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 West Avalonia	Cambrian of China		Cambrian of Britain		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		Niuchehean	Taoyuanian †	Merioneth	Dolgellian/Trempealeauan		Pakerort			Datsonian	485.4
														486.3 *
														486.5
													Payntonian	486.8 *
								Festiniogian					Payntonian	489.2 *
		Jiangshanian			Jiangshanian			Festiniogian					Iverian	489.5
		Jiangshanian			Jiangshanian			Maentwrogian					Iverian	493.1 *
		Paibian			Paibian								Idamean	494
		Paibian			Paibian	Waergangian †/Youshuanian							Idamean	494.9 *
	Miaolingian	Guzhangian	Middle Cambrian		Guzhangian	Wangcunian †	St Davids						Mindyallan	497
				Arcadian									Mindyallan	498.4
													Boomerangian	499
		Drumian			Drumian								Undillan	500.5
		Drumian			Drumian								Floran	503
		Wuliuan			Wuliuan/Taijangian								Templetonian	504.5
		Wuliuan			Wuliuan/Taijangian								Ordian	507.8 *
	Series 2	Stage 4	Early Cambrian	Branchian	Duyunian		Caerfai						Ordian	509
		Stage 4			Duyunian									510.8 *
		Stage 3			Nangaoian									514
		Stage 3		Placentian	Nangaoian									517.1
	Terreneuvian	Stage 2			Meishucunian									521
		Fortunian			Meishucunian									529
		Fortunian			Jinnigian									530.7
														538.8