Type
Zone
Age range
95.81–95.67 Ma

International Timescale

Late Cretaceous
Cenomanian

Ammonite Zonation - Western Interior

Dunveganoceras pondi
Pleisacanthoceras wyomingense
Acanthoceras amphibolum
95.8195.8095.7995.7895.7795.7695.7595.7495.7395.7295.7195.7095.6995.6895.67

Macrostrat

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