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			Ordovician of the Baltic				Ordovician of Britain				Cambrian of Siberia
Ordovician	Late Ordovician	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Harju	Porkuni			Ashgill	Hirnantian						443.8
		Katian	Chientangkiangian				Pirgu				Rawtheyan						445.2
											Cautleyan						448.9 *
											Pusgillian						449.3 *
			Neichianshanian/Hanjiang								Pusgillian						449.5
							Vormsi			Caradoc	Streffordian	Onnian †					449.6 *
							Nabala	Johvi †									450 *
						Viru	Rakvere										450.6 *
							Rakvere				Cheneyan						451.5 *
							Oandu				Cheneyan						452 *
							Oandu				Burrellian						452.7 *
		Sandbian					Keila	Idavere †									453
							Keila					Actonian †					453.2 *
							Haljala					Actonian †					453.9
												Marshbrookian †	Woolstonian †				454.2 *
												Longvillian †					455.2 *
							Kukruse										456.4 *
											Aurelucian						456.8 *
												Soudleyan †/Harnagian/Costonian					457.4 *
							Uhaku	Aluoja †				Soudleyan †/Harnagian/Costonian					457.5 *
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo			Uhaku			Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn						458.4
							Lasnamagi										458.9 *
							Aseri										460.4 *
							Aseri				Abereiddian/Early Llanvirn						461.3 *
						Oeland	Kunda										462.9 *
								Valaste †/Hunderum									464.3 *
				Hunjiang †	Dawan †/Daobaowan/Ningkuo												466.3 *
							Volkhov		Langevoja †/Vaana/Saka								467.1 *
		Dapingian	Dapingian														467.3
										Arenig	Fennian						468.4 *
							Billingen										469.3 *
	Early Ordovician	Floian	Yiyangian														470
								Latorp †									470.1 *
											Whitlandian						471.1 *
							Hunneberg				Whitlandian						473.7 *
											Moridunian						474.3 *
		Tremadocian	Xinchangian							Tremadoc	Migneintian						477.7
					Lianghekou †						Migneintian						477.9 *
											Cressagian						480.8 *
							Varangu										481.3 *
							Pakerort										482.2 *
														Mansian †			483.55 *
														Mansian †			485 *
Cambrian	Furongian	Stage 10												Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
																	486.3 *
																	486.5
		Jiangshanian															489.5
														Aksaian			490.7 *
														Sakian			492.2 *
		Paibian															494
		Paibian														Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian												Ayusokkanian			497
		Guzhangian												Mayan/Menevian			499.5
		Drumian												Mayan/Menevian			500.5
		Wuliuan												Amgan/Solvan			504.5
	Series 2	Stage 4												Amgan/Solvan			509
														Toyonian	Lenian †		510 *
														Botomian			512.5 *
		Stage 3												Botomian			514
		Stage 3												Atdabanian			515.6 *
	Terreneuvian	Stage 2												Tommotian			521
		Stage 2												Nemakit-Daldynian			525.5
		Fortunian												Nemakit-Daldynian	Manykaian †		529
																	538.8