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 4548 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of China			Ordovician of Ibero-Bohemia				Cambrian of Kazakhstan	Cambrian of Siberia			Cambrian Epochs	Cambrian of Australia	Ordovician of Australia	Cambrian of North America
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Hirnantian	Xiaoxita †/Shikou	Wufeng †	Kosovian										Bolindian			443.8
		Katian		Rawtheyan			Chientangkiangian			Kralodvorian	Bohdalec †												445.2
				Cautleyan																			448.9 *
				Cautleyan																Eastonian			449 *
				Pusgillian																			449.3 *
				Pusgillian			Neichianshanian/Hanjiang																449.5
			Caradoc	Streffordian	Onnian †																		449.6 *
				Streffordian						Berounian													449.7 *
				Cheneyan																			451.5 *
				Cheneyan																Gisbornian			452 *
				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			Darriwilian	Guniu †/Hulo												Darriwilian			458.4
										Dobrotivian													458.5 *
										Oretanian													459.7 *
				Abereiddian/Early Llanvirn																			461.3 *
											Sarka †												461.7 *
								Hunjiang †	Dawan †/Daobaowan/Ningkuo		Sarka †												466.3 *
		Dapingian					Dapingian				Klabava †									Yapeenian			467.3
										Arenigian													468
			Arenig	Fennian																			468.4 *
																				Castlemainian			468.5 *
	Early Ordovician	Floian					Yiyangian													Chewtonian			470
				Whitlandian																Chewtonian			471.1 *
																				Bendigonian			471.8 *
																				Lancefieldian			473.5 *
				Moridunian																			474.3 *
		Tremadocian	Tremadoc	Migneintian			Xinchangian			Tremadocian				Ungurian									477.7
				Migneintian					Lianghekou †														477.9 *
				Cressagian																			480.8 *
																				Warendian			482.8 *
															Mansian †								483.55 *
															Mansian †								485 *
Cambrian	Furongian	Stage 10												Batyrbaian	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Late Cambrian	Datsonian			Franconian †/Dresbachian/Millardan	485.4
																			Payntonian				486.8 *
																			Payntonian		Sunwaptan		487.5
		Jiangshanian																	Iverian				489.5
														Aksaian	Aksaian								490.7 *
														Sakian	Sakian								492.2 *
																					Steptoean		493 *
		Paibian																	Idamean				494
		Paibian															Ensyan †/Maduan/Nganasanian		Idamean				494.7 *
	Miaolingian	Guzhangian												Ayusokkanian	Ayusokkanian			Middle Cambrian	Mindyallan		Marjumian	Albertian †	497
														Ayusokkanian	Ayusokkanian				Boomerangian				499
															Mayan/Menevian				Boomerangian				499.5
		Drumian												Zhanaarykian					Undillan				500.5
		Drumian												Tuesaian					Floran				503
		Wuliuan												Tuesaian	Amgan/Solvan				Templetonian		Topazan		504.5
																					Topazan		505.3
																					Delamaran		506.5
																			Ordian				507.8 *
	Series 2	Stage 4																Early Cambrian				Waucoban †	509
														Toyonian	Toyonian	Lenian †							510 *
																							510.8 *
																					Dyeran		511 *
														Botomian	Botomian								512.5 *
		Stage 3																					514
																					Montezuman		514.8 *
														Atdabanian	Atdabanian						Montezuman		515.6 *
														Atdabanian	Atdabanian						Begadean		519.9 *
	Terreneuvian	Stage 2												Tommotian	Tommotian								521
		Stage 2													Nemakit-Daldynian								525.5
		Fortunian													Nemakit-Daldynian	Manykaian †							529
																							538.8