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				Cambrian of Kazakhstan	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			Ungurian	Tremadocian											477.7
				Cressagian															480.8 *
													Varangu						481.3 *
													Pakerort						482.2 *
																			485 *
Cambrian	Furongian	Stage 10					Batyrbaian									Niuchehean	Taoyuanian †	Late Cambrian	485.4
																			486.3 *
																			486.5
		Jiangshanian														Jiangshanian			489.5
							Aksaian												490.7 *
							Sakian												492.2 *
		Paibian														Paibian			494
		Paibian														Paibian	Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian					Ayusokkanian									Guzhangian	Wangcunian †	Middle Cambrian	497
		Guzhangian														Guzhangian			499.5
		Drumian					Zhanaarykian									Drumian			500.5
		Drumian					Tuesaian									Drumian			503
		Wuliuan					Tuesaian									Wuliuan/Taijangian			504.5
		Wuliuan														Wuliuan/Taijangian			505.3
	Series 2	Stage 4														Duyunian		Early Cambrian	509
							Toyonian												510 *
							Botomian												512.5 *
		Stage 3					Botomian									Nangaoian			514
		Stage 3					Atdabanian									Nangaoian			515.6 *
	Terreneuvian	Stage 2					Tommotian									Meishucunian			521
		Stage 2																	525.5
		Fortunian																	529
		Fortunian														Jinnigian			530.7
																			538.8