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

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of Britain				Cambrian of Australia	Cambrian Epochs	Cambrian of China		Cambrian of North America
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian									443.8
		Katian		Rawtheyan									445.2
				Cautleyan									448.9 *
				Pusgillian									449.3 *
			Caradoc	Streffordian	Onnian †								449.6 *
				Cheneyan									451.5 *
				Burrellian									452.7 *
		Sandbian											453
					Actonian †								453.2 *
					Marshbrookian †	Woolstonian †							454.2 *
					Longvillian †								455.2 *
				Aurelucian	Longvillian †								456.8 *
				Aurelucian	Soudleyan †/Harnagian/Costonian								457.4 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn									458.4
		Darriwilian		Abereiddian/Early Llanvirn									461.3 *
		Dapingian		Abereiddian/Early Llanvirn									467.3
		Dapingian	Arenig	Fennian									468.4 *
	Early Ordovician	Floian		Fennian									470
				Whitlandian									471.1 *
				Moridunian									474.3 *
		Tremadocian	Tremadoc	Migneintian									477.7
			Tremadoc	Cressagian									480.8 *
													485 *
Cambrian	Furongian	Stage 10					Datsonian	Late Cambrian	Niuchehean	Taoyuanian †		Franconian †/Dresbachian/Millardan	485.4
							Payntonian						486.8 *
							Payntonian				Sunwaptan		487.5
		Jiangshanian					Iverian		Jiangshanian		Sunwaptan		489.5
		Jiangshanian					Iverian		Jiangshanian		Steptoean		493 *
		Paibian					Idamean		Paibian				494
		Paibian					Idamean		Paibian	Waergangian †/Youshuanian			494.9 *
	Miaolingian	Guzhangian					Mindyallan	Middle Cambrian	Guzhangian	Wangcunian †	Marjumian	Albertian †	497
		Guzhangian					Boomerangian		Guzhangian				499
		Drumian					Undillan		Drumian				500.5
		Drumian					Floran		Drumian				503
		Wuliuan					Templetonian		Wuliuan/Taijangian		Topazan		504.5
							Templetonian				Delamaran		506.5
							Ordian						507.8 *
	Series 2	Stage 4					Ordian	Early Cambrian	Duyunian			Waucoban †	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