Type
Zone
Age range
93.55–93.45 Ma

International Timescale

Late Cretaceous
Turonian

Ammonite Zonation - Western Interior

Mammites nodosoides
Vascoceras birchbyi
Pseudaspidoceras flexuosum
93.5593.5593.5493.5393.5393.5393.5293.5293.5193.5093.5093.5093.4993.4893.4893.4793.4793.4793.4693.4593.45

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