One unifacial lithic tool from CA-SDI-23,233 and one groundstone artifact from CA-SDI-23,234 on the Otay Mesa in San Diego, California were submitted for protein residue (CIEP) analysis. Both sites are described as diffuse lithic scatters, and the lithics were submitted to characterize tool use and site functions.
Linda Scott Cummings (Sat,) studied this question.