A whole hand-held grinding stone, also known as a mano in Southern California archaeology. This unifacial stone was used with one hand for grinding and was shaped in construction. It is oval in shape and light gray in color. The stone material is possibly monzogranite with quartz and feldspar. It is medium to coarse grained.
This grinding or milling stone's ventral side is smooth and flattened. Its dorsal side is humped. Striations appearing on the ventral surface suggest that this mano was used in an undulating or back and forth movement. The stone appears to be slightly pecked on the ventral surface; pecking increases the grinding surface for greater traction.
Length - 3.991", Width - 3.473", Depth/Thickness - 2.022", Weight - 1.475 lbs.
|Provenance||Found within the local San Diego County region, collected 1910-1950.|
|Date||Late Prehistoric (1300-800 YA)|
|Culture||Kumeyaay / Diegueño|
|Place of Origin||San Diego County|