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This picture shows five examples of well rounded
various sites in southern Illinois.
They all show heavy battering
over their entire
surfaces. They could have been used to make ground
stone tools like celts or axes. Or some of them could
have been used
as percussion flakers to make knives,
spades or any one of a variety
of different flaked stone
artifacts. The materials are all hard
stones like chert
and granite. They range in size from 2 inches (5.1
to 3 inches (7.6 cm) in diameter.
SEPTEMBER 30, 2006 PETER A. BOSTROM