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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 Siberia			Cambrian of China		Cambrian of Australia	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
				Cressagian										480.8 *
				Cressagian			Mansian †							483.55 *
							Mansian †							485 *
Cambrian	Furongian	Stage 10					Batyrbaian	Tavgian †	Ketyan †/Yurakian	Niuchehean	Taoyuanian †	Datsonian	Late Cambrian	485.4
		Stage 10								Niuchehean		Payntonian		486.8 *
		Jiangshanian								Jiangshanian		Iverian		489.5
							Aksaian							490.7 *
							Sakian							492.2 *
		Paibian								Paibian		Idamean		494
									Ensyan †/Maduan/Nganasanian					494.7 *
									Ensyan †/Maduan/Nganasanian		Waergangian †/Youshuanian			494.9 *
	Miaolingian	Guzhangian					Ayusokkanian			Guzhangian	Wangcunian †	Mindyallan	Middle Cambrian	497
							Ayusokkanian					Boomerangian		499
							Mayan/Menevian					Boomerangian		499.5
		Drumian								Drumian		Undillan		500.5
		Drumian								Drumian		Floran		503
		Wuliuan					Amgan/Solvan			Wuliuan/Taijangian		Templetonian		504.5
		Wuliuan								Wuliuan/Taijangian		Ordian		507.8 *
	Series 2	Stage 4								Duyunian			Early Cambrian	509
							Toyonian	Lenian †						510 *
							Toyonian							510.8 *
							Botomian							512.5 *
		Stage 3					Botomian			Nangaoian				514
		Stage 3					Atdabanian			Nangaoian				515.6 *
	Terreneuvian	Stage 2					Tommotian			Meishucunian				521
		Stage 2					Nemakit-Daldynian							525.5
		Fortunian						Manykaian †						529
		Fortunian						Manykaian †		Jinnigian				530.7
														538.8