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
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
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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	Obsolete Names for ICS Units			Ordovician of the Baltic				Cambrian of West Avalonia	Cambrian of Kazakhstan	Cambrian of Australia	Cambrian of Britain
Neogene	Pliocene	Piacenzian		Tertiary †												2.58
	Pliocene	Zanclean														3.6
	Miocene	Messinian														5.333
		Tortonian														7.246
		Serravallian														11.63
		Langhian														13.82
		Burdigalian														15.98
		Aquitanian														20.44
Paleogene	Oligocene	Chattian														23.03
	Oligocene	Rupelian														27.82
	Eocene	Priabonian														33.9
		Bartonian														37.71
		Lutetian														41.2
		Ypresian														47.8
	Paleocene	Thanetian														56
		Selandian														59.2
		Danian														61.6
Cretaceous	Late Cretaceous	Maastrichtian														66
		Campanian														72.1
		Santonian														83.6
		Coniacian														86.3
		Turonian														89.8
		Cenomanian														93.9
	Early Cretaceous	Albian														100.5
		Aptian														113
		Barremian														121.4
		Hauterivian														125.77
		Valanginian														132.6
		Berriasian														139.8
Jurassic	Late Jurassic	Tithonian														145
		Kimmeridgian														149.2
		Oxfordian														154.8
	Middle Jurassic	Callovian														161.5
		Bathonian														165.3
		Bajocian														168.2
		Aalenian														170.9
	Early Jurassic	Toarcian														174.7
		Pliensbachian														184.2
		Sinemurian														192.9
		Hettangian														199.5
Triassic	Late Triassic	Rhaetian														201.4
		Norian														208.5
		Carnian														227
	Middle Triassic	Ladinian														237
	Middle Triassic	Anisian														242
	Early Triassic	Olenekian														247.2
	Early Triassic	Induan														251.2
Permian	Lopingian	Changhsingian														251.902
	Lopingian	Wuchiapingian			Longtanian †											254.14
	Guadalupian	Capitanian														259.51
		Wordian														264.28
		Roadian														266.9
	Cisuralian	Kungurian														273.01
		Artinskian														283.5
		Sakmarian														290.1
		Asselian														293.52
Carboniferous	Pennsylvanian	Gzhelian														298.9
		Kasimovian														303.7
		Moscovian														307
		Bashkirian														315.2
	Mississippian	Serpukhovian														323.2
		Visean														330.9
		Tournaisian														346.7
Devonian	Late Devonian	Famennian														358.9
	Late Devonian	Frasnian	372.2
	Middle Devonian	Givetian	382.7
	Middle Devonian	Eifelian	387.7
	Early Devonian	Emsian	393.3
		Pragian	407.6
		Lochkovian	410.8
Silurian	Pridoli		419.2
	Ludlow	Ludfordian	423
	Ludlow	Gorstian	425.6
	Wenlock	Homerian	427.4
	Wenlock	Sheinwoodian	430.5
	Llandovery	Telychian	433.4
		Aeronian	438.5
		Rhuddanian	440.8
Ordovician	Late Ordovician	Hirnantian	Harju			Porkuni	443.8
		Katian				Pirgu	445.2
						Vormsi	449.6 *
				Nabala		Johvi †	450 *
			Viru	Rakvere			450.6 *
				Oandu			452 *
		Sandbian		Keila		Idavere †	453
				Haljala			453.9
				Kukruse			456.4 *
				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		Volkhov				467.3
		Dapingian		Billingen				469.3 *
	Early Ordovician	Floian						470
						Latorp †		470.1 *
				Hunneberg				473.7 *
		Tremadocian		Hunneberg				Ungurian	477.7
				Varangu					481.3 *
				Pakerort					482.2 *
Cambrian	Furongian	Stage 10		Pakerort		Late Cambrian			Batyrbaian	Datsonian	Merioneth	Dolgellian/Trempealeauan	485.4
													486.3 *
													486.5
										Payntonian			486.8 *
										Payntonian		Festiniogian	489.2 *
		Jiangshanian								Iverian			489.5
									Aksaian				490.7 *
									Sakian				492.2 *
												Maentwrogian	493.1 *
		Paibian								Idamean		Maentwrogian	494
	Miaolingian	Guzhangian				Middle Cambrian			Series 3 †	Ayusokkanian	Mindyallan	St Davids		497
					Arcadian						Mindyallan			498.4
											Boomerangian			499
											Boomerangian			499.5
		Drumian								Zhanaarykian	Undillan			500.5
		Drumian								Tuesaian	Floran			503
		Wuliuan								Tuesaian	Stage 5 †			Templetonian	504.5
														Templetonian	505.3
														Ordian	507.8 *
	Series 2	Stage 4			Early Cambrian						Branchian	Caerfai			509
										Toyonian					510 *
										Toyonian					510.8 *
										Botomian					512.5 *
		Stage 3								Botomian					514
										Atdabanian					515.6 *
										Atdabanian	Placentian				517.1
	Terreneuvian	Stage 2								Tommotian					521
		Stage 2													525.5
		Fortunian													529
																538.8