ammonites

Euphyllites zone

General information
Lower boundary: after 201.6 Ma (based on Hettangian)
Upper boundary: before 196.6 Ma (based on Franziceras)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Jurassic
Epoch: Early/Lower Jurassic
Stage: Hettangian
10 million year bin: Jurassic 1
Contained within
  • Mesozoic
  • Sherman
  • Phanerozoic
    • Previous intervals
  • Triassic
  • Late/Upper Triassic
  • Rhaetian
  • Balfour
  • Otapirian
  • Misikella ultima
  • Misikella rhaetica
  • Misikella posthernsteini-hernsteini
  • Misikella bidentata-posthernsteini
    • Next intervals
  • Canadensis
  • Pseudaetomoceras
    • Shares base with
  • Angulata, Aratauran, Early/Lower Hettangian, Early/Lower Jurassic, Herangi, Hettangian, Jurassic, Late/Upper Hettangian, Liasicus, Middle Hettangian, Planorbis, Psiloceras
    • Overlaps with
  • Franziceras (201.6 to 196.6 Ma)
    • Appears in scale
  • Palfy North American Ammonite Chrons (2000)

    • Interval name: