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			Ordovician of Britain				Ordovician of Australia	Ordovician of Ibero-Bohemia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Ashgill	Hirnantian			Bolindian	Kosovian				443.8
		Katian	Chientangkiangian				Rawtheyan				Kralodvorian	Bohdalec †			445.2
							Cautleyan								448.9 *
							Cautleyan			Eastonian					449 *
							Pusgillian								449.3 *
			Neichianshanian/Hanjiang				Pusgillian								449.5
						Caradoc	Streffordian	Onnian †							449.6 *
							Streffordian				Berounian				449.7 *
							Cheneyan								451.5 *
							Cheneyan			Gisbornian					452 *
							Burrellian								452.7 *
		Sandbian													453
								Actonian †							453.2 *
								Marshbrookian †	Woolstonian †						454.2 *
								Longvillian †							455.2 *
													Zahorany †/Vinice	Letna †	456.2 *
							Aurelucian								456.8 *
								Soudleyan †/Harnagian/Costonian							457.4 *
								Soudleyan †/Harnagian/Costonian				Liben †			458 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo		Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			Darriwilian					458.4
											Dobrotivian				458.5 *
											Oretanian				459.7 *
							Abereiddian/Early Llanvirn								461.3 *
												Sarka †			461.7 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo							Sarka †			466.3 *
		Dapingian	Dapingian							Yapeenian		Klabava †			467.3
											Arenigian				468
						Arenig	Fennian								468.4 *
										Castlemainian					468.5 *
	Early Ordovician	Floian	Yiyangian							Chewtonian					470
							Whitlandian			Chewtonian					471.1 *
										Bendigonian					471.8 *
										Lancefieldian					473.5 *
							Moridunian								474.3 *
		Tremadocian	Xinchangian			Tremadoc	Migneintian				Tremadocian				477.7
					Lianghekou †		Migneintian								477.9 *
							Cressagian								480.8 *
							Cressagian			Warendian					482.8 *
										Warendian					485 *
															485.4