Franconian age

497 - 485.4 Ma

The definition of this interval in the timescale Cambrian of North America is taken from the following source:

  • 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

There are intervals in 9 timescales which overlap this one. show

This interval is no longer in current use

This interval is used in the definition of 214 collections

A total of 2406 collections with 12293 occurrences lie within this time span

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International Chronostratigraphic TimescaleCambrian of North AmericaCambrian of Siberia
CambrianFurongianStage 10Franconian †/Dresbachian/MillardanBatyrbaianTavgian †Ketyan †/Yurakian485.4
Sunwaptan487.5
Jiangshanian489.5
Aksaian490.7 *
Sakian492.2 *
Steptoean493 *
Paibian494
Ensyan †/Maduan/Nganasanian494.7 *
MiaolingianGuzhangianMarjumianAlbertian †Ayusokkanian497
Mayan/Menevian499.5
Drumian500.5
WuliuanTopazanAmgan/Solvan504.5
Delamaran506.5
Series 2Stage 4Waucoban †509
ToyonianLenian †510 *
Dyeran511 *
Botomian512.5 *
Stage 3514
Montezuman514.8 *
Atdabanian515.6 *
Begadean519.9 *
TerreneuvianStage 2Tommotian521
Nemakit-Daldynian525.5
FortunianManykaian †529
538.8