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 Siberia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Kosovian							443.8
		Katian	Chientangkiangian		Wufeng †	Kralodvorian	Bohdalec †						445.2
			Neichianshanian/Hanjiang			Kralodvorian							449.5
						Berounian							449.7 *
		Sandbian											453
								Zahorany †/Vinice	Letna †				456.2 *
							Liben †						458 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo									458.4
						Dobrotivian							458.5 *
						Oretanian							459.7 *
							Sarka †						461.7 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo		Sarka †						466.3 *
		Dapingian	Dapingian				Klabava †						467.3
		Dapingian	Dapingian			Arenigian							468
	Early Ordovician	Floian	Yiyangian			Arenigian							470
		Tremadocian	Xinchangian			Tremadocian							477.7
					Lianghekou †								477.9 *
					Lianghekou †					Mansian †			483.55 *
Cambrian	Furongian	Stage 10								Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Jiangshanian								Batyrbaian			489.5
										Aksaian			490.7 *
										Sakian			492.2 *
		Paibian											494
		Paibian										Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian								Ayusokkanian			497
		Guzhangian								Mayan/Menevian			499.5
		Drumian								Mayan/Menevian			500.5
		Wuliuan								Amgan/Solvan			504.5
	Series 2	Stage 4								Amgan/Solvan			509
										Toyonian	Lenian †		510 *
										Botomian			512.5 *
		Stage 3								Botomian			514
		Stage 3								Atdabanian			515.6 *
	Terreneuvian	Stage 2								Tommotian			521
		Stage 2								Nemakit-Daldynian			525.5
		Fortunian								Nemakit-Daldynian	Manykaian †		529
													538.8