ammonites

Freboldi zone

General information
Lower boundary: equal to 186.7 Ma (see scale)
Upper boundary: equal to 185.7 Ma (see scale)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Jurassic
Epoch: Early/Lower Jurassic
Stage: Pliensbachian
10 million year bin: Jurassic 2
Contained within
  • Pliensbachian
  • Late/Upper Pliensbachian
  • Early/Lower Pliensbachian
  • Spinatum
  • Margaritatus
  • Davoei
  • Ibex
  • Jamesoni
  • Ururoan
  • Early/Lower Jurassic
  • Herangi
  • Jurassic
  • Mesozoic
  • Sherman
  • Phanerozoic
    • Previous intervals
  • Whiteavesi
  • Imlayi
  • Tetraspidoceras
    • Next interval
  • Kunae
    • Appears in scale
  • Palfy North American Ammonite Chrons (2000)

    • Interval name: