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9 <br />• do not produce as much south-facing surface area as they do north-facing <br />surface area. The area consists predominately of sandstone deposits which <br />have been uplifted more in the south than in the north, such that almost <br />all of the moderate slopes are north-facing, and the southern exposures are <br />generally steep eroded faces. Consequently, much north-facing area <br />was surveyed intensively where a more favorable aspect was not present. <br />Aspect was utilized in the same fashion as slope. No area having <br />an unfavorable aspect was rejected without a visual field check to <br />determine whether or not it was suitable for survey in other respects. <br />Both slope and aspect were used as general field guides to deter- <br />mine which areas would be most likely to yield archaeological sites. <br />This does not mean that areas considered to have a low probability of <br />containing sites were ignored, but rather that more emphasis was placed on <br />those areas that had a higher possibility of being the location of <br />past human activities. <br />The third and perhaps the most significant factor that influenced <br />the survey effort was vegetation cover. As in most survey problems, <br />surface vegetation has an immediate and sometimes drastic effect on the <br />results obtained from archaeological reconnaissance. Since survey de- <br />pends upon being able to discern the effects or remains of some sort of <br />human behavior on the ground surface, anything that covers the surface <br />will obviously mask or completely hide those remains. Additionally, <br />dense vegetation can, at times, form a physical barrier that is nearly <br />impossible for the survey crew to penetrate. <br />Bath of the above situations are present in the Williams Fork Ptoun- <br />tains. The area is fairly well watered and supports a dense growth of <br />Gamble's oak, aspen, chokecherry, serviceberry, and sage, especially on <br />