Seven pebble hammerstones were found in the general excavations. Most of
them were either sandstone or chert and of nondescript shape ranging in
size from 4 to 8 cm. in diameter. Many of the sandstone specimens showed
use as grinding Stones as well as hammerstones, again pointing up the
multiple tool use of pebbles. The chert pieces were not shaped, showing
only the natural weathered surfaces except where they had been used.