July 28 Friday Camp IV. After breakfast spent the morning on Camp Bluff Found fragments of Dinosaur bones in the Red beds and in the green shale immediately above but nothing of value. Collected some marine Jurassic fossils which are quite rare and returned to camp. In the afternoon drove Westward to the end of Camp Bluff where the entire strata can be seen in a fine anticline Here the arch is shown in two thousand feet while on each side the strata dip somewhat at about 25° but another at about 65° very northward in the high Camp Bluff at the base of which is the W.P.R. R. At this section not is clear than the termination of the arch and the curvature or the domed uplift Farther to the west in the valley of Rock Creek with its numerous meanders. The Sketch on the next page show the anticline at this eastern end. We intended to photograph this section but heavy rain prevented. See also at this section our field notes ```**day of Oarath Alipodum a strike of many**