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
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	Ordovician of North America					Ordovician of the Baltic				Cambrian of North America		Cambrian of Australia
Ordovician	Late Ordovician	Hirnantian		Cincinnatian	Gamachian				Harju	Porkuni						443.8
		Katian			Gamachian					Pirgu						445.2
					Richmondian					Pirgu						446 *
					Richmondian					Vormsi						449.6 *
					Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian				Vormsi						449.8 *
					Maysvillian					Nabala	Johvi †					450 *
					Edenian					Nabala						450.4 *
					Edenian				Viru	Rakvere						450.6 *
				Mohawkian	Chatfieldian					Rakvere						451.1 *
										Oandu						452 *
		Sandbian								Keila	Idavere †					453
					Turinian					Keila						453.7 *
										Haljala						453.9
										Kukruse						456.4 *
				Whiterockian		Canadian †	Chazyan †/Marmor			Kukruse						457 *
										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														467.3
					Rangerian											469.1 *
					Rangerian					Billingen						469.3 *
	Early Ordovician	Floian		Ibexian	Blackhillsian		Jeffersonian †	Cassinian †								470
											Latorp †					470.1 *
										Hunneberg						473.7 *
					Tulean											473.9 *
		Tremadocian			Tulean											477.7
					Stairsian											480.3 *
					Stairsian					Varangu						481.3 *
					Skullrockian			Demingian †		Varangu						482 *
								Demingian †		Pakerort						482.2 *
Cambrian	Furongian	Stage 10	Late Cambrian							Pakerort				Franconian †/Dresbachian/Millardan	Datsonian	485.4
																486.3 *
																486.5
															Payntonian	486.8 *
													Sunwaptan		Payntonian	487.5
		Jiangshanian											Sunwaptan		Iverian	489.5
		Jiangshanian											Steptoean		Iverian	493 *
		Paibian											Steptoean		Idamean	494
	Miaolingian	Guzhangian	Middle Cambrian										Marjumian	Albertian †	Mindyallan	497
		Guzhangian													Boomerangian	499
		Drumian													Undillan	500.5
		Drumian													Floran	503
		Wuliuan											Topazan		Templetonian	504.5
													Delamaran		Templetonian	506.5
															Ordian	507.8 *
	Series 2	Stage 4	Early Cambrian											Waucoban †	Ordian	509
																510.8 *
													Dyeran			511 *
		Stage 3											Dyeran			514
													Montezuman			514.8 *
													Begadean			519.9 *
	Terreneuvian	Stage 2														521
	Terreneuvian	Fortunian														529
																538.8