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

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 Ibero-Bohemia				Ordovician of the Baltic				Cambrian of Australia	Ordovician of China			Cambrian of North America		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Kosovian				Harju	Porkuni				Hirnantian	Xiaoxita †/Shikou	Wufeng †				443.8
		Katian		Rawtheyan			Kralodvorian	Bohdalec †				Pirgu				Chientangkiangian						445.2
				Cautleyan																		448.9 *
				Pusgillian																		449.3 *
				Pusgillian												Neichianshanian/Hanjiang						449.5
			Caradoc	Streffordian	Onnian †							Vormsi										449.6 *
							Berounian					Vormsi										449.7 *
												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 *
									Zahorany †/Vinice	Letna †												456.2 *
												Kukruse										456.4 *
				Aurelucian																		456.8 *
					Soudleyan †/Harnagian/Costonian																	457.4 *
												Uhaku	Aluoja †									457.5 *
								Liben †														458 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn												Darriwilian	Guniu †/Hulo					458.4
							Dobrotivian															458.5 *
							Dobrotivian					Lasnamagi										458.9 *
							Oretanian					Lasnamagi										459.7 *
												Aseri										460.4 *
				Abereiddian/Early Llanvirn																		461.3 *
								Sarka †														461.7 *
											Oeland	Kunda										462.9 *
													Valaste †/Hunderum									464.3 *
																	Hunjiang †	Dawan †/Daobaowan/Ningkuo				466.3 *
												Volkhov		Langevoja †/Vaana/Saka								467.1 *
		Dapingian						Klabava †								Dapingian						467.3
							Arenigian															468
			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			Tremadocian									Xinchangian						477.7
				Migneintian														Lianghekou †				477.9 *
				Cressagian																		480.8 *
												Varangu										481.3 *
												Pakerort										482.2 *
																						485 *
Cambrian	Furongian	Stage 10													Datsonian					Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
																						486.3 *
																						486.5
															Payntonian							486.8 *
															Payntonian				Sunwaptan			487.5
		Jiangshanian													Iverian				Sunwaptan			489.5
		Jiangshanian													Iverian				Steptoean			493 *
		Paibian													Idamean				Steptoean			494
	Miaolingian	Guzhangian													Mindyallan				Marjumian	Albertian †	Middle Cambrian	497
		Guzhangian													Boomerangian							499
		Drumian													Undillan							500.5
		Drumian													Floran							503
		Wuliuan													Templetonian				Topazan			504.5
															Templetonian				Delamaran			506.5
															Ordian							507.8 *
	Series 2	Stage 4													Ordian					Waucoban †	Early Cambrian	509
																						510.8 *
																			Dyeran			511 *
		Stage 3																	Dyeran			514
																			Montezuman			514.8 *
																			Begadean			519.9 *
	Terreneuvian	Stage 2																				521
	Terreneuvian	Fortunian																				529
																						538.8