PBDB Timescale

Ordovician of China

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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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
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 9 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 98 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of China			Cambrian of Kazakhstan	Ordovician of Britain				Ordovician of Australia	Cambrian of Siberia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †		Ashgill	Hirnantian			Bolindian				443.8
		Katian	Chientangkiangian					Rawtheyan							445.2
								Cautleyan							448.9 *
								Cautleyan			Eastonian				449 *
								Pusgillian							449.3 *
			Neichianshanian/Hanjiang					Pusgillian							449.5
							Caradoc	Streffordian	Onnian †						449.6 *
								Cheneyan							451.5 *
								Cheneyan			Gisbornian				452 *
								Burrellian							452.7 *
		Sandbian													453
									Actonian †						453.2 *
									Marshbrookian †	Woolstonian †					454.2 *
									Longvillian †						455.2 *
								Aurelucian	Longvillian †						456.8 *
								Aurelucian	Soudleyan †/Harnagian/Costonian						457.4 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo			Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Darriwilian				458.4
				Guniu †/Hulo				Abereiddian/Early Llanvirn							461.3 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo										466.3 *
		Dapingian	Dapingian								Yapeenian				467.3
							Arenig	Fennian			Yapeenian				468.4 *
											Castlemainian				468.5 *
	Early Ordovician	Floian	Yiyangian								Chewtonian				470
								Whitlandian			Chewtonian				471.1 *
											Bendigonian				471.8 *
											Lancefieldian				473.5 *
								Moridunian							474.3 *
		Tremadocian	Xinchangian			Ungurian	Tremadoc	Migneintian							477.7
					Lianghekou †			Migneintian							477.9 *
								Cressagian							480.8 *
											Warendian				482.8 *
												Mansian †			483.55 *
												Mansian †			485 *
Cambrian	Furongian	Stage 10				Batyrbaian						Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Jiangshanian				Batyrbaian						Batyrbaian			489.5
						Aksaian						Aksaian			490.7 *
						Sakian						Sakian			492.2 *
		Paibian													494
		Paibian												Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian				Ayusokkanian						Ayusokkanian			497
		Guzhangian										Mayan/Menevian			499.5
		Drumian				Zhanaarykian									500.5
		Drumian				Tuesaian									503
		Wuliuan				Tuesaian						Amgan/Solvan			504.5
		Wuliuan													505.3
	Series 2	Stage 4													509
						Toyonian						Toyonian	Lenian †		510 *
						Botomian						Botomian			512.5 *
		Stage 3				Botomian						Botomian			514
		Stage 3				Atdabanian						Atdabanian			515.6 *
	Terreneuvian	Stage 2				Tommotian						Tommotian			521
		Stage 2										Nemakit-Daldynian			525.5
		Fortunian										Nemakit-Daldynian	Manykaian †		529
															538.8