Demopolis Chalk, Demopolis Core Hole 2, Noxubee County, Missississi, USA
Age: Campanian
Light Source: Polarized (left), Transmitted (center), Phase Contrast (right)

Demopolis Chalk, U.S. Highway 78 Bypass, Tupelo, Mississippi, Lee County, Mississippi, USA
Age: Campanian
Scanning Electron Micrograph: Magnification 7200x