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

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of China			Cambrian of Kazakhstan	Ordovician of the Baltic				Ordovician of Ibero-Bohemia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †		Harju	Porkuni			Kosovian				443.8
		Katian	Chientangkiangian		Wufeng †			Pirgu			Kralodvorian	Bohdalec †			445.2
			Neichianshanian/Hanjiang					Pirgu							449.5
								Vormsi							449.6 *
								Vormsi			Berounian				449.7 *
								Nabala	Johvi †						450 *
							Viru	Rakvere							450.6 *
								Oandu							452 *
		Sandbian						Keila	Idavere †						453
								Haljala							453.9
								Haljala					Zahorany †/Vinice	Letna †	456.2 *
								Kukruse							456.4 *
								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
								Billingen							469.3 *
	Early Ordovician	Floian	Yiyangian												470
									Latorp †						470.1 *
								Hunneberg							473.7 *
		Tremadocian	Xinchangian			Ungurian					Tremadocian				477.7
					Lianghekou †										477.9 *
								Varangu							481.3 *
								Pakerort							482.2 *
Cambrian	Furongian	Stage 10				Batyrbaian		Pakerort							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