Type
Zone
Age range
92.9–92.08 Ma

International Timescale

Late Cretaceous
Turonian

Ammonite Zonation - Western Interior

Prionocyclus hyatti
Collingnoniceras praecox
Collingnoniceras woollgari
92.992.892.892.892.792.792.692.592.592.592.492.392.392.392.292.292.192.0

Macrostrat

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