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 4547 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of the Baltic				Cambrian of Australia	Ordovician of China			Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian			Harju	Porkuni				Hirnantian	Xiaoxita †/Shikou	Wufeng †		443.8
		Katian		Rawtheyan				Pirgu				Chientangkiangian				445.2
				Cautleyan												448.9 *
				Pusgillian												449.3 *
				Pusgillian								Neichianshanian/Hanjiang				449.5
			Caradoc	Streffordian	Onnian †			Vormsi								449.6 *
								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 *
								Kukruse								456.4 *
				Aurelucian												456.8 *
					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				Uhaku				Darriwilian	Guniu †/Hulo			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 *
								Billingen								469.3 *
	Early Ordovician	Floian										Yiyangian				470
									Latorp †							470.1 *
				Whitlandian												471.1 *
				Whitlandian				Hunneberg								473.7 *
				Moridunian												474.3 *
		Tremadocian	Tremadoc	Migneintian								Xinchangian				477.7
				Migneintian										Lianghekou †		477.9 *
				Cressagian												480.8 *
								Varangu								481.3 *
								Pakerort								482.2 *
																485 *
Cambrian	Furongian	Stage 10									Datsonian				Late Cambrian	485.4
																486.3 *
																486.5
											Payntonian					486.8 *
		Jiangshanian									Iverian					489.5
		Paibian									Idamean					494
	Miaolingian	Guzhangian									Mindyallan				Middle Cambrian	497
		Guzhangian									Boomerangian					499
		Drumian									Undillan					500.5
		Drumian									Floran					503
		Wuliuan									Templetonian					504.5
		Wuliuan									Ordian					507.8 *
	Series 2	Stage 4									Ordian				Early Cambrian	509
		Stage 4														510.8 *
		Stage 3														514
	Terreneuvian	Stage 2														521
	Terreneuvian	Fortunian														529
																538.8