|'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 rectangular in shape. The stone material is a rhyolite (igneous, Mission Valley/Poway conglomerate); there is one rust stained inclusion on the dorsal side. It is coarse grained.
This grinding or milling stone ventral side is flat and polished. This grinding stone dorsal side is saddlebacked in shape with white deposits coming up from the perimeter sides. 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 grinding. The stone appears to be pecked on all sides, most heavily on the perimeter; pecking increases the grinding surface for greater traction.
Length - 4.527", Width - 3.858", Height - 1.732", Weight - 1.905 lbs.
|Provenance||This artifact was found within the local San Diego County region, collected 1910-1950.|
|Date||Late Prehistoric (1300-800 YA)L|
|Culture||Kumeyaay / Diegueño|
|Place of Origin||San Diego County|
|Caption||Mano, rhyolite: ventral view, side A (flat, polished working surface).|