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
International Chronostratigraphic Timescale | Cambrian of North America | Cambrian of Britain | |||||
---|---|---|---|---|---|---|---|
Cambrian | Furongian | Stage 10 | Franconian †/Dresbachian/Millardan | Merioneth | Dolgellian/Trempealeauan | 485.4 | |
Sunwaptan | 487.5 | ||||||
Festiniogian | 489.2 * | ||||||
Jiangshanian | 489.5 | ||||||
Steptoean | 493 * | ||||||
Maentwrogian | 493.1 * | ||||||
Paibian | 494 | ||||||
Miaolingian | Guzhangian | Marjumian | Albertian † | St Davids | 497 | ||
Drumian | 500.5 | ||||||
Wuliuan | Topazan | 504.5 | |||||
Delamaran | 506.5 | ||||||
Series 2 | Stage 4 | Waucoban † | Caerfai | 509 | |||
Dyeran | 511 * | ||||||
Stage 3 | 514 | ||||||
Montezuman | 514.8 * | ||||||
Begadean | 519.9 * | ||||||
Terreneuvian | Stage 2 | 521 | |||||
Fortunian | 529 | ||||||
538.8 |