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SRT139.66 <br />Form: The specimen is a tertiary flake, sub- • <br />rectangular in outline, and biplano in <br />cross-section. The proximal end exhibits <br />a pronounced hinge fracture. Cultural <br />modification is present only on the dorsal <br />face and most prominently on the distal end. <br />Both lateral edges were modified, but not as <br />extensively as the distal end. <br />Material: Red chert <br />Dimensions: 2.73 cm. long x 2.64 cm. wide x .47 cm. thick <br />Retouch: The flake was produced through percussion <br />flaking and exhibits a prominent channel flake <br />scar on the dorsal face. The perimeter is <br />steeply retouched. <br />Functional <br />Interpretation: The location of the unifacial retouch in <br />association with both minute scalar and step <br />fractures indicate a.scraping activity. <br />Positioning of both modification and wear <br />indicates a combination end and side scraping <br />tool. <br />• <br />SRT139.70 <br />Form: The specimen is a biface fragment featuring <br />a medial snap. Lateral edges are slightly <br />excurvate as is the basal area; corners and <br />haft elements are absent. Cross-section is <br />lenticular. Still evident on both the dorsal <br />and ventral faces are the original flake <br />scars produced during manufacture. <br />Material: Clear chalcedony <br />Dimensions: 1.17 cm. long x 1.30 cm. wide x .22 cm..thick <br />Retouch: Irregular bifacial pressure flaking and peri- <br />pheral retouch are present, however, the <br />retouch is located only on the ventral face. <br />Functional <br />Interpretation: The lack of any noticable wear and the absence <br />of a haft element suggest incompletion in <br />the manufacture process. The artifact is <br />probably a preform. <br />• <br />42 <br />