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
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 4547 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Cambrian of Siberia			Cambrian of Australia	Ordovician of Ibero-Bohemia				Ordovician of North America						Ordovician of the Baltic				Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian							Kosovian				Cincinnatian	Gamachian					Harju	Porkuni				443.8
		Katian		Rawtheyan							Kralodvorian	Bohdalec †				Gamachian						Pirgu				445.2
				Rawtheyan												Richmondian										446 *
				Cautleyan																						448.9 *
				Pusgillian																						449.3 *
			Caradoc	Streffordian	Onnian †																	Vormsi				449.6 *
											Berounian															449.7 *
																Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian									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 *
													Zahorany †/Vinice	Letna †												456.2 *
																						Kukruse				456.4 *
				Aurelucian																						456.8 *
															Whiterockian		Canadian †	Chazyan †/Marmor								457 *
					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																						458.4
											Dobrotivian															458.5 *
											Dobrotivian											Lasnamagi				458.9 *
											Oretanian											Lasnamagi				459.7 *
																						Aseri				460.4 *
				Abereiddian/Early Llanvirn																						461.3 *
												Sarka †														461.7 *
																					Oeland	Kunda				462.9 *
																						Kunda	Valaste †/Hunderum			464.3 *
																						Volkhov		Langevoja †/Vaana/Saka		467.1 *
		Dapingian										Klabava †														467.3
											Arenigian															468
			Arenig	Fennian																						468.4 *
																Rangerian										469.1 *
																Rangerian						Billingen				469.3 *
	Early Ordovician	Floian													Ibexian	Blackhillsian		Jeffersonian †	Cassinian †							470
																							Latorp †			470.1 *
				Whitlandian																						471.1 *
																						Hunneberg				473.7 *
																Tulean										473.9 *
				Moridunian																						474.3 *
		Tremadocian	Tremadoc	Migneintian							Tremadocian															477.7
				Migneintian												Stairsian										480.3 *
				Cressagian																						480.8 *
																						Varangu				481.3 *
																Skullrockian			Demingian †			Varangu				482 *
																						Pakerort				482.2 *
							Mansian †																			483.55 *
							Mansian †																			485 *
Cambrian	Furongian	Stage 10					Batyrbaian	Tavgian †	Ketyan †/Yurakian	Datsonian															Late Cambrian	485.4
																										486.3 *
																										486.5
										Payntonian																486.8 *
										Payntonian																487.5
		Jiangshanian								Iverian																489.5
							Aksaian																			490.7 *
							Sakian													492.2 *
		Paibian								Idamean										494
		Paibian							Ensyan †/Maduan/Nganasanian	Idamean										494.7 *
	Miaolingian	Guzhangian					Ayusokkanian			Mindyallan										Middle Cambrian					497
							Ayusokkanian			Boomerangian															499
							Mayan/Menevian			Boomerangian															499.5
		Drumian								Undillan															500.5
		Drumian								Floran															503
		Wuliuan					Amgan/Solvan			Templetonian															504.5
		Wuliuan								Ordian															507.8 *
	Series 2	Stage 4																		Early Cambrian					509
							Toyonian	Lenian †																	510 *
							Toyonian																		510.8 *
							Botomian																		512.5 *
		Stage 3					Botomian																		514
		Stage 3					Atdabanian																		515.6 *
	Terreneuvian	Stage 2					Tommotian																		521
		Stage 2					Nemakit-Daldynian																		525.5
		Fortunian					Nemakit-Daldynian	Manykaian †																	529
																										538.8