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
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 Siberia			Cambrian of Australia	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 *
				Mansian †								Demingian †	483.55 *
Cambrian	Furongian	Stage 10	Late Cambrian	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Datsonian						485.4
							Payntonian						486.8 *
							Payntonian						487.5
		Jiangshanian					Iverian						489.5
				Aksaian									490.7 *
				Sakian									492.2 *
		Paibian					Idamean						494
		Paibian				Ensyan †/Maduan/Nganasanian	Idamean						494.7 *
	Miaolingian	Guzhangian	Middle Cambrian	Ayusokkanian			Mindyallan						497
				Ayusokkanian			Boomerangian						499
				Mayan/Menevian			Boomerangian						499.5
		Drumian					Undillan						500.5
		Drumian					Floran						503
		Wuliuan		Amgan/Solvan			Templetonian						504.5
		Wuliuan					Ordian						507.8 *
	Series 2	Stage 4	Early Cambrian										509
				Toyonian	Lenian †								510 *
				Toyonian									510.8 *
				Botomian									512.5 *
		Stage 3		Botomian									514
		Stage 3		Atdabanian									515.6 *
	Terreneuvian	Stage 2		Tommotian									521
		Stage 2		Nemakit-Daldynian									525.5
		Fortunian		Nemakit-Daldynian	Manykaian †								529
													538.8