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
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
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

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 North America					Cambrian of North America		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		Skullrockian					Franconian †/Dresbachian/Millardan	Batyrbaian	485.4
		Stage 10							Sunwaptan			487.5
		Jiangshanian										489.5
											Aksaian	490.7 *
											Sakian	492.2 *
									Steptoean			493 *
		Paibian							Steptoean			494
	Miaolingian	Guzhangian	Middle Cambrian						Marjumian	Albertian †	Ayusokkanian	497
		Guzhangian										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 †		509
											Toyonian	510 *
									Dyeran		Toyonian	511 *
											Botomian	512.5 *
		Stage 3										514
									Montezuman			514.8 *
									Montezuman		Atdabanian	515.6 *
									Begadean		Atdabanian	519.9 *
	Terreneuvian	Stage 2									Tommotian	521
		Stage 2										525.5
		Fortunian										529
												538.8