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				Cambrian Epochs	Cambrian of Australia	Ordovician of Australia	Cambrian of North America
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Kosovian						Bolindian			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						Klabava †					Yapeenian			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									Late Cambrian	Datsonian			Franconian †/Dresbachian/Millardan	485.4
												Payntonian				486.8 *
												Payntonian		Sunwaptan		487.5
		Jiangshanian										Iverian		Sunwaptan		489.5
		Jiangshanian										Iverian		Steptoean		493 *
		Paibian										Idamean		Steptoean		494
	Miaolingian	Guzhangian									Middle Cambrian	Mindyallan		Marjumian	Albertian †	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									Early Cambrian	Ordian			Waucoban †	509
																510.8 *
														Dyeran		511 *
		Stage 3												Dyeran		514
														Montezuman		514.8 *
														Begadean		519.9 *
	Terreneuvian	Stage 2														521
	Terreneuvian	Fortunian														529
																538.8