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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 view
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 Ibero-Bohemia				Ordovician of Australia	Cambrian of China		Ordovician of North America						Cambrian of Siberia			Cambrian of Kazakhstan	Cambrian of North America		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Kosovian				Bolindian			Cincinnatian	Gamachian												443.8
		Katian		Rawtheyan			Kralodvorian	Bohdalec †							Gamachian												445.2
				Rawtheyan											Richmondian												446 *
				Cautleyan																							448.9 *
				Cautleyan							Eastonian																449 *
				Pusgillian																							449.3 *
			Caradoc	Streffordian	Onnian †																						449.6 *
							Berounian																				449.7 *
															Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian											449.8 *
															Edenian												450.4 *
														Mohawkian	Chatfieldian												451.1 *
				Cheneyan																							451.5 *
				Cheneyan							Gisbornian																452 *
				Burrellian																							452.7 *
		Sandbian																									453
					Actonian †																						453.2 *
					Actonian †										Turinian												453.7 *
					Marshbrookian †	Woolstonian †																					454.2 *
					Longvillian †																						455.2 *
									Zahorany †/Vinice	Letna †																	456.2 *
				Aurelucian																							456.8 *
														Whiterockian		Canadian †	Chazyan †/Marmor										457 *
					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																458.4
							Dobrotivian																				458.5 *
							Oretanian																				459.7 *
				Abereiddian/Early Llanvirn																							461.3 *
								Sarka †																			461.7 *
		Dapingian						Klabava †			Yapeenian																467.3
							Arenigian																				468
			Arenig	Fennian																							468.4 *
											Castlemainian																468.5 *
											Castlemainian				Rangerian												469.1 *
	Early Ordovician	Floian									Chewtonian			Ibexian	Blackhillsian		Jeffersonian †	Cassinian †									470
				Whitlandian							Chewtonian																471.1 *
											Bendigonian																471.8 *
											Lancefieldian																473.5 *
															Tulean												473.9 *
				Moridunian																							474.3 *
		Tremadocian	Tremadoc	Migneintian			Tremadocian																Ungurian				477.7
				Migneintian											Stairsian												480.3 *
				Cressagian											Stairsian												480.8 *
															Skullrockian			Demingian †									482 *
											Warendian																482.8 *
																				Mansian †							483.55 *
																				Mansian †							485 *
Cambrian	Furongian	Stage 10										Niuchehean	Taoyuanian †							Batyrbaian	Tavgian †	Ketyan †/Yurakian	Batyrbaian		Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
		Stage 10										Niuchehean												Sunwaptan			487.5
		Jiangshanian										Jiangshanian															489.5
																				Aksaian			Aksaian				490.7 *
																				Sakian			Sakian				492.2 *
																								Steptoean			493 *
		Paibian										Paibian															494
																						Ensyan †/Maduan/Nganasanian					494.7 *
													Waergangian †/Youshuanian									Ensyan †/Maduan/Nganasanian					494.9 *
	Miaolingian	Guzhangian										Guzhangian	Wangcunian †							Ayusokkanian			Ayusokkanian	Marjumian	Albertian †	Middle Cambrian	497
		Guzhangian										Guzhangian								Mayan/Menevian							499.5
		Drumian										Drumian											Zhanaarykian				500.5
		Drumian										Drumian											Tuesaian				503
		Wuliuan										Wuliuan/Taijangian								Amgan/Solvan			Tuesaian	Topazan			504.5
																								Topazan			505.3
																								Delamaran			506.5
	Series 2	Stage 4										Duyunian													Waucoban †	Early Cambrian	509
																			Toyonian	Lenian †	Toyonian		510 *
																			Toyonian		Toyonian		Dyeran	511 *
																			Botomian		Botomian			512.5 *
		Stage 3										Nangaoian												514
																							Montezuman	514.8 *
																			Atdabanian		Atdabanian		Montezuman	515.6 *
																			Atdabanian		Atdabanian		Begadean	519.9 *
	Terreneuvian	Stage 2										Meishucunian							Tommotian		Tommotian			521
		Stage 2																	Nemakit-Daldynian					525.5
		Fortunian																		Manykaian †				529
		Fortunian										Jinnigian								Manykaian †				530.7
																											538.8