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
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

Show more time

Show linear time

International Chronostratigraphic Timescale			Cambrian Epochs	Cambrian of North America		Ordovician of North America					Cambrian of Britain		Cambrian of West Avalonia	Cambrian of Kazakhstan
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							Ungurian	477.7
							Stairsian								480.3 *
							Skullrockian			Demingian †					482 *
Cambrian	Furongian	Stage 10	Late Cambrian		Franconian †/Dresbachian/Millardan		Skullrockian				Merioneth	Dolgellian/Trempealeauan		Batyrbaian	485.4
				Sunwaptan								Dolgellian/Trempealeauan			487.5
												Festiniogian			489.2 *
		Jiangshanian													489.5
														Aksaian	490.7 *
														Sakian	492.2 *
				Steptoean											493 *
												Maentwrogian			493.1 *
		Paibian										Maentwrogian			494
	Miaolingian	Guzhangian	Middle Cambrian	Marjumian	Albertian †						St Davids			Ayusokkanian	497
													Arcadian	Ayusokkanian	498.4
															499.5
		Drumian												Zhanaarykian	500.5
		Drumian												Tuesaian	503
		Wuliuan		Topazan										Tuesaian	504.5
				Topazan											505.3
				Delamaran											506.5
	Series 2	Stage 4	Early Cambrian		Waucoban †						Caerfai		Branchian		509
														Toyonian	510 *
				Dyeran										Toyonian	511 *
														Botomian	512.5 *
		Stage 3													514
				Montezuman											514.8 *
														Atdabanian	515.6 *
													Placentian		517.1
				Begadean											519.9 *
	Terreneuvian	Stage 2												Tommotian	521
		Stage 2													525.5
		Fortunian													529
															538.8