|'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 stone material is a granitic (diorite) with muscovite and possibly gold (biotite) mica and inclusions of dark gray. It is fine grained.
This grinding or milling stone ventral side is worn, chipped around the exterior and pecked Its dorsal side is smoother and darker with a very dark inclusion 1 1/4 inches (3cm) long. 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 some grinding however one end is particularly abraded. The stone appears to be pecked/unpecked on the all sides; pecking increases the grinding surface for greater traction.
Length - 3.897", Width - 3.425", Height - 1.456", Weight - 1.401 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|