.3 *
												Volkhov		Langevoja †/Vaana/Saka				467.1 *
		Dapingian						Klabava †										467.3
							Arenigian											468
			Arenig	Fennian														468.4 *
												Billingen						469.3 *
	Early Ordovician	Floian																470
													Latorp †					470.1 *
				Whitlandian														471.1 *
				Whitlandian								Hunneberg						473.7 *
				Moridunian														474.3 *
		Tremadocian	Tremadoc	Migneintian			Tremadocian											477.7
				Cressagian														480.8 *
												Varangu						481.3 *
												Pakerort						482.2 *
																		485 *
Cambrian	Furongian	Stage 10													Niuchehean	Taoyuanian †	Late Cambrian	485.4
																		486.3 *
																		486.5
		Jiangshanian													Jiangshanian			489.5
		Paibian													Paibian			494
		Paibian													Paibian	Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian													Guzhangian	Wangcunian †	Middle Cambrian	497
		Drumian													Drumian	Wangcunian †		500.5
		Wuliuan													Wuliuan/Taijangian			504.5
	Series 2	Stage 4													Duyunian		Early Cambrian	509
	Series 2	Stage 3													Nangaoian			514
	Terreneuvian	Stage 2													Meishucunian			521
		Fortunian													Meishucunian			529
		Fortunian													Jinnigian			530.7
																		538.8