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
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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				Ordovician of North America
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Kosovian				Cincinnatian	Gamachian				443.8
		Katian	Chientangkiangian			Kralodvorian	Bohdalec †				Gamachian				445.2
			Chientangkiangian								Richmondian				446 *
			Neichianshanian/Hanjiang												449.5
						Berounian									449.7 *
											Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian			449.8 *
											Edenian				450.4 *
										Mohawkian	Chatfieldian				451.1 *
		Sandbian									Chatfieldian				453
											Turinian				453.7 *
								Zahorany †/Vinice	Letna †		Turinian				456.2 *
								Zahorany †/Vinice		Whiterockian		Canadian †	Chazyan †/Marmor		457 *
							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
						Arenigian									468
											Rangerian				469.1 *
	Early Ordovician	Floian	Yiyangian							Ibexian	Blackhillsian		Jeffersonian †	Cassinian †	470
		Floian	Yiyangian								Tulean				473.9 *
		Tremadocian	Xinchangian			Tremadocian									477.7
					Lianghekou †										477.9 *
											Stairsian				480.3 *
											Skullrockian			Demingian †	482 *
Cambrian	Furongian	Stage 10									Skullrockian				485.4
															487.5