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
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 the Baltic				Cambrian of Australia	Cambrian of West Avalonia	Ordovician of Britain
Ordovician	Late Ordovician	Hirnantian		Harju	Porkuni					Ashgill	Hirnantian			443.8
		Katian			Pirgu						Rawtheyan			445.2
											Cautleyan			448.9 *
											Pusgillian			449.3 *
					Vormsi					Caradoc	Streffordian	Onnian †		449.6 *
					Nabala	Johvi †								450 *
				Viru	Rakvere									450.6 *
					Rakvere						Cheneyan			451.5 *
					Oandu						Cheneyan			452 *
					Oandu						Burrellian			452.7 *
		Sandbian			Keila	Idavere †								453
					Keila							Actonian †		453.2 *
					Haljala							Actonian †		453.9
												Marshbrookian †	Woolstonian †	454.2 *
												Longvillian †		455.2 *
					Kukruse									456.4 *
											Aurelucian			456.8 *
												Soudleyan †/Harnagian/Costonian		457.4 *
					Uhaku	Aluoja †						Soudleyan †/Harnagian/Costonian		457.5 *
	Middle Ordovician	Darriwilian			Uhaku					Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
					Lasnamagi									458.9 *
					Aseri									460.4 *
					Aseri						Abereiddian/Early Llanvirn			461.3 *
				Oeland	Kunda									462.9 *
					Kunda	Valaste †/Hunderum								464.3 *
					Volkhov		Langevoja †/Vaana/Saka							467.1 *
		Dapingian												467.3
										Arenig	Fennian			468.4 *
					Billingen									469.3 *
	Early Ordovician	Floian												470
						Latorp †								470.1 *
											Whitlandian			471.1 *
					Hunneberg						Whitlandian			473.7 *
											Moridunian			474.3 *
		Tremadocian								Tremadoc	Migneintian			477.7
											Cressagian			480.8 *
					Varangu									481.3 *
					Pakerort									482.2 *
														485 *
Cambrian	Furongian	Stage 10	Late Cambrian					Datsonian						485.4
														486.3 *
														486.5
								Payntonian						486.8 *
		Jiangshanian						Iverian						489.5
		Paibian						Idamean						494
	Miaolingian	Guzhangian	Middle Cambrian					Mindyallan						497
								Mindyallan	Arcadian					498.4
								Boomerangian						499
		Drumian						Undillan						500.5
		Drumian						Floran						503
		Wuliuan						Templetonian						504.5
		Wuliuan						Ordian						507.8 *
	Series 2	Stage 4	Early Cambrian					Ordian	Branchian					509
		Stage 4												510.8 *
		Stage 3												514
		Stage 3							Placentian					517.1
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian												529
														538.8