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				Ordovician of the Baltic				Cambrian of Australia	Cambrian of North America		Cambrian of Siberia			Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Harju	Porkuni										443.8
		Katian		Rawtheyan				Pirgu										445.2
				Cautleyan														448.9 *
				Pusgillian														449.3 *
			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										458.4
								Lasnamagi										458.9 *
								Aseri										460.4 *
				Abereiddian/Early Llanvirn				Aseri										461.3 *
							Oeland	Kunda										462.9 *
								Kunda	Valaste †/Hunderum									464.3 *
								Volkhov		Langevoja †/Vaana/Saka								467.1 *
		Dapingian																467.3
			Arenig	Fennian														468.4 *
								Billingen										469.3 *
	Early Ordovician	Floian																470
									Latorp †									470.1 *
				Whitlandian														471.1 *
				Whitlandian				Hunneberg										473.7 *
				Moridunian														474.3 *
		Tremadocian	Tremadoc	Migneintian														477.7
				Cressagian														480.8 *
								Varangu										481.3 *
								Pakerort										482.2 *
														Mansian †				483.55 *
														Mansian †				485 *
Cambrian	Furongian	Stage 10									Datsonian		Franconian †/Dresbachian/Millardan	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian	485.4
																		486.3 *
																		486.5
											Payntonian							486.8 *
											Payntonian	Sunwaptan						487.5
		Jiangshanian									Iverian							489.5
														Aksaian				490.7 *
														Sakian				492.2 *
												Steptoean						493 *
		Paibian									Idamean							494
		Paibian									Idamean					Ensyan †/Maduan/Nganasanian		494.7 *
	Miaolingian	Guzhangian									Mindyallan	Marjumian	Albertian †	Ayusokkanian			Middle Cambrian	497
											Boomerangian			Ayusokkanian				499
											Boomerangian			Mayan/Menevian				499.5
		Drumian									Undillan							500.5
		Drumian									Floran							503
		Wuliuan									Templetonian	Topazan		Amgan/Solvan				504.5
											Templetonian	Delamaran						506.5
											Ordian							507.8 *
	Series 2	Stage 4											Waucoban †				Early Cambrian	509
														Toyonian	Lenian †			510 *
																		510.8 *
												Dyeran						511 *
														Botomian				512.5 *
		Stage 3																514
												Montezuman						514.8 *
												Montezuman		Atdabanian				515.6 *
												Begadean		Atdabanian				519.9 *
	Terreneuvian	Stage 2												Tommotian				521
		Stage 2												Nemakit-Daldynian				525.5
		Fortunian												Nemakit-Daldynian	Manykaian †			529
																		538.8