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
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
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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 Britain		Cambrian of China		Ordovician of North America
Ordovician	Late Ordovician	Hirnantian						Cincinnatian	Gamachian				443.8
		Katian							Gamachian				445.2
									Richmondian				446 *
									Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian			449.8 *
									Edenian				450.4 *
								Mohawkian	Chatfieldian				451.1 *
		Sandbian							Chatfieldian				453
									Turinian				453.7 *
								Whiterockian		Canadian †	Chazyan †/Marmor		457 *
	Middle Ordovician	Darriwilian											458.4
		Dapingian											467.3
		Dapingian							Rangerian				469.1 *
	Early Ordovician	Floian						Ibexian	Blackhillsian		Jeffersonian †	Cassinian †	470
		Floian							Tulean				473.9 *
		Tremadocian							Tulean				477.7
									Stairsian				480.3 *
									Skullrockian			Demingian †	482 *
Cambrian	Furongian	Stage 10	Late Cambrian	Merioneth	Dolgellian/Trempealeauan	Niuchehean	Taoyuanian †		Skullrockian				485.4
					Dolgellian/Trempealeauan								487.5
					Festiniogian								489.2 *
		Jiangshanian			Festiniogian	Jiangshanian							489.5
		Jiangshanian			Maentwrogian	Jiangshanian							493.1 *
		Paibian				Paibian							494
		Paibian				Paibian	Waergangian †/Youshuanian						494.9 *
	Miaolingian	Guzhangian	Middle Cambrian	St Davids		Guzhangian	Wangcunian †						497
		Drumian				Drumian	Wangcunian †						500.5
		Wuliuan				Wuliuan/Taijangian							504.5
	Series 2	Stage 4	Early Cambrian	Caerfai		Duyunian							509
	Series 2	Stage 3				Nangaoian							514
	Terreneuvian	Stage 2				Meishucunian							521
		Fortunian				Meishucunian							529
		Fortunian				Jinnigian							530.7
													538.8