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				Ordovician of the Baltic				Ordovician of China			Cambrian of Siberia			Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Harju	Porkuni			Hirnantian	Xiaoxita †/Shikou	Wufeng †					443.8
		Katian		Rawtheyan				Pirgu			Chientangkiangian							445.2
				Cautleyan														448.9 *
				Pusgillian														449.3 *
				Pusgillian							Neichianshanian/Hanjiang							449.5
			Caradoc	Streffordian	Onnian †			Vormsi										449.6 *
								Nabala	Johvi †									450 *
							Viru	Rakvere										450.6 *
				Cheneyan				Rakvere										451.5 *
				Cheneyan				Oandu										452 *
				Burrellian				Oandu										452.7 *
		Sandbian						Keila	Idavere †									453
					Actonian †			Keila										453.2 *
					Actonian †			Haljala										453.9
					Marshbrookian †	Woolstonian †												454.2 *
					Longvillian †													455.2 *
								Kukruse										456.4 *
				Aurelucian														456.8 *
					Soudleyan †/Harnagian/Costonian													457.4 *
					Soudleyan †/Harnagian/Costonian			Uhaku	Aluoja †									457.5 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				Uhaku			Darriwilian	Guniu †/Hulo						458.4
								Lasnamagi										458.9 *
								Aseri										460.4 *
				Abereiddian/Early Llanvirn				Aseri										461.3 *
							Oeland	Kunda										462.9 *
									Valaste †/Hunderum									464.3 *
												Hunjiang †	Dawan †/Daobaowan/Ningkuo					466.3 *
								Volkhov		Langevoja †/Vaana/Saka								467.1 *
		Dapingian									Dapingian							467.3
			Arenig	Fennian														468.4 *
								Billingen										469.3 *
	Early Ordovician	Floian									Yiyangian							470
									Latorp †									470.1 *
				Whitlandian														471.1 *
				Whitlandian				Hunneberg										473.7 *
				Moridunian														474.3 *
		Tremadocian	Tremadoc	Migneintian							Xinchangian							477.7
				Migneintian									Lianghekou †					477.9 *
				Cressagian														480.8 *
								Varangu										481.3 *
								Pakerort										482.2 *
														Mansian †				483.55 *
														Mansian †				485 *
Cambrian	Furongian	Stage 10												Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian	485.4
																		486.3 *
																		486.5
		Jiangshanian																489.5
														Aksaian				490.7 *
														Sakian				492.2 *
		Paibian																494
		Paibian														Ensyan †/Maduan/Nganasanian		494.7 *
	Miaolingian	Guzhangian												Ayusokkanian			Middle Cambrian	497
		Guzhangian												Mayan/Menevian				499.5
		Drumian												Mayan/Menevian				500.5
		Wuliuan												Amgan/Solvan				504.5
	Series 2	Stage 4												Amgan/Solvan			Early Cambrian	509
														Toyonian	Lenian †			510 *
														Botomian				512.5 *
		Stage 3												Botomian				514
		Stage 3												Atdabanian				515.6 *
	Terreneuvian	Stage 2												Tommotian				521
		Stage 2												Nemakit-Daldynian				525.5
		Fortunian												Nemakit-Daldynian	Manykaian †			529
																		538.8