Type
Zone
Age range
96.08–95.98 Ma

International Timescale

Late Cretaceous
Cenomanian

Ammonite Zonation - Western Interior

Acanthoceras bellense
Acanthoceras muldoonense
Acanthoceras granerosense
96.0896.0896.0796.0696.0696.0696.0596.0596.0496.0396.0396.0396.0296.0296.0196.0096.0096.0095.9995.9895.98

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