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

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				Ordovician of Ibero-Bohemia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Ashgill	Hirnantian			Kosovian				443.8
		Katian	Chientangkiangian				Rawtheyan			Kralodvorian	Bohdalec †			445.2
							Cautleyan							448.9 *
							Pusgillian							449.3 *
			Neichianshanian/Hanjiang				Pusgillian							449.5
						Caradoc	Streffordian	Onnian †						449.6 *
							Streffordian			Berounian				449.7 *
							Cheneyan							451.5 *
							Burrellian							452.7 *
		Sandbian												453
								Actonian †						453.2 *
								Marshbrookian †	Woolstonian †					454.2 *
								Longvillian †						455.2 *
												Zahorany †/Vinice	Letna †	456.2 *
							Aurelucian							456.8 *
								Soudleyan †/Harnagian/Costonian						457.4 *
								Soudleyan †/Harnagian/Costonian			Liben †			458 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo		Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn							458.4
										Dobrotivian				458.5 *
										Oretanian				459.7 *
							Abereiddian/Early Llanvirn							461.3 *
											Sarka †			461.7 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo						Sarka †			466.3 *
		Dapingian	Dapingian								Klabava †			467.3
										Arenigian				468
						Arenig	Fennian							468.4 *
	Early Ordovician	Floian	Yiyangian				Fennian							470
							Whitlandian							471.1 *
							Moridunian							474.3 *
		Tremadocian	Xinchangian			Tremadoc	Migneintian			Tremadocian				477.7
					Lianghekou †		Migneintian							477.9 *
							Cressagian							480.8 *
														485 *
														485.4