The Village Crier, vol. 4, no.39 (November 30, 1972) describes some of the tools found on the Fermilab site and what they were used for

Pictured in the article are very delicate Fox Valley Clipped Wings, which are uncommon types of arrowheads. Mr. Mier, who found the arrowheads, believed that they were produced for special uses other than hunting.

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Artifacts on Display to Show Fermilab's Prehistoric History