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				Cambrian of China		Ordovician of China			Ordovician of the Baltic				Cambrian of Kazakhstan	Cambrian of North America		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian					Hirnantian	Xiaoxita †/Shikou	Wufeng †	Harju	Porkuni							443.8
		Katian		Rawtheyan					Chientangkiangian				Pirgu							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					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 *
													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							Ungurian				477.7
				Migneintian							Lianghekou †									477.9 *
				Cressagian																480.8 *
													Varangu							481.3 *
													Pakerort							482.2 *
																				485 *
Cambrian	Furongian	Stage 10					Niuchehean	Taoyuanian †								Batyrbaian		Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
																				486.3 *
																				486.5
																	Sunwaptan			487.5
		Jiangshanian					Jiangshanian													489.5
																Aksaian				490.7 *
																Sakian				492.2 *
																	Steptoean			493 *
		Paibian					Paibian													494
		Paibian					Paibian	Waergangian †/Youshuanian												494.9 *
	Miaolingian	Guzhangian					Guzhangian	Wangcunian †								Ayusokkanian	Marjumian	Albertian †	Middle Cambrian	497
		Guzhangian					Guzhangian													499.5
		Drumian					Drumian									Zhanaarykian				500.5
		Drumian					Drumian									Tuesaian				503
		Wuliuan					Wuliuan/Taijangian									Tuesaian	Topazan			504.5
																	Topazan			505.3
																	Delamaran			506.5
	Series 2	Stage 4					Duyunian											Waucoban †	Early Cambrian	509
																Toyonian				510 *
																Toyonian	Dyeran			511 *
																Botomian				512.5 *
		Stage 3					Nangaoian													514
																	Montezuman			514.8 *
																Atdabanian	Montezuman			515.6 *
																Atdabanian	Begadean			519.9 *
	Terreneuvian	Stage 2					Meishucunian									Tommotian				521
		Stage 2																		525.5
		Fortunian																		529
		Fortunian					Jinnigian													530.7
																				538.8