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	Cambrian of China		Cambrian of North America		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian									443.8
		Katian		Rawtheyan									445.2
				Cautleyan									448.9 *
				Pusgillian									449.3 *
			Caradoc	Streffordian	Onnian †								449.6 *
				Cheneyan									451.5 *
				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									458.4
		Darriwilian		Abereiddian/Early Llanvirn									461.3 *
		Dapingian		Abereiddian/Early Llanvirn									467.3
		Dapingian	Arenig	Fennian									468.4 *
	Early Ordovician	Floian		Fennian									470
				Whitlandian									471.1 *
				Moridunian									474.3 *
		Tremadocian	Tremadoc	Migneintian									477.7
			Tremadoc	Cressagian									480.8 *
													485 *
Cambrian	Furongian	Stage 10					Datsonian	Niuchehean	Taoyuanian †		Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
							Payntonian						486.8 *
							Payntonian			Sunwaptan			487.5
		Jiangshanian					Iverian	Jiangshanian		Sunwaptan			489.5
		Jiangshanian					Iverian	Jiangshanian		Steptoean			493 *
		Paibian					Idamean	Paibian					494
		Paibian					Idamean	Paibian	Waergangian †/Youshuanian				494.9 *
	Miaolingian	Guzhangian					Mindyallan	Guzhangian	Wangcunian †	Marjumian	Albertian †	Middle Cambrian	497
		Guzhangian					Boomerangian	Guzhangian					499
		Drumian					Undillan	Drumian					500.5
		Drumian					Floran	Drumian					503
		Wuliuan					Templetonian	Wuliuan/Taijangian		Topazan			504.5
							Templetonian			Delamaran			506.5
							Ordian						507.8 *
	Series 2	Stage 4					Ordian	Duyunian			Waucoban †	Early Cambrian	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