|'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 unshaped in construction; it is shouldered by usewear. It is oval in shape and is eroded roughly. The stone material is a vesicular basalt, coarsely porphyritic. It is very coarse grained.
This grinding or milling stone's ventral side is flattened and pecked with a brownish stain. Its dorsal side is saddle-backed, sinking in, smoother than the ventral side. 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 produce shouldering on the dorsal side. The nature of the stone creates a natural pecking on the surfaces; pecking increases the grinding surface for greater traction.
Length - 4.763", Width - 3.031", Height - 1.299", Weight - 1.104 lbs.
|Provenance||This artifact was found within the local San Diego County region, 1910-1950.|
|Date||Late Prehistoric (1300-800 YA)|
|Culture||Kumeyaay / Diegueño|
|Place of Origin||San Diego County|
|Caption||Mano, vesicular basalt: dorsal view, side A (sway backed, smooth).|