Object Record

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Collection Speer Collection
Catalog Number 1999.0001.1386a
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 unusually angular with distinct edges and is rectangular, or loaf-shaped. The stone material is a sandstone (sedimentary) with muscovite and gold biotite mica perhaps indicating increased radioactivity in the stone. It is fine grained.

This grinding or milling stone's ventral side is flat with squared edges. There are some scalloping marks on ventral width edges. Its dorsal side is flat and split by a clear angular line of use or stone material change; one side is smooth and the other is pecked. 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 and come to sharp edges, squared. The stone appears to be pecked heavily on the ventral surface; pecking increases the grinding surface for greater traction. There is a continuous white accretion on the dorsal surface and one side edge that is either the eroding cortex revealing stone underneath or some type of weathering.

Length - 4.370", Width - 3.307", Height - 1.535", Weight - 1.481 lbs.

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