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

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of Britain				Cambrian of China		Ordovician of the Baltic				Cambrian of Kazakhstan	Cambrian of North America		Cambrian Epochs
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian					Harju	Porkuni							443.8
		Katian		Rawtheyan						Pirgu							445.2
				Cautleyan													448.9 *
				Pusgillian													449.3 *
			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							458.4
										Lasnamagi							458.9 *
										Aseri							460.4 *
				Abereiddian/Early Llanvirn						Aseri							461.3 *
									Oeland	Kunda							462.9 *
										Kunda	Valaste †/Hunderum						464.3 *
										Volkhov		Langevoja †/Vaana/Saka					467.1 *
		Dapingian															467.3
			Arenig	Fennian													468.4 *
										Billingen							469.3 *
	Early Ordovician	Floian															470
											Latorp †						470.1 *
				Whitlandian													471.1 *
				Whitlandian						Hunneberg							473.7 *
				Moridunian													474.3 *
		Tremadocian	Tremadoc	Migneintian									Ungurian				477.7
				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