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 rectangular in shape and is light brownish gray with some weak red. The stone material is Arkosic Sandstone with feldspar and quartz. It is medium grained.
This grinding or milling stone's ventral side is smooth with rough edging. Its dorsal side is flat and slightly pitted and pecked; pecking increases the grinding surface for greater traction. Striations appearing on the surface suggest that this mano was used in an undulating or back and forth movement.
Length - 4.363", Width - 3.566", Depth/Thickness - 1.776", Weight - 1.856 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|