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Scaphites whitfieldi
934
Type
Zone
Age range
91.34–90.65
Ma
International Timescale
Late Cretaceous
Turonian
Ammonite Zonation - Western Interior
Scaphites nigricollensis
Scaphites whitfieldi
Scaphites warreni
91.3
91.3
91.3
91.2
91.2
91.1
91.0
91.0
91.0
90.9
90.8
90.8
90.8
90.7
90.7
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