Object Record

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Collection Speer Collection
Catalog Number 1999.0001.1328
Object Name Mano
'Iipay Aa Name hapiichaa
Description 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 rectangular in shape. The stone material is a rhyolite (igneous, Mission Valley/Poway conglomerate); there is one rust stained inclusion on the dorsal side. It is coarse grained.

This grinding or milling stone ventral side is flat and polished. This grinding stone dorsal side is saddlebacked in shape with white deposits coming up from the perimeter sides. 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 grinding. The stone appears to be pecked on all sides, most heavily on the perimeter; pecking increases the grinding surface for greater traction.

Dimensions:
Length - 4.527", Width - 3.858", Height - 1.732", Weight - 1.905 lbs.

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