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
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

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 4546 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of China			Ordovician of North America					Ordovician of the Baltic
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Hirnantian	Xiaoxita †/Shikou	Wufeng †	Cincinnatian	Gamachian				Harju	Porkuni			443.8
		Katian		Rawtheyan			Chientangkiangian				Gamachian					Pirgu			445.2
				Rawtheyan							Richmondian								446 *
				Cautleyan															448.9 *
				Pusgillian															449.3 *
				Pusgillian			Neichianshanian/Hanjiang												449.5
			Caradoc	Streffordian	Onnian †											Vormsi			449.6 *
											Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian				Vormsi			449.8 *
											Maysvillian					Nabala	Johvi †		450 *
											Edenian					Nabala			450.4 *
											Edenian				Viru	Rakvere			450.6 *
										Mohawkian	Chatfieldian								451.1 *
				Cheneyan															451.5 *
				Cheneyan												Oandu			452 *
				Burrellian												Oandu			452.7 *
		Sandbian														Keila	Idavere †		453
					Actonian †														453.2 *
											Turinian								453.7 *
																Haljala			453.9
					Marshbrookian †	Woolstonian †													454.2 *
					Longvillian †														455.2 *
																Kukruse			456.4 *
				Aurelucian															456.8 *
										Whiterockian		Canadian †	Chazyan †/Marmor						457 *
					Soudleyan †/Harnagian/Costonian														457.4 *
					Soudleyan †/Harnagian/Costonian											Uhaku	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Darriwilian	Guniu †/Hulo								Uhaku			458.4
																Lasnamagi			458.9 *
																Aseri			460.4 *
				Abereiddian/Early Llanvirn												Aseri			461.3 *
															Oeland	Kunda			462.9 *
																	Valaste †/Hunderum		464.3 *
								Hunjiang †	Dawan †/Daobaowan/Ningkuo										466.3 *
																Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian					Dapingian												467.3
			Arenig	Fennian															468.4 *
											Rangerian								469.1 *
											Rangerian					Billingen			469.3 *
	Early Ordovician	Floian					Yiyangian			Ibexian	Blackhillsian		Jeffersonian †	Cassinian †					470
																	Latorp †		470.1 *
				Whitlandian															471.1 *
																Hunneberg			473.7 *
											Tulean								473.9 *
				Moridunian															474.3 *
		Tremadocian	Tremadoc	Migneintian			Xinchangian												477.7
									Lianghekou †										477.9 *
											Stairsian								480.3 *
				Cressagian															480.8 *
																Varangu			481.3 *
											Skullrockian			Demingian †		Varangu			482 *
																Pakerort			482.2 *
																			485 *
Cambrian	Furongian	Stage 10																	485.4
																			486.3 *
																			486.5
																			487.5