C0071 ?Aviculopecten mazonensis + ?Mazonomya mazonensis
BOTH HALVES SIDERITE CONCRETION, SPLIT BY HAMMER BLOW. Aviculopecten SPECIMEN 12mm X 11mm (1/2" x 1/2"). Mazonomya SPECIMEN 10mm X 6mm (7/16" x 1/4").
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Photo by Mark Kmiecik
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