Object Record

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Collection Speer Collection
Catalog Number 1999.0001.1180
Object Name Mano
'Iipay Aa Name hapiichaa
Description A fragmented, hand-held grinding stone, also known as a mano in Southern California archaeology. This small bifacial stone is used with one hand for grinding and was shaped in construction. It is circular in shape. The stone material is possibly a sandstone derived from quartz in granite, or it may be a plutonic igneous granitic. It also appears to resemble rhyolite, with muscovite mica and inclusions of quartz. It is medium grained.

This grinding or milling stone ventral side is heavily fractured, the object is fire affected, and the remaining half is polished. About 3/4 of the entire stone remains. This grinding stone dorsal side is polished with heavy use. 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 heavy use. The stone appears to be pecked on all surfaces; pecking increases the grinding surface for greater traction. A stone this size was likely used for fine work perhaps processing medicines or paint pigment.

Length - 2.519", Width - 2.362", Height - 1.141", Weight - 0.297 lb

Provenance This artifact was found within the local San Diego County region, collected 1910-1950.
Date Late Prehistoric (1300-800 YA)LP
Material Volcanic Cobble
Culture Kumeyaay / DiegueƱo
Place of Origin San Diego County
Caption Mano, fragment, volcanic : ventral view, side A (working surface).