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 4547 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				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			Bolindian			Cincinnatian	Gamachian												443.8
		Katian		Rawtheyan							Gamachian												445.2
				Rawtheyan							Richmondian												446 *
				Cautleyan																			448.9 *
				Cautleyan			Eastonian																449 *
				Pusgillian																			449.3 *
			Caradoc	Streffordian	Onnian †																		449.6 *
											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 *
				Aurelucian																			456.8 *
										Whiterockian		Canadian †	Chazyan †/Marmor										457 *
					Soudleyan †/Harnagian/Costonian																		457.4 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Darriwilian																458.4
		Darriwilian		Abereiddian/Early Llanvirn			Darriwilian																461.3 *
		Dapingian		Abereiddian/Early Llanvirn			Yapeenian																467.3
			Arenig	Fennian			Yapeenian																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															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