One hundred and four specimens are classed as handstones or handstone
fragments. Of these 50 could not be classified further except that 40
were of igneous rock and 10 of sandstone. The general data pertaining
to handstones is summarized in the chart. The largest of these is 8 ×
4 inches, the smallest 4 × 3 inches. All appear to have been used in
one hand. Seventy-five percent are made of igneous rock, usually of a
metamorphic type such as schist. This choice was probably due to the
scarcity of good sandstone in the area. There are two basic types,
those used on one and those used on two sides. For both these groups
there is a variant which has a center ridge formed by the meeting of
two grinding surfaces on each face. Probably the simple motion of
pushing forth, rocking, and then pulling back caused this. One of
these has the ridges on its two sides at right angles to each other.
Some specimens are pecked. These forms seem to lack distributional
significance.