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- Mazon Creek Mazonomya mazonensis Clam 30
Mazon Creek Mazonomya mazonensis Clam 30
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Mazonomya mazonensis (prev. Edmondia) Clam Positive and Negative Bivalves
Middle Pennsylvanian (Carboniferous), Francis Creek Shale, Braidwood, Illinois. USA
Mazon Creek bed nodule deposits.