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				Cambrian of China		Cambrian of Australia	Ordovician of Ibero-Bohemia				Cambrian of North America		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian						Kosovian							443.8
		Katian		Rawtheyan						Kralodvorian	Bohdalec †						445.2
				Cautleyan													448.9 *
				Pusgillian													449.3 *
			Caradoc	Streffordian	Onnian †												449.6 *
				Streffordian						Berounian							449.7 *
				Cheneyan													451.5 *
				Burrellian													452.7 *
		Sandbian															453
					Actonian †												453.2 *
					Marshbrookian †	Woolstonian †											454.2 *
					Longvillian †												455.2 *
												Zahorany †/Vinice	Letna †				456.2 *
				Aurelucian													456.8 *
					Soudleyan †/Harnagian/Costonian												457.4 *
					Soudleyan †/Harnagian/Costonian						Liben †						458 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn													458.4
										Dobrotivian							458.5 *
										Oretanian							459.7 *
				Abereiddian/Early Llanvirn													461.3 *
											Sarka †						461.7 *
		Dapingian									Klabava †						467.3
										Arenigian							468
			Arenig	Fennian													468.4 *
	Early Ordovician	Floian		Fennian													470
				Whitlandian													471.1 *
				Moridunian													474.3 *
		Tremadocian	Tremadoc	Migneintian						Tremadocian							477.7
			Tremadoc	Cressagian													480.8 *
																	485 *
Cambrian	Furongian	Stage 10					Niuchehean	Taoyuanian †	Datsonian						Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
									Payntonian								486.8 *
									Payntonian					Sunwaptan			487.5
		Jiangshanian					Jiangshanian		Iverian					Sunwaptan			489.5
		Jiangshanian					Jiangshanian		Iverian					Steptoean			493 *
		Paibian					Paibian		Idamean								494
		Paibian					Paibian	Waergangian †/Youshuanian	Idamean								494.9 *
	Miaolingian	Guzhangian					Guzhangian	Wangcunian †	Mindyallan					Marjumian	Albertian †	Middle Cambrian	497
		Guzhangian					Guzhangian		Boomerangian								499
		Drumian					Drumian		Undillan								500.5
		Drumian					Drumian		Floran								503
		Wuliuan					Wuliuan/Taijangian		Templetonian					Topazan			504.5
									Templetonian					Delamaran			506.5
									Ordian								507.8 *
	Series 2	Stage 4					Duyunian		Ordian						Waucoban †	Early Cambrian	509
																	510.8 *
														Dyeran			511 *
		Stage 3					Nangaoian							Dyeran			514
														Montezuman			514.8 *
														Begadean			519.9 *
	Terreneuvian	Stage 2					Meishucunian										521
		Fortunian					Meishucunian										529
		Fortunian					Jinnigian										530.7
																	538.8