R Rainbow Bridge National Monument 103 Rainwater 41, 42 Rampton, Calvin L., Utah Governor 8 Reading, additional _104_ References, selected _105_ Relief map, shaded, Arches National Park, described 18, 19 Ribbon Arch 72 Richardson Amphitheater 56 Richardson, Professor 56 Rico Formation 23 Rison, (Mrs.) Esther Stanley 13 Rock formations, sculptured by erosion 35 Rock openings, natural, types 37 Rock types in the park 35 Roosevelt, Franklin D., proclamation 2 Rumel, Hal, photographer 77 “Run, Cougar, Run” 16, 56, 75 S Sagers Wash syncline 86 Salt, occurrence 15 properties critical to formation of salt anticlines 30 Salt anticlines 30, 31, 100 collapse 33, 34 Salt-bearing rock 83 Salt rolls 31 Salt Valley 2, 68, 73, 77, _82_, 83, 92 gravity anomalies 32 Salt Valley anticline 25, 30, 31, 32, 73, 100, 101 collapse 34 fins 42 Salt Valley Wash 3, 74, 82, 83 Salt Wash 35, 55 Anasazi ruins 9 drainage 18 grabens 34 sandstone caves near 10 Salt Wash Sandstone Member, Morrison Formation 14 San Juan Basin, natural gas 15 San Rafael Swell 101, 103 Sand Dune Arch 79