|'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 circular in shape. The object is desiccated and cracked; it has been fire affected. The stone material is a sandstone (sedimentary) with biotite and muscovite mica and areas of reddish weathering. It has been suggested that the two micas indicate higher radioactivity. It is fine grained.
This grinding or milling stone ventral side is smooth and rounded. Its dorsal side is smooth and rounded with a large crack and a large chip missing. Striations appearing on the surface are not visible due to the fire desiccation; it isn't known if this mano was used in an undulating or back and forth movement or rotary. Wear marks on the perimeter sides suggest grinding and pecking. Pecking increases the grinding surface for greater traction.
Length - 3.503", Width - 3.307", Height - 1.614", Weight - 1.167 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, sandstone: ventral view, side A (dessicated smooth working surface)|