Object Record

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Collection Speer Collection
Catalog Number 1999.0001.1115
Object Name Discoidal
Description A rare and large discoidal groundstone, possibly an anvil. It may likely date to the Archaic [9000-1300 years ago.] It is a squat, circular, shaped, and double-sided stone with a slight depression on one side and a polished surface on the other. The stone material is a granitic (granite) with pink feldspar and biotite mica. There is no weathering apparent. It is medium grained and shows a fine patina over the surface.

The ventral side of the disc is slightly concave in the center and the use wear is visible as pecking in that small area of 3 inches (7.6 cm) long and 2 inches (5 cm) wide. The dorsal side of the disc has a small smoothed area where use wear is visible as a grinding action. That area is 3 inches (7.6 cm) in diameter.

Dimensions:
Length - 8.267", Width - 8.267", Height - 3.307", Weight - 17 lbs
Provenance This artifact was found within the local San Diego County region, 1910-1950.
Date Indeterminate
Material Granitic
Culture Kumeyaay / DiegueƱo
Place of Origin CA, SDI
Caption Granitic Discoidal: section A, ventral side, center has slight concavity.