|'Iipay Aa Name||hapiichaa|
A whole hand-held grinding stone, also known as a mano in Southern California archaeology. It also appears to have use as a pestle. This bifacial stone is used with one hand or two hands for grinding and was unshaped; it has several areas abraded by usewear. It is oval in shape. The stone material is a rhyolite with muscovite mica and possibly some weathered biotite, gold mica. It is a highly polished cobble, perhaps from water action. It is fine grained.
This grinding or milling stone's ventral side is lightly abraded with some pecking. Its dorsal side is lightly abraded with some pecking. Striations appearing on the surface suggest that this mano was used both in an undulating or back and forth movement and a rotary motion on the ends. The perimeter sides and ends indicate use as a pestle with wear patterns that reflect grinding or pounding against a bowl or rounded surface. The stone appears to be slightly pecked on the grinding surfaces; pecking increases the grinding surface for greater traction.
Length - 5.590", Width - 3.5", Depth - 2.362", Weight - 2.6 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|