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A <br />at the bottom of the "U" and limited rock outcrops on each flank of the "U". <br />The open end of the "U" faces East toward Deer Creek Canyon Road. The <br />maximum height of the back of the "U" is about 40 feet with a trickling of <br />water into the quarry entering along the North flank of the "U". The <br />backside of the "U" appears to be formed primarily by exposure of one <br />bedrock joint surface, striking 175 degrees with an average dip of 77 <br />degrees to the East (Figure 9). At the time of the field examination, small <br />amounts of water could be seen seeping from fractures in the head wall of <br />the "U". <br />The lower North flank of the second bench is formed by a soil slope which <br />is composed of a sand to cobble-sized materials. Much of the slope is <br />revegetated, however, some recent appearing small slumps could be seen <br />in the overburden, probably due to the higher than normal spring <br />precipitation. <br />The upper portion of the North flank of the "U" shaped excavation above the <br />bench is composed primarily of bedrock with a' predominant joint pattern <br />dipping into the slope, i.e., to the West with a joint spacing of one to two <br />feet. Thus in Figure 10, you effectively see the joints appearing on end. <br />This joint surface on the North flank of the second bench strikes 292 <br />degrees, with an average dip of 60 degrees to the West. Between this rock <br />face and curving around to the upper end of the East wall, is a section of <br />pit wall composed of soil and large blocks of rock, many of which appear <br />to be insitu. The different orientations of the foliation joints between the "U" <br />flank and the head of the East wall could be explained by a change of <br />foliation direction due to a fold, or a possible buried shear between these <br />two bedrock exposures. <br />6 <br />