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Scrapers <br />5RT139 <br />Seneca II Coal Mine <br />Routt County, Colora~ <br />Scale 1:1 <br />Very~keavy step fractures. <br />Has Eeen resharpened and heavily used. <br />In tre piec <br />Frei roadcut <br />Srall step and <br />scalar fractures <br />Unifaeial Scraper <br />Year <br />lifaeial <br />scale <br />fractwes <br />~(knifa use) <br />Heavily utilized <br /> <br />Platfsrr (skattered} 9 <br />Heavy step 1 <br />fractures <br />Ninute step <br />and scalar <br />fractures <br />ul Heavy step <br />~~~ fractures <br />v <br />Figure 4A. This specimen is an end scraper that has been resharpened <br />until further resharpening is almost impossible, especially in the • <br />central area of the working edge. Separating actual scraping wear <br />from flake scars produced by resharpening is difficult, but the <br />scraper must have been used considerably to require so much re- <br />sharpening. Knife wear in the form of minute bifacial scalar <br />fractures is present along one Lateral margin. Scraping wear is <br />present on the other lateral margin in the form of minute unifacial <br />step and scalar fractures. This wear appears to be real wear as <br />opposed to wear produced by trampling or vehicles, as it is quite <br />regular, rather than random. This dichotomy has been shown exper- <br />imentally (Tringham et a1. 1974). The scraper has been snapped <br />latitudinally. Both portions were recovered in a road. <br />Figure 4B. This is a small thumbnail scraper exhibiting delicate <br />retouch and very small scalar fractures on the working edge. Snap <br />breaks are present where retouch is not, along one lateral margin <br />and the proximal edge. This specimen was also recovered from a <br />road. <br />59 • <br />