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
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. 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 West Avalonia	Ordovician of Britain				Obsolete Names for ICS Units
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	Ashgill	Hirnantian	443.8
		Katian		Rawtheyan	445.2
				Cautleyan	448.9 *
				Pusgillian	449.3 *
			Caradoc	Streffordian	Onnian †	449.6 *
				Cheneyan		451.5 *
				Burrellian		452.7 *
		Sandbian				453
					Actonian †	453.2 *
					Marshbrookian †	Woolstonian †	454.2 *
					Longvillian †		455.2 *
				Aurelucian	Longvillian †		456.8 *
				Aurelucian	Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn			458.4
		Darriwilian		Abereiddian/Early Llanvirn			461.3 *
		Dapingian		Abereiddian/Early Llanvirn			467.3
		Dapingian	Arenig	Fennian			468.4 *
	Early Ordovician	Floian		Fennian			470
				Whitlandian			471.1 *
				Moridunian			474.3 *
		Tremadocian	Tremadoc	Migneintian			477.7
			Tremadoc	Cressagian			480.8 *
							485 *
Cambrian	Furongian	Stage 10					Late Cambrian	485.4
		Jiangshanian						489.5
		Paibian						494
	Miaolingian	Guzhangian					Middle Cambrian	Series 3 †	497
		Guzhangian							Arcadian		498.4
		Drumian									500.5
		Wuliuan								Stage 5 †	504.5
	Series 2	Stage 4					Early Cambrian	Branchian			509
		Stage 3						Branchian			514
		Stage 3						Placentian			517.1
	Terreneuvian	Stage 2									521
	Terreneuvian	Fortunian									529
												538.8