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				Cambrian of Britain		Cambrian of Australia	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									Merioneth	Dolgellian/Trempealeauan	Datsonian				Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian	485.4
																					486.3 *
																					486.5
													Payntonian								486.8 *
												Festiniogian	Payntonian								489.2 *
		Jiangshanian											Iverian								489.5
																	Aksaian				490.7 *
																	Sakian				492.2 *
												Maentwrogian									493.1 *
		Paibian											Idamean								494
		Paibian											Idamean						Ensyan †/Maduan/Nganasanian		494.7 *
	Miaolingian	Guzhangian									St Davids		Mindyallan				Ayusokkanian			Middle Cambrian	497
													Boomerangian				Ayusokkanian				499
													Boomerangian				Mayan/Menevian				499.5
		Drumian											Undillan								500.5
		Drumian											Floran								503
		Wuliuan											Templetonian				Amgan/Solvan				504.5
		Wuliuan											Ordian								507.8 *
	Series 2	Stage 4									Caerfai									Early Cambrian	509
																	Toyonian	Lenian †			510 *
																	Toyonian				510.8 *
																	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