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				Cambrian of Kazakhstan	Ordovician of the Baltic				Ordovician of Ibero-Bohemia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Ashgill	Hirnantian				Harju	Porkuni			Kosovian				443.8
		Katian	Chientangkiangian				Rawtheyan					Pirgu			Kralodvorian	Bohdalec †			445.2
							Cautleyan												448.9 *
							Pusgillian												449.3 *
			Neichianshanian/Hanjiang				Pusgillian												449.5
						Caradoc	Streffordian	Onnian †				Vormsi							449.6 *
												Vormsi			Berounian				449.7 *
												Nabala	Johvi †						450 *
											Viru	Rakvere							450.6 *
							Cheneyan					Rakvere							451.5 *
							Cheneyan					Oandu							452 *
							Burrellian					Oandu							452.7 *
		Sandbian										Keila	Idavere †						453
								Actonian †				Keila							453.2 *
								Actonian †				Haljala							453.9
								Marshbrookian †	Woolstonian †										454.2 *
								Longvillian †											455.2 *
																	Zahorany †/Vinice	Letna †	456.2 *
												Kukruse							456.4 *
							Aurelucian												456.8 *
								Soudleyan †/Harnagian/Costonian											457.4 *
												Uhaku	Aluoja †						457.5 *
																Liben †			458 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo		Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn												458.4
															Dobrotivian				458.5 *
												Lasnamagi			Dobrotivian				458.9 *
												Lasnamagi			Oretanian				459.7 *
												Aseri							460.4 *
							Abereiddian/Early Llanvirn												461.3 *
																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
						Arenig	Fennian												468.4 *
												Billingen							469.3 *
	Early Ordovician	Floian	Yiyangian																470
													Latorp †						470.1 *
							Whitlandian												471.1 *
							Whitlandian					Hunneberg							473.7 *
							Moridunian												474.3 *
		Tremadocian	Xinchangian			Tremadoc	Migneintian			Ungurian					Tremadocian				477.7
					Lianghekou †		Migneintian												477.9 *
							Cressagian												480.8 *
												Varangu							481.3 *
												Pakerort							482.2 *
																			485 *
Cambrian	Furongian	Stage 10								Batyrbaian									485.4
																			486.3 *
																			486.5
		Jiangshanian																	489.5
										Aksaian									490.7 *
										Sakian									492.2 *
		Paibian								Sakian									494
	Miaolingian	Guzhangian								Ayusokkanian									497
		Guzhangian																	499.5
		Drumian								Zhanaarykian									500.5
		Drumian								Tuesaian									503
		Wuliuan								Tuesaian									504.5
		Wuliuan																	505.3
	Series 2	Stage 4																	509
										Toyonian									510 *
										Botomian									512.5 *
		Stage 3								Botomian									514
		Stage 3								Atdabanian									515.6 *
	Terreneuvian	Stage 2								Tommotian									521
																			525.5