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 squarish in shape. The stone material is arkosic sandstone derived from granodiorite, feldspar, muscovite, mica and garnets. It is medium-coarse grained and angular.
This grinding or milling stone ventral side is very smooth with some staining. Its dorsal side is rougher with some pitting and a crack. 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 surface on the sides.
Length - 3.779", Width - 3.180", Depth - 1.970", Weight - 1.549 lbs.
|Provenance||This artifact was 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|