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
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. 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 Kazakhstan	Cambrian of China		Obsolete Names for ICS Units			Ordovician of Britain				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	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	Ungurian	Tremadoc			Migneintian		477.7
				Tremadoc			Cressagian		480.8 *
									485 *
Cambrian	Furongian	Stage 10	Late Cambrian						Batyrbaian	Niuchehean	Taoyuanian †	Datsonian	Merioneth	Dolgellian/Trempealeauan	485.4
												Payntonian		Dolgellian/Trempealeauan	486.8 *
												Payntonian		Festiniogian	489.2 *
		Jiangshanian								Jiangshanian		Iverian			489.5
									Aksaian						490.7 *
									Sakian						492.2 *
														Maentwrogian	493.1 *
		Paibian								Paibian		Idamean			494
		Paibian								Paibian	Waergangian †/Youshuanian	Idamean			494.9 *
	Miaolingian	Guzhangian	Middle Cambrian						Ayusokkanian	Guzhangian	Wangcunian †	Series 3 †	Mindyallan	St Davids		497
									Ayusokkanian				Boomerangian			499
													Boomerangian			499.5
		Drumian						Zhanaarykian	Drumian	Undillan			500.5
		Drumian						Tuesaian	Drumian	Floran			503
		Wuliuan						Tuesaian	Wuliuan/Taijangian		Stage 5 †		Templetonian			504.5
													Templetonian			505.3
													Ordian			507.8 *
	Series 2	Stage 4	Early Cambrian						Duyunian					Caerfai		509
								Toyonian								510 *
								Toyonian								510.8 *
								Botomian								512.5 *
		Stage 3						Botomian	Nangaoian							514
		Stage 3						Atdabanian	Nangaoian							515.6 *
	Terreneuvian	Stage 2						Tommotian	Meishucunian							521
		Stage 2														525.5
		Fortunian														529
		Fortunian							Jinnigian							530.7
																	538.8