Type
Zone
Age range
94.27–94.15 Ma

International Timescale

Late Cretaceous
Cenomanian

Ammonite Zonation - Western Interior

Nigericeras scotti
Neocardioceras juddii
Burroceras clydense
94.2894.2794.2794.2694.2594.2594.2594.2494.2394.2394.2294.2294.2294.2194.2094.2094.1994.1994.1994.1894.1794.1794.1794.1694.1694.1594.14

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