End scrapers (Treganza and Malamud, 1950, pl. 20, k-l).—Subrectangular in outline with one of the narrow ends flaked back to a low angle.
Snub-nosed scrapers (ibid., pl. 20, f-g).—Like end scrapers with the exception that the flakes have been removed from the retouched end at a much steeper angle, producing a blunter but stronger working edge.
Cobble scrapers (ibid., pl. 20, c).—Made from a split cobble showing wear along the sharp curved margin. Only slight retouching.
Flake scrapers or knives (fig. 3, g).—Thin flakes monofacially flaked along portions of their peripheries.
Concave scrapers (fig. 3, c).—These are neither common nor are they clearly stylized. They total only nine, all acquired during the second season. Though none are alike, they characteristically display a shallow localized concavity along one edge. In some instances the margin of the concavity shows signs of notable abrasion. Small chips have been sprung from the base of the concavity probably through use. Sizes range from 6 to 10 cm. in diameter with the depressions varying from .5 to 2 cm. Seven specimens were of basalt and one each of chert and porphyry.
Figure 2. Scraper Plane Types
