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			Cambrian of Kazakhstan	Ordovician of Australia	Cambrian of Siberia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †		Bolindian				443.8
		Katian	Chientangkiangian				Bolindian				445.2
			Chientangkiangian				Eastonian				449 *
			Neichianshanian/Hanjiang				Eastonian				449.5
							Gisbornian				452 *
		Sandbian					Gisbornian				453
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo			Darriwilian				458.4
		Darriwilian	Darriwilian	Hunjiang †	Dawan †/Daobaowan/Ningkuo		Darriwilian				466.3 *
		Dapingian	Dapingian				Yapeenian				467.3
		Dapingian	Dapingian				Castlemainian				468.5 *
	Early Ordovician	Floian	Yiyangian				Chewtonian				470
							Bendigonian				471.8 *
							Lancefieldian				473.5 *
		Tremadocian	Xinchangian			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