ammonites
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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
Overlaps with
  • Franziceras (201.6 to 196.6 Ma)
  • Interval name: