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

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 Siberia			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 *
							Mansian †																483.55 *
							Mansian †																485 *
Cambrian	Furongian	Stage 10					Batyrbaian	Tavgian †	Ketyan †/Yurakian	Niuchehean	Taoyuanian †								Batyrbaian		Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
																							486.3 *
																							486.5
																				Sunwaptan			487.5
		Jiangshanian								Jiangshanian													489.5
							Aksaian												Aksaian				490.7 *
							Sakian												Sakian				492.2 *
																				Steptoean			493 *
		Paibian								Paibian													494
									Ensyan †/Maduan/Nganasanian														494.7 *
									Ensyan †/Maduan/Nganasanian		Waergangian †/Youshuanian												494.9 *
	Miaolingian	Guzhangian					Ayusokkanian			Guzhangian	Wangcunian †								Ayusokkanian	Marjumian	Albertian †	Middle Cambrian	497
		Guzhangian					Mayan/Menevian			Guzhangian													499.5
		Drumian								Drumian									Zhanaarykian				500.5
		Drumian								Drumian									Tuesaian				503
		Wuliuan					Amgan/Solvan			Wuliuan/Taijangian									Tuesaian	Topazan			504.5
																				Topazan			505.3
																				Delamaran			506.5
	Series 2	Stage 4								Duyunian											Waucoban †	Early Cambrian	509
							Toyonian	Lenian †											Toyonian				510 *
							Toyonian												Toyonian	Dyeran			511 *
							Botomian												Botomian				512.5 *
		Stage 3								Nangaoian													514
																				Montezuman			514.8 *
							Atdabanian												Atdabanian	Montezuman			515.6 *
							Atdabanian												Atdabanian	Begadean			519.9 *
	Terreneuvian	Stage 2					Tommotian			Meishucunian									Tommotian				521
		Stage 2					Nemakit-Daldynian																525.5
		Fortunian						Manykaian †															529
		Fortunian						Manykaian †		Jinnigian													530.7
																							538.8