|'Iipay Aa Name||hapiichaa|
A fragmented 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 an igneous rhyolite with gold biotite mica. It is coarse grained.
This grinding or milling stone ventral side is polished and pecked, with shouldering. Its dorsal side is polished and pecked; there is a small flake missing on the dorsal edge. There is an area of loss about 1/16 of the total that appears to be an old break due to weathering on the exterior--the area of the break appears a lighter color. 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 use that is both polished and pecked; pecking increases the grinding surface for greater traction.
Length - 4.50", Width - 4.038", Height - 2.204", Weight - 1.564 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: ventral view, side A (polished shouldered working surface).|