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		Ordovician of Australia	Ordovician of China			Cambrian of North America		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian					Bolindian	Hirnantian	Xiaoxita †/Shikou	Wufeng †				443.8
		Katian		Rawtheyan						Chientangkiangian						445.2
				Cautleyan												448.9 *
				Cautleyan					Eastonian							449 *
				Pusgillian												449.3 *
				Pusgillian						Neichianshanian/Hanjiang						449.5
			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	Darriwilian	Guniu †/Hulo					458.4
				Abereiddian/Early Llanvirn							Guniu †/Hulo					461.3 *
											Hunjiang †	Dawan †/Daobaowan/Ningkuo				466.3 *
		Dapingian							Yapeenian	Dapingian						467.3
			Arenig	Fennian					Yapeenian							468.4 *
									Castlemainian							468.5 *
	Early Ordovician	Floian							Chewtonian	Yiyangian						470
				Whitlandian					Chewtonian							471.1 *
									Bendigonian							471.8 *
									Lancefieldian							473.5 *
				Moridunian												474.3 *
		Tremadocian	Tremadoc	Migneintian						Xinchangian						477.7
				Migneintian								Lianghekou †				477.9 *
				Cressagian												480.8 *
				Cressagian					Warendian							482.8 *
									Warendian							485 *
Cambrian	Furongian	Stage 10					Niuchehean	Taoyuanian †						Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
		Stage 10					Niuchehean						Sunwaptan			487.5
		Jiangshanian					Jiangshanian						Sunwaptan			489.5
		Jiangshanian					Jiangshanian						Steptoean			493 *
		Paibian					Paibian									494
		Paibian					Paibian	Waergangian †/Youshuanian								494.9 *
	Miaolingian	Guzhangian					Guzhangian	Wangcunian †					Marjumian	Albertian †	Middle Cambrian	497
		Drumian					Drumian	Wangcunian †					Marjumian			500.5
		Wuliuan					Wuliuan/Taijangian						Topazan			504.5
		Wuliuan					Wuliuan/Taijangian						Delamaran			506.5
	Series 2	Stage 4					Duyunian						Delamaran	Waucoban †	Early Cambrian	509
		Stage 4					Duyunian						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