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

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International Chronostratigraphic Timescale			Ordovician of China			Ordovician of Ibero-Bohemia				Cambrian of Kazakhstan	Ordovician of Australia	Cambrian of Siberia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Kosovian					Bolindian				443.8
		Katian	Chientangkiangian			Kralodvorian	Bohdalec †				Bolindian				445.2
			Chientangkiangian								Eastonian				449 *
			Neichianshanian/Hanjiang												449.5
						Berounian									449.7 *
											Gisbornian				452 *
		Sandbian													453
								Zahorany †/Vinice	Letna †						456.2 *
							Liben †								458 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo							Darriwilian				458.4
						Dobrotivian									458.5 *
						Oretanian									459.7 *
							Sarka †								461.7 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo		Sarka †								466.3 *
		Dapingian	Dapingian				Klabava †				Yapeenian				467.3
						Arenigian					Yapeenian				468
											Castlemainian				468.5 *
	Early Ordovician	Floian	Yiyangian								Chewtonian				470
											Bendigonian				471.8 *
											Lancefieldian				473.5 *
		Tremadocian	Xinchangian			Tremadocian				Ungurian					477.7
					Lianghekou †										477.9 *
											Warendian				482.8 *
											Warendian	Mansian †			483.55 *
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