View Original: | Placenticeras costatum, Cretaceous, Pierre Shale Formation, Cheyenne River, Pennington County, South Dakota, USA - Houston Museum of Natural Science - DSC02011.JPG (3240x4320) | |||
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Keywords: Placenticeras costatum, Cretaceous, Pierre Shale Formation, Cheyenne River, Pennington County, South Dakota, USA - Houston Museum of Natural Science - DSC02011.JPG Exhibit in the Houston Museum of Natural Science Houston Texas USA Photography was permitted in the museum without restriction Daderot 2012-10-22 15 37 41 Daderot cc0 cc0 Ammonites in the Houston Museum of Natural Science Herrickiceras costatus |