Name: Aviculopecten mazonensis Scallop Fossils
Phylum Mollusca; Class Bivalvia; Pectinoida, Aviculopectinidae
Geological Time: Pennsylvanian (~300 m.y.a.)
Size: 18 mm long by 12 mm wide and 21 mm long by 16 mm wide in a 36 mm by 40 mm nodule
Fossil Site: Mazon Creek, Pit 11, Francis Creek shale, Braidwood, Illinois
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