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 Australia	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					Datsonian					Late Cambrian	485.4
													486.3 *
													486.5
							Payntonian						486.8 *
		Jiangshanian					Iverian						489.5
		Paibian					Idamean						494
	Miaolingian	Guzhangian					Mindyallan					Middle Cambrian	497
		Guzhangian					Boomerangian						499
		Drumian					Undillan						500.5
		Drumian					Floran						503
		Wuliuan					Templetonian						504.5
		Wuliuan					Ordian						507.8 *
	Series 2	Stage 4					Ordian					Early Cambrian	509
		Stage 4											510.8 *
		Stage 3											514
	Terreneuvian	Stage 2											521
	Terreneuvian	Fortunian											529
													538.8