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 North America		Ordovician of Australia	Cambrian of China		Ordovician of Ibero-Bohemia				Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian					Bolindian			Kosovian					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							Yapeenian				Klabava †				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 *
				Cressagian					Warendian								482.8 *
									Warendian								485 *
Cambrian	Furongian	Stage 10						Franconian †/Dresbachian/Millardan		Niuchehean	Taoyuanian †					Late Cambrian	485.4
		Stage 10					Sunwaptan			Niuchehean							487.5
		Jiangshanian					Sunwaptan			Jiangshanian							489.5
		Jiangshanian					Steptoean			Jiangshanian							493 *
		Paibian								Paibian							494
		Paibian								Paibian	Waergangian †/Youshuanian						494.9 *
	Miaolingian	Guzhangian					Marjumian	Albertian †		Guzhangian	Wangcunian †					Middle Cambrian	497
		Drumian					Marjumian			Drumian	Wangcunian †						500.5
		Wuliuan					Topazan			Wuliuan/Taijangian							504.5
		Wuliuan					Delamaran			Wuliuan/Taijangian							506.5
	Series 2	Stage 4					Delamaran	Waucoban †		Duyunian						Early Cambrian	509
		Stage 4					Dyeran			Duyunian							511 *
		Stage 3					Dyeran			Nangaoian							514
							Montezuman										514.8 *
							Begadean										519.9 *
	Terreneuvian	Stage 2								Meishucunian							521
		Fortunian								Meishucunian							529
		Fortunian								Jinnigian							530.7
																	538.8