Sandstone fins 41, 42 Schaafsma, Polly, quoted 10, 12 Scenic drive, Moab to Cisco 16 “Scenic Inch,” Pacific Northwest Pipeline 15 Sedimentary rocks 20 modes of deposition 99 Seven Mile-Moab Valley anticline 26, 32, 57 Sevenmile Canyon 15 Sheep Rock 63 Skyline Arch 83 Slick Rock Member, Entrada Sandstone 34 Entrada Sandstone, composition 41 high fins and pinnacles 63, 79, 86 hiking trail between fins 90 park road cutting 57 salmon 77 The Windows section 71 Tunnel Arch 46 vertical arches 42, 44 Slumping of sediments, irregular 50 Snow 41, 51 Sonic booms, dangers posed to arches 16, 17 South Window 40, 68, 71 Spanish explorers 12 introduction of horses to this country 10 Squaw Flat Campground 16 Stanley, Esther 13 (Mrs.) Flora 13 Volna 13 Stevens, Dale J. 40, 41, 63, 90, 98 Strata, lateral changes across the park 22 Sundance Kid 12 Sunset Crater National Monument 103 Supersonic flights banned, Moab-Times Independent 17 Suspension bridge, Colorado River 16