Cog Stone, unknown date
Milling Stone Horizon peoples; Southern California
Limestone; 3 1/2 x…

Cogged Stone

ClassificationsOrganic Materials-stones-worked

Made AtCalifornia, United States, North America

MediumLimestone

Dimensions3 1/2 × 3 1/2 × 1 in. (8.9 × 8.9 × 2.5 cm)

Credit LineGift of the James Irvine Foundation.

Object number11641

DescriptionSketch on card. Associated with 11640 to 11697.
Brown linestone disc. Both faces flat. Cogs made by cutting 9 wide rounded grooves not equally spaced around edge.Grooves vary from .73" to 1" wide depth of grooves about .25". Ridges are round over from one groove to the next. Diameter, approx. 3.50"; thickness1" one face accidentally scarred. Probably by farm machines.

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