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 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												Batyrbaian		Franconian †/Dresbachian/Millardan	Late Cambrian	485.4
																		486.3 *
																		486.5
															Sunwaptan			487.5
		Jiangshanian																489.5
														Aksaian				490.7 *
														Sakian				492.2 *
															Steptoean			493 *
		Paibian													Steptoean			494
	Miaolingian	Guzhangian												Ayusokkanian	Marjumian	Albertian †	Middle Cambrian	497
		Guzhangian																499.5
		Drumian												Zhanaarykian				500.5
		Drumian												Tuesaian				503
		Wuliuan												Tuesaian	Topazan			504.5
															Topazan			505.3
															Delamaran			506.5
	Series 2	Stage 4														Waucoban †	Early Cambrian	509
														Toyonian				510 *
														Toyonian	Dyeran			511 *
														Botomian				512.5 *
		Stage 3																514
															Montezuman			514.8 *
														Atdabanian	Montezuman			515.6 *
														Atdabanian	Begadean			519.9 *
	Terreneuvian	Stage 2												Tommotian				521
		Stage 2																525.5
		Fortunian																529
																		538.8