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
  • 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 TimescaleCambrian EpochsCambrian of BritainCambrian of AustraliaCambrian of North AmericaCambrian of ChinaCambrian of KazakhstanOrdovician of the Baltic
OrdovicianLate OrdovicianHirnantianHarjuPorkuni443.8
KatianPirgu445.2
Vormsi449.6 *
NabalaJohvi †450 *
ViruRakvere450.6 *
Oandu452 *
SandbianKeilaIdavere †453
Haljala453.9
Kukruse456.4 *
UhakuAluoja †457.5 *
Middle OrdovicianDarriwilian458.4
Lasnamagi458.9 *
Aseri460.4 *
OelandKunda462.9 *
Valaste †/Hunderum464.3 *
VolkhovLangevoja †/Vaana/Saka467.1 *
Dapingian467.3
Billingen469.3 *
Early OrdovicianFloian470
Latorp †470.1 *
Hunneberg473.7 *
TremadocianUngurian477.7
Varangu481.3 *
Pakerort482.2 *
CambrianFurongianStage 10Late CambrianMerionethDolgellian/TrempealeauanDatsonianFranconian †/Dresbachian/MillardanNiucheheanTaoyuanian †Batyrbaian485.4
486.3 *
486.5
Payntonian486.8 *
Sunwaptan487.5
Festiniogian489.2 *
JiangshanianIverianJiangshanian489.5
Aksaian490.7 *
Sakian492.2 *
Steptoean493 *
Maentwrogian493.1 *
PaibianIdameanPaibian494
Waergangian †/Youshuanian494.9 *
MiaolingianGuzhangianMiddle CambrianSt DavidsMindyallanMarjumianAlbertian †GuzhangianWangcunian †Ayusokkanian497
Boomerangian499
499.5
DrumianUndillanDrumianZhanaarykian500.5
FloranTuesaian503
WuliuanTempletonianTopazanWuliuan/Taijangian504.5
505.3
Delamaran506.5
Ordian507.8 *
Series 2Stage 4Early CambrianCaerfaiWaucoban †Duyunian509
Toyonian510 *
510.8 *
Dyeran511 *
Botomian512.5 *
Stage 3Nangaoian514
Montezuman514.8 *
Atdabanian515.6 *
Begadean519.9 *
TerreneuvianStage 2MeishucunianTommotian521
525.5
Fortunian529
Jinnigian530.7
538.8