PBDB Timescale

Cambrian Epochs

The interval definitions in this timescale are derived from the following sources:

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

There are 12 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 594 collections

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International Chronostratigraphic Timescale			Cambrian Epochs	Cambrian of China		Cambrian of West Avalonia	Cambrian of Australia	Cambrian of Siberia			Ordovician of the Baltic				Cambrian of Kazakhstan
Ordovician	Late Ordovician	Hirnantian									Harju	Porkuni				443.8
		Katian										Pirgu				445.2
												Vormsi				449.6 *
												Nabala	Johvi †			450 *
											Viru	Rakvere				450.6 *
												Oandu				452 *
		Sandbian										Keila	Idavere †			453
												Haljala				453.9
												Kukruse				456.4 *
												Uhaku	Aluoja †			457.5 *
	Middle Ordovician	Darriwilian										Uhaku				458.4
												Lasnamagi				458.9 *
												Aseri				460.4 *
											Oeland	Kunda				462.9 *
												Kunda	Valaste †/Hunderum			464.3 *
												Volkhov		Langevoja †/Vaana/Saka		467.1 *
		Dapingian										Volkhov				467.3
		Dapingian										Billingen				469.3 *
	Early Ordovician	Floian														470
													Latorp †			470.1 *
												Hunneberg				473.7 *
		Tremadocian										Hunneberg			Ungurian	477.7
												Varangu				481.3 *
												Pakerort				482.2 *
								Mansian †								483.55 *
Cambrian	Furongian	Stage 10	Late Cambrian	Niuchehean	Taoyuanian †		Datsonian	Batyrbaian	Tavgian †	Ketyan †/Yurakian					Batyrbaian	485.4
																486.3 *
																486.5
							Payntonian									486.8 *
		Jiangshanian		Jiangshanian			Iverian									489.5
								Aksaian							Aksaian	490.7 *
								Sakian							Sakian	492.2 *
		Paibian		Paibian			Idamean									494
										Ensyan †/Maduan/Nganasanian						494.7 *
					Waergangian †/Youshuanian					Ensyan †/Maduan/Nganasanian						494.9 *
	Miaolingian	Guzhangian	Middle Cambrian	Guzhangian	Wangcunian †		Mindyallan	Ayusokkanian							Ayusokkanian	497
						Arcadian	Mindyallan									498.4
							Boomerangian									499
							Boomerangian	Mayan/Menevian								499.5
		Drumian		Drumian			Undillan								Zhanaarykian	500.5
		Drumian		Drumian			Floran								Tuesaian	503
		Wuliuan		Wuliuan/Taijangian			Templetonian	Amgan/Solvan							Tuesaian	504.5
							Templetonian									505.3
							Ordian									507.8 *
	Series 2	Stage 4	Early Cambrian	Duyunian		Branchian										509
								Toyonian	Lenian †						Toyonian	510 *
								Toyonian							Toyonian	510.8 *
								Botomian							Botomian	512.5 *
		Stage 3		Nangaoian				Botomian							Botomian	514
								Atdabanian							Atdabanian	515.6 *
						Placentian		Atdabanian							Atdabanian	517.1
	Terreneuvian	Stage 2		Meishucunian				Tommotian							Tommotian	521
		Stage 2						Nemakit-Daldynian								525.5
		Fortunian							Manykaian †							529
		Fortunian		Jinnigian					Manykaian †							530.7
																538.8