PBDB Timescale

Cambrian of Kazakhstan

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
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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view

There are 15 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 30 collections

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International Chronostratigraphic Timescale			Cambrian of Kazakhstan	Ordovician of the Baltic				Cambrian of North America		Ordovician of Ibero-Bohemia
Ordovician	Late Ordovician	Hirnantian		Harju	Porkuni					Kosovian				443.8
		Katian			Pirgu					Kralodvorian	Bohdalec †			445.2
					Vormsi					Kralodvorian				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												458.4
										Dobrotivian				458.5 *
					Lasnamagi					Dobrotivian				458.9 *
					Lasnamagi					Oretanian				459.7 *
					Aseri									460.4 *
					Aseri						Sarka †			461.7 *
				Oeland	Kunda									462.9 *
					Kunda	Valaste †/Hunderum								464.3 *
					Volkhov		Langevoja †/Vaana/Saka							467.1 *
		Dapingian									Klabava †			467.3
										Arenigian				468
					Billingen									469.3 *
	Early Ordovician	Floian												470
						Latorp †								470.1 *
					Hunneberg									473.7 *
		Tremadocian	Ungurian		Hunneberg					Tremadocian				477.7
					Varangu									481.3 *
					Pakerort									482.2 *
Cambrian	Furongian	Stage 10	Batyrbaian		Pakerort				Franconian †/Dresbachian/Millardan					485.4
														486.3 *
														486.5
								Sunwaptan						487.5
		Jiangshanian												489.5
			Aksaian											490.7 *
			Sakian											492.2 *
								Steptoean						493 *
		Paibian						Steptoean						494
	Miaolingian	Guzhangian	Ayusokkanian					Marjumian	Albertian †					497
		Guzhangian												499.5
		Drumian	Zhanaarykian											500.5
		Drumian	Tuesaian											503
		Wuliuan	Tuesaian					Topazan						504.5
								Topazan						505.3
								Delamaran						506.5
	Series 2	Stage 4							Waucoban †					509
			Toyonian											510 *
			Toyonian					Dyeran						511 *
			Botomian											512.5 *
		Stage 3												514
								Montezuman						514.8 *
			Atdabanian					Montezuman						515.6 *
			Atdabanian					Begadean						519.9 *
	Terreneuvian	Stage 2	Tommotian											521
		Stage 2												525.5
		Fortunian												529
														538.8