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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

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	Cambrian Epochs	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	Late Cambrian		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	Middle Cambrian					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		Early Cambrian						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