|'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 shaped by usewear. It is oval in shape. The stone material is rhyolite with inclusions of plagioclase and orthoclase. It is somewhat vesicular. It is medium grained.
This grinding or milling stone's ventral side is flat, polished and pecked. Its dorsal side is flat, polished and pecked. Striations appearing on the surface suggest that this mano was used in an undulating or back and forth movement. The perimeter sides and ends appear shaped by use. The stone appears to be pecked both deliberately and due to a vesicular quality; pecking increases the grinding surface for greater traction.
Length - 3.310", Width - 3.070", Height - 1.394", Weight - .900 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|
|Caption||Mano, rhyolite: dorsal view, side A (polished and pecked; vesicular).|