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 Britain				Cambrian of Siberia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Ashgill	Hirnantian						443.8
		Katian	Chientangkiangian				Rawtheyan						445.2
							Cautleyan						448.9 *
							Pusgillian						449.3 *
			Neichianshanian/Hanjiang				Pusgillian						449.5
						Caradoc	Streffordian	Onnian †					449.6 *
							Cheneyan						451.5 *
							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						458.4
				Guniu †/Hulo			Abereiddian/Early Llanvirn						461.3 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo								466.3 *
		Dapingian	Dapingian										467.3
		Dapingian	Dapingian			Arenig	Fennian						468.4 *
	Early Ordovician	Floian	Yiyangian				Fennian						470
							Whitlandian						471.1 *
							Moridunian						474.3 *
		Tremadocian	Xinchangian			Tremadoc	Migneintian						477.7
					Lianghekou †		Migneintian						477.9 *
							Cressagian						480.8 *
							Cressagian			Mansian †			483.55 *
										Mansian †			485 *
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