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The piece certainly has the outline of preform. A side view of the object would be useful.
If it were an adze, you might expect to see some evidence of use on the bit such as hinge fractures. Angle of the bit might be ~60 degrees to a worn ~80 degrees. Here's an 'Aucilla adze' from Florida:
Americus here's four adzes
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.The first two are flint adzes from Illinois.The last are hard stone from maine