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 4546 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Cambrian of Britain		Ordovician of the Baltic				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 *
														485 *
Cambrian	Furongian	Stage 10					Merioneth	Dolgellian/Trempealeauan					Late Cambrian	485.4
														486.3 *
														486.5
								Festiniogian						489.2 *
		Jiangshanian						Festiniogian						489.5
		Jiangshanian						Maentwrogian						493.1 *
		Paibian						Maentwrogian						494
	Miaolingian	Guzhangian					St Davids						Middle Cambrian	497
		Drumian												500.5
		Wuliuan												504.5
	Series 2	Stage 4					Caerfai						Early Cambrian	509
	Series 2	Stage 3												514
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
														538.8