Object Record

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Collection Speer Collection
Catalog Number 1999.0001.1334
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 circular in shape. The object is desiccated and cracked; it has been fire affected. The stone material is a sandstone (sedimentary) with biotite and muscovite mica and areas of reddish weathering. It has been suggested that the two micas indicate higher radioactivity. It is fine grained.

This grinding or milling stone ventral side is smooth and rounded. Its dorsal side is smooth and rounded with a large crack and a large chip missing. Striations appearing on the surface are not visible due to the fire desiccation; it isn't known if this mano was used in an undulating or back and forth movement or rotary. Wear marks on the perimeter sides suggest grinding and pecking. Pecking increases the grinding surface for greater traction.

Dimensions:
Length - 3.503", Width - 3.307", Height - 1.614", Weight - 1.167 lbs.



Provenance This artifact was found within the local San Diego County region, collected 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 (dessicated smooth working surface)