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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 Kazakhstan	Cambrian of China		Ordovician of Australia	Cambrian of Siberia			Cambrian Epochs
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			Ungurian								477.7
				Cressagian											480.8 *
										Warendian					482.8 *
											Mansian †				483.55 *
											Mansian †				485 *
Cambrian	Furongian	Stage 10					Batyrbaian	Niuchehean	Taoyuanian †		Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian	485.4
		Jiangshanian					Batyrbaian	Jiangshanian			Batyrbaian				489.5
							Aksaian				Aksaian				490.7 *
							Sakian				Sakian				492.2 *
		Paibian						Paibian							494
													Ensyan †/Maduan/Nganasanian		494.7 *
									Waergangian †/Youshuanian				Ensyan †/Maduan/Nganasanian		494.9 *
	Miaolingian	Guzhangian					Ayusokkanian	Guzhangian	Wangcunian †		Ayusokkanian			Middle Cambrian	497
		Guzhangian						Guzhangian			Mayan/Menevian				499.5
		Drumian					Zhanaarykian	Drumian							500.5
		Drumian					Tuesaian	Drumian							503
		Wuliuan					Tuesaian	Wuliuan/Taijangian			Amgan/Solvan				504.5
		Wuliuan						Wuliuan/Taijangian							505.3
	Series 2	Stage 4						Duyunian						Early Cambrian	509
							Toyonian				Toyonian	Lenian †			510 *
							Botomian				Botomian				512.5 *
		Stage 3					Botomian	Nangaoian			Botomian				514
		Stage 3					Atdabanian	Nangaoian			Atdabanian				515.6 *
	Terreneuvian	Stage 2					Tommotian	Meishucunian			Tommotian				521
		Stage 2									Nemakit-Daldynian				525.5
		Fortunian										Manykaian †			529
		Fortunian						Jinnigian				Manykaian †			530.7
															538.8