This early stage biface is one of 11 bifaces (see
McKinnis cache) discovered during a land leveling operation in St.
Louis County, Missouri. It's an early stage biface that illustrates
"classic" Clovis flake removal technique. Large percussion flakes have
been removed from several different directions. It has been demonstrated
that a rocker-punch technique or indirect style of flaking may be the
way Clovis people were making these small and the very large platter
biface cores. Clovis biface reduction was achieved by removing large
edge-to-edge percussion flakes from sides, corners and ends. This is a
lithic technology that was no longer in use in post-Clovis cultures. The intended purpose for this early stage
preform was probably to make a fluted point. This biface is made of
Burlington chert and measures 4 3/4 inches (12 cm) long, 2 5/8
inches (6.7 cm) wide and 3/4 inch (1.9 cm) thick.
THE McKINNIS CACHE SITE
In 1996 a cache of 11 bifaces and 12 core blades were discovered on land that was being leveled for houses. The site is located on a hill top and within 2 miles of the Missouri River in St. Louis County, Missouri. This cache was made with stone tool manufacturing technology that relates to the Clovis culture. The largest artifact in the cache is a basally thinned late stage Clovis point preform. A base of a Clovis point was also found near this cache.
This picture shows three views of the original McKinnis cache biface.