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 the Baltic				Ordovician of Ibero-Bohemia				Ordovician of North America
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Harju	Porkuni			Kosovian				Cincinnatian	Gamachian				443.8
		Katian	Chientangkiangian				Pirgu			Kralodvorian	Bohdalec †				Gamachian				445.2
			Chientangkiangian												Richmondian				446 *
			Neichianshanian/Hanjiang																449.5
							Vormsi												449.6 *
										Berounian									449.7 *
															Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian			449.8 *
							Nabala	Johvi †							Maysvillian				450 *
							Nabala								Edenian				450.4 *
						Viru	Rakvere								Edenian				450.6 *
							Rakvere							Mohawkian	Chatfieldian				451.1 *
							Oandu												452 *
		Sandbian					Keila	Idavere †											453
							Keila								Turinian				453.7 *
							Haljala												453.9
							Haljala					Zahorany †/Vinice	Letna †						456.2 *
							Kukruse												456.4 *
							Kukruse							Whiterockian		Canadian †	Chazyan †/Marmor		457 *
							Uhaku	Aluoja †											457.5 *
											Liben †								458 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo															458.4
										Dobrotivian									458.5 *
							Lasnamagi			Dobrotivian									458.9 *
							Lasnamagi			Oretanian									459.7 *
							Aseri												460.4 *
							Aseri				Sarka †								461.7 *
						Oeland	Kunda												462.9 *
								Valaste †/Hunderum											464.3 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo														466.3 *
							Volkhov		Langevoja †/Vaana/Saka										467.1 *
		Dapingian	Dapingian								Klabava †								467.3
										Arenigian									468
															Rangerian				469.1 *
							Billingen								Rangerian				469.3 *
	Early Ordovician	Floian	Yiyangian											Ibexian	Blackhillsian		Jeffersonian †	Cassinian †	470
								Latorp †											470.1 *
							Hunneberg												473.7 *
															Tulean				473.9 *
		Tremadocian	Xinchangian							Tremadocian									477.7
					Lianghekou †														477.9 *
															Stairsian				480.3 *
							Varangu								Stairsian				481.3 *
							Varangu								Skullrockian			Demingian †	482 *
							Pakerort											Demingian †	482.2 *
Cambrian	Furongian	Stage 10					Pakerort												485.4
																			486.3 *
																			486.5
																			487.5