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Pennsylvanian Bivalve From Mazon Creek
BIVALVES
Stock Number XIBI08

Name:   Aviculopecten mazonensis
Age:  Pennsylvanian
Formation:  Carbondale Formation
Location:  Braidwood, Illinois
Size:  Concretion is 1.6 inches across
This specimen is not for sale
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Here is a fine example of a Paleozoic bivalve. This is Aviculopecten mazonensis from the famous Mazon Creek area of Illinois. This bivalve is well preserved in a siderite concretion. Both halves of the concretion are present, so both part and counterpart of the fossil are intact. This clam exhibits good detail - the radiating ornamentation of the bivalve is easily seen. This is a nice specimen of Aviculopecten from the Pennsylvanian.