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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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				Cambrian of Australia	Ordovician of the Baltic				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					Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian	485.4
																486.3 *
																486.5
							Payntonian									486.8 *
		Jiangshanian					Iverian									489.5
												Aksaian				490.7 *
												Sakian				492.2 *
		Paibian					Idamean									494
		Paibian					Idamean							Ensyan †/Maduan/Nganasanian		494.7 *
	Miaolingian	Guzhangian					Mindyallan					Ayusokkanian			Middle Cambrian	497
							Boomerangian					Ayusokkanian				499
							Boomerangian					Mayan/Menevian				499.5
		Drumian					Undillan									500.5
		Drumian					Floran									503
		Wuliuan					Templetonian					Amgan/Solvan				504.5
		Wuliuan					Ordian									507.8 *
	Series 2	Stage 4													Early Cambrian	509
												Toyonian	Lenian †			510 *
												Toyonian				510.8 *
												Botomian				512.5 *
		Stage 3										Botomian				514
		Stage 3										Atdabanian				515.6 *
	Terreneuvian	Stage 2										Tommotian				521
		Stage 2										Nemakit-Daldynian				525.5
		Fortunian										Nemakit-Daldynian	Manykaian †			529
																538.8