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
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		Ordovician of the Baltic				Cambrian of North America		Cambrian of Australia
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						477.7
							Varangu						481.3 *
							Pakerort						482.2 *
Cambrian	Furongian	Stage 10	Late Cambrian	Niuchehean	Taoyuanian †		Pakerort				Franconian †/Dresbachian/Millardan	Datsonian	485.4
													486.3 *
													486.5
												Payntonian	486.8 *
										Sunwaptan		Payntonian	487.5
		Jiangshanian		Jiangshanian						Sunwaptan		Iverian	489.5
		Jiangshanian		Jiangshanian						Steptoean		Iverian	493 *
		Paibian		Paibian								Idamean	494
		Paibian		Paibian	Waergangian †/Youshuanian							Idamean	494.9 *
	Miaolingian	Guzhangian	Middle Cambrian	Guzhangian	Wangcunian †					Marjumian	Albertian †	Mindyallan	497
		Guzhangian		Guzhangian								Boomerangian	499
		Drumian		Drumian								Undillan	500.5
		Drumian		Drumian								Floran	503
		Wuliuan		Wuliuan/Taijangian						Topazan		Templetonian	504.5
										Delamaran		Templetonian	506.5
												Ordian	507.8 *
	Series 2	Stage 4	Early Cambrian	Duyunian							Waucoban †	Ordian	509
													510.8 *
										Dyeran			511 *
		Stage 3		Nangaoian						Dyeran			514
										Montezuman			514.8 *
										Begadean			519.9 *
	Terreneuvian	Stage 2		Meishucunian									521
		Fortunian		Meishucunian									529
		Fortunian		Jinnigian									530.7
													538.8