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 4548 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Cambrian of China		Cambrian of Australia	Cambrian of Kazakhstan	Ordovician of Ibero-Bohemia				Ordovician of China			Cambrian of Siberia			Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian							Kosovian				Hirnantian	Xiaoxita †/Shikou	Wufeng †					443.8
		Katian		Rawtheyan							Kralodvorian	Bohdalec †			Chientangkiangian							445.2
				Cautleyan																		448.9 *
				Pusgillian																		449.3 *
				Pusgillian											Neichianshanian/Hanjiang							449.5
			Caradoc	Streffordian	Onnian †																	449.6 *
				Streffordian							Berounian											449.7 *
				Cheneyan																		451.5 *
				Burrellian																		452.7 *
		Sandbian																				453
					Actonian †																	453.2 *
					Marshbrookian †	Woolstonian †																454.2 *
					Longvillian †																	455.2 *
													Zahorany †/Vinice	Letna †								456.2 *
				Aurelucian																		456.8 *
					Soudleyan †/Harnagian/Costonian																	457.4 *
					Soudleyan †/Harnagian/Costonian							Liben †										458 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn											Darriwilian	Guniu †/Hulo						458.4
											Dobrotivian											458.5 *
											Oretanian											459.7 *
				Abereiddian/Early Llanvirn																		461.3 *
												Sarka †										461.7 *
												Sarka †				Hunjiang †	Dawan †/Daobaowan/Ningkuo					466.3 *
		Dapingian										Klabava †			Dapingian							467.3
											Arenigian											468
			Arenig	Fennian																		468.4 *
	Early Ordovician	Floian		Fennian											Yiyangian							470
				Whitlandian																		471.1 *
				Moridunian																		474.3 *
		Tremadocian	Tremadoc	Migneintian						Ungurian	Tremadocian				Xinchangian							477.7
				Migneintian													Lianghekou †					477.9 *
				Cressagian																		480.8 *
				Cressagian														Mansian †				483.55 *
																		Mansian †				485 *
Cambrian	Furongian	Stage 10					Niuchehean	Taoyuanian †	Datsonian	Batyrbaian								Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian	485.4
		Stage 10					Niuchehean		Payntonian													486.8 *
		Jiangshanian					Jiangshanian		Iverian													489.5
										Aksaian								Aksaian				490.7 *
										Sakian								Sakian				492.2 *
		Paibian					Paibian		Idamean													494
																				Ensyan †/Maduan/Nganasanian		494.7 *
								Waergangian †/Youshuanian												Ensyan †/Maduan/Nganasanian		494.9 *
	Miaolingian	Guzhangian					Guzhangian	Wangcunian †	Mindyallan	Ayusokkanian								Ayusokkanian			Middle Cambrian	497
									Boomerangian	Ayusokkanian								Ayusokkanian				499
									Boomerangian									Mayan/Menevian				499.5
		Drumian					Drumian		Undillan	Zhanaarykian												500.5
		Drumian					Drumian		Floran	Tuesaian												503
		Wuliuan					Wuliuan/Taijangian		Templetonian	Tuesaian								Amgan/Solvan				504.5
									Templetonian													505.3
									Ordian													507.8 *
	Series 2	Stage 4					Duyunian														Early Cambrian	509
										Toyonian								Toyonian	Lenian †			510 *
										Toyonian								Toyonian				510.8 *
										Botomian								Botomian				512.5 *
		Stage 3					Nangaoian			Botomian								Botomian				514
		Stage 3					Nangaoian			Atdabanian								Atdabanian				515.6 *
	Terreneuvian	Stage 2					Meishucunian			Tommotian								Tommotian				521
		Stage 2																Nemakit-Daldynian				525.5
		Fortunian																	Manykaian †			529
		Fortunian					Jinnigian												Manykaian †			530.7
																						538.8