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

Show more time

Show linear time

International Chronostratigraphic Timescale			Cambrian Epochs	Ordovician of the Baltic				Cambrian of China		Cambrian of Britain
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		Pakerort			Niuchehean	Taoyuanian †	Merioneth	Dolgellian/Trempealeauan	485.4
												486.3 *
												486.5
											Festiniogian	489.2 *
		Jiangshanian						Jiangshanian			Festiniogian	489.5
		Jiangshanian						Jiangshanian			Maentwrogian	493.1 *
		Paibian						Paibian				494
		Paibian						Paibian	Waergangian †/Youshuanian			494.9 *
	Miaolingian	Guzhangian	Middle Cambrian					Guzhangian	Wangcunian †	St Davids		497
		Drumian						Drumian	Wangcunian †			500.5
		Wuliuan						Wuliuan/Taijangian				504.5
	Series 2	Stage 4	Early Cambrian					Duyunian		Caerfai		509
	Series 2	Stage 3						Nangaoian				514
	Terreneuvian	Stage 2						Meishucunian				521
		Fortunian						Meishucunian				529
		Fortunian						Jinnigian				530.7
												538.8