Object Record

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Collection Speer Collection
Catalog Number 1999.0001.1402
Object Name Mano
Description A whole hand-held grinding stone, also known as a mano in Southern California archaeology. This unifacial stone was used with one hand for grinding and was shaped in construction. It is oval in shape and light gray in color. The stone material is possibly monzogranite with quartz and feldspar. It is medium to coarse grained.

This grinding or milling stone's ventral side is smooth and flattened. Its dorsal side is humped. Striations appearing on the ventral surface suggest that this mano was used in an undulating or back and forth movement. The stone appears to be slightly pecked on the ventral surface; pecking increases the grinding surface for greater traction.

Dimensions:
Length - 3.991", Width - 3.473", Depth/Thickness - 2.022", Weight - 1.475 lbs.
Provenance Found within the local San Diego County region, collected 1910-1950.
Date Late Prehistoric (1300-800 YA)
Material Possibly monzogranite
Culture Kumeyaay / DiegueƱo
Place of Origin San Diego County
Caption Dorsal view