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 Britain		Cambrian of North America		Cambrian of West Avalonia	Ten Million Year Bins
Quaternary	Holocene	Meghalayan											Cenozoic 6	0
		Northgrippian												0.0042
		Greenlandian												0.0082
	Pleistocene	Late Pleistocene												0.0117
		Chibanian												0.129
		Calabrian												0.774
		Gelasian												1.8
Neogene	Pliocene	Piacenzian												2.58
	Pliocene	Zanclean												3.6
	Miocene	Messinian												5.333
		Tortonian												7.246
		Serravallian											Cenozoic 5	11.63
		Langhian												13.82
		Burdigalian												15.98
		Aquitanian												20.44
Paleogene	Oligocene	Chattian											Cenozoic 4	23.03
	Oligocene	Rupelian											Cenozoic 4	27.82
	Eocene	Priabonian											Cenozoic 3	33.9
		Bartonian											Cenozoic 3	37.71
		Lutetian											Cenozoic 2	41.2
		Ypresian											Cenozoic 2	47.8
	Paleocene	Thanetian											Cenozoic 1	56
		Selandian												59.2
		Danian												61.6
Cretaceous	Late Cretaceous	Maastrichtian											Cretaceous 8	66
		Campanian											Cretaceous 7	72.1
		Santonian											Cretaceous 6	83.6
		Coniacian												86.3
		Turonian												89.8
		Cenomanian											Cretaceous 5	93.9
	Early Cretaceous	Albian											Cretaceous 4	100.5
		Aptian											Cretaceous 3	113
		Barremian											Cretaceous 2	121.4
		Hauterivian											Cretaceous 2	125.77
		Valanginian											Cretaceous 1	132.6
		Berriasian											Cretaceous 1	139.8
Jurassic	Late Jurassic	Tithonian											Jurassic 6	145
		Kimmeridgian											Jurassic 5	149.2
		Oxfordian												154.8
	Middle Jurassic	Callovian												161.5
		Bathonian											Jurassic 4	165.3
		Bajocian											Jurassic 4	168.2
		Aalenian											Jurassic 3	170.9
	Early Jurassic	Toarcian											Jurassic 3	174.7
		Pliensbachian											Jurassic 2	184.2
		Sinemurian											Jurassic 1	192.9
		Hettangian											Jurassic 1	199.5
Triassic	Late Triassic	Rhaetian											Triassic 4	201.4
		Norian											Triassic 4	208.5
		Carnian											Triassic 3	227
	Middle Triassic	Ladinian											Triassic 2	237
	Middle Triassic	Anisian											Triassic 2	242
	Early Triassic	Olenekian											Triassic 1	247.2
	Early Triassic	Induan											Triassic 1	251.2
Permian	Lopingian	Changhsingian											Permian 4	251.902
	Lopingian	Wuchiapingian												254.14
	Guadalupian	Capitanian												259.51
		Wordian												264.28
		Roadian											Permian 3	266.9
	Cisuralian	Kungurian											Permian 2	273.01
		Artinskian												283.5
		Sakmarian												290.1
		Asselian											Permian 1	293.52
Carboniferous	Pennsylvanian	Gzhelian											Carboniferous 5	298.9
		Kasimovian	303.7										Carboniferous 5
		Moscovian	Carboniferous 4	307
		Bashkirian	Carboniferous 4	315.2
	Mississippian	Serpukhovian	Carboniferous 3	323.2
		Visean	Carboniferous 2	330.9
		Tournaisian	Carboniferous 1	346.7
Devonian	Late Devonian	Famennian	Devonian 5	358.9
	Late Devonian	Frasnian	Devonian 4	372.2
	Middle Devonian	Givetian	Devonian 3	382.7
	Middle Devonian	Eifelian	Devonian 3	387.7
	Early Devonian	Emsian	Devonian 2	393.3
		Pragian	Devonian 1	407.6
		Lochkovian	Devonian 1	410.8
Silurian	Pridoli		Silurian 2	419.2
	Ludlow	Ludfordian		423
	Ludlow	Gorstian		425.6
	Wenlock	Homerian		427.4
	Wenlock	Sheinwoodian		430.5
	Llandovery	Telychian	Silurian 1	433.4
		Aeronian		438.5
		Rhuddanian		440.8
Ordovician	Late Ordovician	Hirnantian	Harju	Porkuni	Ordovician 5	443.8
		Katian		Pirgu		445.2
				Vormsi		449.6 *
				Nabala		Johvi †	450 *
			Viru	Rakvere			450.6 *
				Oandu			452 *
		Sandbian		Keila	Idavere †	Ordovician 4	453
				Haljala			453.9
				Kukruse			456.4 *
				Uhaku	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian		Uhaku		Ordovician 3	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		Ordovician 2		467.3
		Dapingian		Billingen				469.3 *
	Early Ordovician	Floian						470
					Latorp †			470.1 *
				Hunneberg				473.7 *
		Tremadocian		Hunneberg		Ordovician 1		477.7
				Varangu				481.3 *
				Pakerort				482.2 *
Cambrian	Furongian	Stage 10		Pakerort	Late Cambrian			Merioneth	Dolgellian/Trempealeauan	Franconian †/Dresbachian/Millardan	Cambrian 5	485.4
												486.3 *
												486.5
												Sunwaptan	487.5
									Festiniogian				489.2 *
		Jiangshanian											489.5
												Steptoean	493 *
									Maentwrogian				493.1 *
		Paibian							Maentwrogian				494
	Miaolingian	Guzhangian			Middle Cambrian			St Davids		Marjumian	Albertian †	Cambrian 4	497
		Guzhangian											Arcadian	498.4
		Drumian												500.5
		Wuliuan								Topazan		Cambrian 3		504.5
		Wuliuan								Delamaran				506.5
	Series 2	Stage 4			Early Cambrian			Caerfai		Delamaran	Waucoban †		Branchian	509
		Stage 4								Dyeran				511 *
		Stage 3								Dyeran		Cambrian 2		514
										Montezuman				514.8 *
										Montezuman			Placentian	517.1
										Begadean				519.9 *
	Terreneuvian	Stage 2												521
	Terreneuvian	Fortunian										Cambrian 1		529
														538.8