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Plesechioceras harbledownense zone

General information
Lower boundary: after 196.5 Ma (based on Sinemurian)
Upper boundary: equal to 190.7 Ma (see scale)
Continent: North America
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See map of collections within this interval
Key correlations
Period: Jurassic
Epoch: Early/Lower Jurassic
Stage: Sinemurian
10 million year bin: Jurassic 1
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Shares top with
Overlaps with
  • Asteroceras varians (196.5 to 190.7 Ma)
  • Coroniceras (196.5 to 190.7 Ma)
  • Interval name: