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DISCOIDAL &
COGGED STONES
7,500 TO 5,000 YEARS AGO
LOS ANGELES COUNTY, CALIFORNIA
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COPYRIGHT
DECEMBER 31, 2011 PETER A. BOSTROM
This picture shows 17 discoid stones that
were collected by Horatio Rust in 1897 on a road grading
construction project in Pasadena, California. Most of them relate to
cogged stone types of artifacts, even the ungrooved examples.
Researchers have reported at least seven different types of cogged stones which have
physical descriptive names such as, beveled, land and grooved,
intermediate, fish vertebra, seastar, truncated and ovoid. One type
is referred to as a "jelly mold" which looks like a cut off end of a
cactus stem. Cogged stones range in size from 1 to 6 inches in
diameter and their notches vary from 1 to 20 with most having
between 8 and 13 notches. Most examples have their notches fairly
evenly spaced.
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