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 Australia	Ordovician of Ibero-Bohemia				Ordovician of China			Ordovician of Australia	Cambrian of North America		Cambrian Epochs
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 *
				Cressagian											Warendian				482.8 *
															Warendian				485 *
Cambrian	Furongian	Stage 10					Datsonian										Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
							Payntonian												486.8 *
							Payntonian									Sunwaptan			487.5
		Jiangshanian					Iverian									Sunwaptan			489.5
		Jiangshanian					Iverian									Steptoean			493 *
		Paibian					Idamean									Steptoean			494
	Miaolingian	Guzhangian					Mindyallan									Marjumian	Albertian †	Middle Cambrian	497
		Guzhangian					Boomerangian												499
		Drumian					Undillan												500.5
		Drumian					Floran												503
		Wuliuan					Templetonian									Topazan			504.5
							Templetonian									Delamaran			506.5
							Ordian												507.8 *
	Series 2	Stage 4					Ordian										Waucoban †	Early Cambrian	509
																			510.8 *
																Dyeran			511 *
		Stage 3														Dyeran			514
																Montezuman			514.8 *
																Begadean			519.9 *
	Terreneuvian	Stage 2																	521
	Terreneuvian	Fortunian																	529
																			538.8