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 China		Cambrian Epochs	Cambrian of Australia	Ordovician of Australia	Cambrian of North America
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian							Bolindian			443.8
		Katian		Rawtheyan										445.2
				Cautleyan										448.9 *
				Cautleyan							Eastonian			449 *
				Pusgillian										449.3 *
			Caradoc	Streffordian	Onnian †									449.6 *
				Cheneyan										451.5 *
				Cheneyan							Gisbornian			452 *
				Burrellian										452.7 *
		Sandbian												453
					Actonian †									453.2 *
					Marshbrookian †	Woolstonian †								454.2 *
					Longvillian †									455.2 *
				Aurelucian	Longvillian †									456.8 *
				Aurelucian	Soudleyan †/Harnagian/Costonian									457.4 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn							Darriwilian			458.4
		Darriwilian		Abereiddian/Early Llanvirn							Darriwilian			461.3 *
		Dapingian		Abereiddian/Early Llanvirn							Yapeenian			467.3
			Arenig	Fennian							Yapeenian			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										477.7
				Cressagian										480.8 *
				Cressagian							Warendian			482.8 *
											Warendian			485 *
Cambrian	Furongian	Stage 10					Niuchehean	Taoyuanian †	Late Cambrian	Datsonian			Franconian †/Dresbachian/Millardan	485.4
										Payntonian				486.8 *
										Payntonian		Sunwaptan		487.5
		Jiangshanian					Jiangshanian			Iverian		Sunwaptan		489.5
		Jiangshanian					Jiangshanian			Iverian		Steptoean		493 *
		Paibian					Paibian			Idamean				494
		Paibian					Paibian	Waergangian †/Youshuanian		Idamean				494.9 *
	Miaolingian	Guzhangian					Guzhangian	Wangcunian †	Middle Cambrian	Mindyallan		Marjumian	Albertian †	497
		Guzhangian					Guzhangian			Boomerangian				499
		Drumian					Drumian			Undillan				500.5
		Drumian					Drumian			Floran				503
		Wuliuan					Wuliuan/Taijangian			Templetonian		Topazan		504.5
										Templetonian		Delamaran		506.5
										Ordian				507.8 *
	Series 2	Stage 4					Duyunian		Early Cambrian	Ordian			Waucoban †	509
														510.8 *
												Dyeran		511 *
		Stage 3					Nangaoian					Dyeran		514
												Montezuman		514.8 *
												Begadean		519.9 *
	Terreneuvian	Stage 2					Meishucunian							521
		Fortunian					Meishucunian							529
		Fortunian					Jinnigian							530.7
														538.8