Of the total number of flakes recovered certain appeared
technologically distinctive and were classified as prismatic. The
primary characteristics of these are a length exceeding twice the
width, a striking platform at one end with a small bulb of percussion
and ripple marks radiating from it. In addition, most of these exhibit
a longitudinal ridge or ridges formed by facets intersecting at a low
angle, representing the intersection of former flake scars. Most of the
striking platforms are plain, but about 30 percent show a series of
tiny flake scars which may be evidence of preparation. They range in
length from 2¼ to ⅝ inches and in width from ³/₁₆ to ¾ inches.
Sixty-two of these show signs of use. Thirty had apparently served as
gravers (see above). Thirty-two show usage marks caused by cutting,
and 14 of these had served secondarily as small scrapers. About 80
percent of the utilized prismatic flakes are of a flinty material.
The remainder are of quartzite. Of the unmodified specimens, about 65
percent were of flinty quartz, 30 percent of quartzite, and 5 percent
of quartz.
[Illustration: FIGURE 39—A-F, perforators. G, flake knife. H, hafted
knife. Actual size.]
[Illustration: FIGURE 40—Prismatic flakes. A-I, gravers. J-L, cutting
edges. Actual size.]
[Illustration: FIGURE 41—Prismatic flakes, cutting implements. Actual
size.]