|'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 in construction. It is oval in shape. The stone material is a volcanic with muscovite mica. It is medium grained.
This grinding or milling stone ventral side is very flat with angular shouldering. Its dorsal side is rounded with some grinding. Striations appearing on the surface suggest that this mano was used in an undulating or back and forth movement. Wear marks on the perimeter sides suggest some grinding and there are areas of loss near the dorsal edges. The stone appears to be pecked on the perimeter sides; pecking increases the grinding surface for greater traction.
Length - 5.000", Width - 4.488", Height - 2.440", Weight - 2.888 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, volcanic: ventral view, side A (shouldered working surface).|