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

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 Britain		Cambrian Epochs	Ordovician of Ibero-Bohemia				Ordovician of the Baltic				Cambrian of Australia	Ordovician of China			Cambrian of North America
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian						Kosovian				Harju	Porkuni				Hirnantian	Xiaoxita †/Shikou	Wufeng †			443.8
		Katian		Rawtheyan						Kralodvorian	Bohdalec †				Pirgu				Chientangkiangian					445.2
				Cautleyan																				448.9 *
				Pusgillian																				449.3 *
				Pusgillian															Neichianshanian/Hanjiang					449.5
			Caradoc	Streffordian	Onnian †										Vormsi									449.6 *
										Berounian					Vormsi									449.7 *
															Nabala	Johvi †								450 *
														Viru	Rakvere									450.6 *
				Cheneyan											Rakvere									451.5 *
				Cheneyan											Oandu									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				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 *
																Valaste †/Hunderum								464.3 *
																				Hunjiang †	Dawan †/Daobaowan/Ningkuo			466.3 *
															Volkhov		Langevoja †/Vaana/Saka							467.1 *
		Dapingian									Klabava †								Dapingian					467.3
										Arenigian														468
			Arenig	Fennian																				468.4 *
															Billingen									469.3 *
	Early Ordovician	Floian																	Yiyangian					470
																Latorp †								470.1 *
				Whitlandian																				471.1 *
				Whitlandian											Hunneberg									473.7 *
				Moridunian																				474.3 *
		Tremadocian	Tremadoc	Migneintian						Tremadocian									Xinchangian					477.7
				Migneintian																	Lianghekou †			477.9 *
				Cressagian																				480.8 *
															Varangu									481.3 *
															Pakerort									482.2 *
																								485 *
Cambrian	Furongian	Stage 10					Merioneth	Dolgellian/Trempealeauan	Late Cambrian									Datsonian					Franconian †/Dresbachian/Millardan	485.4
																								486.3 *
																								486.5
																		Payntonian						486.8 *
																						Sunwaptan		487.5
								Festiniogian																489.2 *
		Jiangshanian																Iverian						489.5
																						Steptoean		493 *
								Maentwrogian																493.1 *
		Paibian						Maentwrogian										Idamean						494
	Miaolingian	Guzhangian					St Davids		Middle Cambrian									Mindyallan				Marjumian	Albertian †	497
		Guzhangian																Boomerangian						499
		Drumian																Undillan						500.5
		Drumian																Floran						503
		Wuliuan																Templetonian				Topazan		504.5
																		Templetonian				Delamaran		506.5
																		Ordian						507.8 *
	Series 2	Stage 4					Caerfai		Early Cambrian									Ordian					Waucoban †	509
																								510.8 *
																						Dyeran		511 *
		Stage 3																				Dyeran		514
																						Montezuman		514.8 *
																						Begadean		519.9 *
	Terreneuvian	Stage 2																						521
	Terreneuvian	Fortunian																						529
																								538.8