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 the Baltic				Ordovician of China			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 *
															485 *
Cambrian	Furongian	Stage 10												Late Cambrian	485.4
															486.3 *
															486.5
		Jiangshanian													489.5
		Paibian													494
	Miaolingian	Guzhangian												Middle Cambrian	497
		Drumian													500.5
		Wuliuan													504.5
	Series 2	Stage 4												Early Cambrian	509
	Series 2	Stage 3													514
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
															538.8