A whole hand-held grinding stone, also known as a mano in Southern California archaeology. This bifacial stone is used with one hand for grinding and was shaped in construction. It is round in shape. The stone material is Grandiorite with garnets. It is medium grained and gray in color.
This grinding or milling stone's ventral side is very smooth. Its dorsal side is rougher. Striations appearing on the surface suggest that this mano was used in an undulating or back and forth movement. Construction of the stone created a smooth/ textured surface on the ventral and dorsal sides. The stone appears to be pecked on the dorsal surface; pecking increases the grinding surface for greater traction. There is an area of stone loss on the perimeter of the mano.
Length - 3.614", Width - 3.262", Depth/Thickness- 1.626", Weight - 1.25 lbs.
|Provenance||Found within the local San Diego County region, collected 1910-1950.|
|Material||Granodiorite with garnets|
|Culture||Kumeyaay / Diegueño|
|Place of Origin||San Diego County|