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03 <br />• utilized flaxen. Twenty-seven specimens. <br />Description: there is evidence of use on one or more edges. These <br />show no signs of intentional modification of either edge or form, and <br />appear to have been used only slightly. The assumption could be made <br />that they were picked up, used as needed, and discarded after a short <br />time. <br />Materials: chert and quartzite. <br />Size range: the utilized flakes are generally smaller than those which <br />show evidence of modification. <br />Nammerstones: These items make up a very limited portion of the total <br />co leTction. Only five hammers tones were recovered, and these are split <br />between unmodified and modified cobble tools depending upon whether any <br />intentional changes have been made on the natural cobble. <br />Hammerstones: unmodified cobble, Type ZA. Tw0 Specimens (Fig. 10a, c). <br />Description: tools are well-worn river cobbles with no artificial modi- <br />fication. Use marks are limited to battering and crushing on one or more <br />ends. <br />Materials: quartzite and granitic. <br />Edge wear: battering on extreme ends ranging from minimal with no flat- <br />tening, to extreme flattened, with occasional spalling. <br />Size range: length, 89-111 mm.; width, 44-96 mm.; and thickness, 33-61 mm. <br />Xammerstones: modified cobble, Type ZB. <br />Description: large heavy cobble with one or more percussion flakes re- <br />moved. Codification of the specimens in this collection did not aid <br />appreciably in forming a hammering surface. <br />Materials: quartzite and chert. <br />Edge wear: ranges from minimal battering to well-defined flattening. <br />Size range: length, 98-104 mm.; width, 48-108 mm.; and thickness, 28- <br />81 mm. <br />Special notes: flakes struck from one specimen form a reasonably sharp <br />cutting edge, but no apparent use of that edge is visible. <br />choppers. The choppers are differentiated on the basis of the kind of <br />modification present. In the specimens recovered, most were bifacially <br />percussion flaked, with one chopper that was bifacially worked on one edge <br />and unifacially worked on another portion of the tool. <br />Choppers: bifacial choppers, Type ZIR. $iX Specimens (Fig. lOb). <br />Description: medium to large cobble, with bifacial percussion flaking from <br />the sinuous chopping edge. They have an irregular to oval outline. <br />Materials: chert, quartz, and quartzite. <br />Flaking pattern: one with circumferential flaking and four with partial <br />• flaking. <br />