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	Cambrian of Australia	Ordovician of the Baltic				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