|'Iipay Aa Name||hapiichaa|
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 not shaped but is shouldered in usewear. It is an oval shape. The stone material is sandstone with some white powdery substance, probably caliche (calcium carbonate). It has fine traces of gold mica. It is course-grained.
This grinding or milling stone's ventral side is smooth and polished with some deposits that look like caliche (calcium carbonate). Its dorsal side is less polished with more pecking (perhaps due to the nature of the stone). Striations appearing on the surface suggest that this mano was used in an undulating or back and forth movement. Worn marks on the perimeter sides show some usewear and shouldering. The stone appears to be pecked on the some grinding surfaces; pecking increases the grinding surface for greater traction.
Length - 4.015", Width - 3.07", Depth/Thickness - 1.6", Weight - 1.05 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|