|'Iipay Aa Name||hapiichaa|
A whole hand-held grinding stone, also known as a mano in Southern California archaeology. This unifacial stone is used with one hand for grinding and was shaped in construction but shouldered through use. It is ovoid in shape. The stone material is a pegmatic quartzite (metamorphic) with muscovite mica. The grains appear crushed with layers rather than concoidal. Not oily. It is fine grained.
This grinding or milling stone ventral side is smooth with some shouldering. This grinding stone dorsal side is rougher and appears lightly used, if at all. 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 use, especially extending from the ventral site. The stone appears to be unpecked on the ventral surface; pecking increases the grinding surface for greater traction.
Length - 3.874", Width - 3.464", Height - 2.244", Weight - 1.50 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, quartzite: ventral view, side A (saddled, shouldered working surface)|