ammonites

Widebayense zone

General information
Lower boundary: equal to 171.6 Ma (based on Bajocian)
Upper boundary: before 168.4 Ma (based on Rotundum)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Jurassic
Epoch: Middle Jurassic
Stage: Bajocian
10 million year bin: Jurassic 4
Contained within
  • Middle Jurassic
  • Temaikan
  • Kawhia
  • Jurassic
  • Mesozoic
  • Sherman
  • Phanerozoic
    • Previous intervals
  • Aalenian
  • Howelli
  • Scissum
  • Westermanni
  • Concavum
  • Murchisonae
  • Opalinum
  • Late/Upper Aalenian
  • Middle Aalenian
  • Early/Lower Aalenian
    • Next interval
  • Epizigzagiceras
    • Shares base with
  • Bajocian, Discites, Garantiana, Laeviuscula, Late/Upper Bajocian, Parkinsoni, Sauzei, Subfurcatum
    • Overlaps with
  • Early/Lower Bajocian (171.6 to 168.4 Ma)
  • Rotundum (171.6 to 168.4 Ma)
  • Oblatum (171.6 to 168.4 Ma)
  • Kirschneri (171.6 to 168.4 Ma)
  • Crassicostatus (171.6 to 168.4 Ma)
  • Humphresianum (171.6 to 168.4 Ma)
    • Appears in scale
  • Palfy North American Ammonite Chrons (2000)

    • Interval name: