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			Cambrian of Kazakhstan	Ordovician of the Baltic				Ordovician of Australia	Cambrian of Siberia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †		Harju	Porkuni			Bolindian				443.8
		Katian	Chientangkiangian					Pirgu			Bolindian				445.2
			Chientangkiangian								Eastonian				449 *
			Neichianshanian/Hanjiang												449.5
								Vormsi							449.6 *
								Nabala	Johvi †						450 *
							Viru	Rakvere							450.6 *
								Oandu			Gisbornian				452 *
		Sandbian						Keila	Idavere †						453
								Haljala							453.9
								Kukruse							456.4 *
								Uhaku	Aluoja †						457.5 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo				Uhaku			Darriwilian				458.4
								Lasnamagi							458.9 *
								Aseri							460.4 *
							Oeland	Kunda							462.9 *
									Valaste †/Hunderum						464.3 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo										466.3 *
								Volkhov		Langevoja †/Vaana/Saka					467.1 *
		Dapingian	Dapingian								Yapeenian				467.3
											Castlemainian				468.5 *
								Billingen			Castlemainian				469.3 *
	Early Ordovician	Floian	Yiyangian								Chewtonian				470
									Latorp †		Chewtonian				470.1 *
											Bendigonian				471.8 *
											Lancefieldian				473.5 *
								Hunneberg							473.7 *
		Tremadocian	Xinchangian			Ungurian									477.7
					Lianghekou †										477.9 *
								Varangu							481.3 *
								Pakerort							482.2 *
											Warendian				482.8 *
											Warendian	Mansian †			483.55 *
Cambrian	Furongian	Stage 10				Batyrbaian						Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
															486.3 *
															486.5
		Jiangshanian													489.5
						Aksaian						Aksaian			490.7 *
						Sakian						Sakian			492.2 *
		Paibian													494
		Paibian												Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian				Ayusokkanian						Ayusokkanian			497
		Guzhangian										Mayan/Menevian			499.5
		Drumian				Zhanaarykian									500.5
		Drumian				Tuesaian									503
		Wuliuan				Tuesaian						Amgan/Solvan			504.5
		Wuliuan													505.3
	Series 2	Stage 4													509
						Toyonian						Toyonian	Lenian †		510 *
						Botomian						Botomian			512.5 *
		Stage 3				Botomian						Botomian			514
		Stage 3				Atdabanian						Atdabanian			515.6 *
	Terreneuvian	Stage 2				Tommotian						Tommotian			521
		Stage 2										Nemakit-Daldynian			525.5
		Fortunian										Nemakit-Daldynian	Manykaian †		529
															538.8