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