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				Cambrian of Siberia			Cambrian of Kazakhstan	Ordovician of the Baltic				Cambrian of North America		Ordovician of China			Ordovician of Australia	Ordovician of Ibero-Bohemia				Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian							Harju	Porkuni					Hirnantian	Xiaoxita †/Shikou	Wufeng †	Bolindian	Kosovian					443.8
		Katian		Rawtheyan								Pirgu					Chientangkiangian				Kralodvorian	Bohdalec †				445.2
				Cautleyan																						448.9 *
				Cautleyan																Eastonian						449 *
				Pusgillian																						449.3 *
				Pusgillian													Neichianshanian/Hanjiang									449.5
			Caradoc	Streffordian	Onnian †							Vormsi														449.6 *
												Vormsi									Berounian					449.7 *
												Nabala	Johvi †													450 *
											Viru	Rakvere														450.6 *
				Cheneyan								Rakvere														451.5 *
				Cheneyan								Oandu								Gisbornian						452 *
				Burrellian								Oandu														452.7 *
		Sandbian										Keila	Idavere †													453
					Actonian †							Keila														453.2 *
					Actonian †							Haljala														453.9
					Marshbrookian †	Woolstonian †																				454.2 *
					Longvillian †																					455.2 *
																							Zahorany †/Vinice	Letna †		456.2 *
												Kukruse														456.4 *
				Aurelucian																						456.8 *
					Soudleyan †/Harnagian/Costonian																					457.4 *
												Uhaku	Aluoja †													457.5 *
																						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 *
												Lasnamagi									Dobrotivian					458.9 *
												Lasnamagi									Oretanian					459.7 *
												Aseri														460.4 *
				Abereiddian/Early Llanvirn																						461.3 *
																						Sarka †				461.7 *
											Oeland	Kunda														462.9 *
													Valaste †/Hunderum													464.3 *
																		Hunjiang †	Dawan †/Daobaowan/Ningkuo							466.3 *
												Volkhov		Langevoja †/Vaana/Saka												467.1 *
		Dapingian															Dapingian			Yapeenian		Klabava †				467.3
																					Arenigian					468
			Arenig	Fennian																						468.4 *
																				Castlemainian						468.5 *
												Billingen								Castlemainian						469.3 *
	Early Ordovician	Floian															Yiyangian			Chewtonian						470
													Latorp †													470.1 *
				Whitlandian																						471.1 *
																				Bendigonian						471.8 *
																				Lancefieldian						473.5 *
												Hunneberg														473.7 *
				Moridunian																						474.3 *
		Tremadocian	Tremadoc	Migneintian						Ungurian							Xinchangian				Tremadocian					477.7
				Migneintian															Lianghekou †							477.9 *
				Cressagian																						480.8 *
												Varangu														481.3 *
												Pakerort														482.2 *
																				Warendian						482.8 *
							Mansian †																			483.55 *
							Mansian †																			485 *
Cambrian	Furongian	Stage 10					Batyrbaian	Tavgian †	Ketyan †/Yurakian	Batyrbaian						Franconian †/Dresbachian/Millardan									Late Cambrian	485.4
																										486.3 *
																										486.5
															Sunwaptan											487.5
		Jiangshanian																								489.5
							Aksaian			Aksaian																490.7 *
							Sakian			Sakian																492.2 *
															Steptoean											493 *
		Paibian																								494
		Paibian							Ensyan †/Maduan/Nganasanian																	494.7 *
	Miaolingian	Guzhangian					Ayusokkanian			Ayusokkanian					Marjumian	Albertian †									Middle Cambrian	497
		Guzhangian					Mayan/Menevian																			499.5
		Drumian								Zhanaarykian																500.5
		Drumian								Tuesaian																503
		Wuliuan					Amgan/Solvan			Tuesaian					Topazan											504.5
															Topazan											505.3
															Delamaran											506.5
	Series 2	Stage 4														Waucoban †									Early Cambrian	509
							Toyonian	Lenian †		Toyonian																510 *
							Toyonian			Toyonian					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