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 Australia	Ordovician of the Baltic				Cambrian of China		Cambrian of Britain		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Bolindian	Harju	Porkuni								443.8
		Katian		Rawtheyan					Pirgu								445.2
				Cautleyan													448.9 *
				Cautleyan			Eastonian										449 *
				Pusgillian													449.3 *
			Caradoc	Streffordian	Onnian †				Vormsi								449.6 *
									Nabala	Johvi †							450 *
								Viru	Rakvere								450.6 *
				Cheneyan					Rakvere								451.5 *
				Cheneyan			Gisbornian		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			Darriwilian		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					Yapeenian										467.3
			Arenig	Fennian			Yapeenian										468.4 *
							Castlemainian										468.5 *
							Castlemainian		Billingen								469.3 *
	Early Ordovician	Floian					Chewtonian										470
										Latorp †							470.1 *
				Whitlandian													471.1 *
							Bendigonian										471.8 *
							Lancefieldian										473.5 *
									Hunneberg								473.7 *
				Moridunian													474.3 *
		Tremadocian	Tremadoc	Migneintian													477.7
				Cressagian													480.8 *
									Varangu								481.3 *
									Pakerort								482.2 *
							Warendian										482.8 *
							Warendian										485 *
Cambrian	Furongian	Stage 10										Niuchehean	Taoyuanian †	Merioneth	Dolgellian/Trempealeauan	Late Cambrian	485.4
																	486.3 *
																	486.5
															Festiniogian		489.2 *
		Jiangshanian										Jiangshanian			Festiniogian		489.5
		Jiangshanian										Jiangshanian			Maentwrogian		493.1 *
		Paibian										Paibian					494
		Paibian										Paibian	Waergangian †/Youshuanian				494.9 *
	Miaolingian	Guzhangian										Guzhangian	Wangcunian †	St Davids		Middle Cambrian	497
		Drumian										Drumian	Wangcunian †				500.5
		Wuliuan										Wuliuan/Taijangian					504.5
	Series 2	Stage 4										Duyunian		Caerfai		Early Cambrian	509
	Series 2	Stage 3										Nangaoian					514
	Terreneuvian	Stage 2										Meishucunian					521
		Fortunian										Meishucunian					529
		Fortunian										Jinnigian					530.7
																	538.8