Part 5

S Sabinal River 46 Salina, Kans. 4 Saline River 4, 48 San Antonio, Tex. 47 Sand dunes 44, 49 Sand Hills, Nebr. 29 Sangre de Cristo Mountains 7, 45, 46 Scotts Bluff National Monument 27, 42 Sedimentation 10, 11, 32 Shonkin Sag 35 Sinkholes 47, 48 Skyline Drive, Canon City, Colo. 43 Smith River 38 Smoky Hill River 4, 48 Smoky Hills 48, 49 Soil development 16 Solomon River 4, 48 Solution cavities 45, 47, 48 Sonora, Tex. 47 South Dakota 20, 29, 33, 34 South Dakota Badlands 16 South Platte River 4, 7, 42, 43, 44 Spanish Peaks 19, 24 Spruce trees 2 Stream deposition 11, 32 Summary 49 Sun River 38 Superior Upland 5, 10 Sweetgrass Hills 33 Sylvan Lake 20

T Tapirs 16 Tertiary Period 42, 43, 45, 46, 48 Teton River 33 Texas 7 Theodore Roosevelt National Memorial Park 35, 40 Till 34 _Titanotheres_ 16 Tongue River 39 Trails 2 Trees 1, 2, 7 Triassic Period 21 Triceratops 16 Trinidad, Colo. 25

U Uplift 11, 16, 19, 32, 37

V Valley development 39 Vaughn, N. Mex. 45 Vegetation 1, 2, 7, 10, 16 Vermejo Formation 16 Volcanoes 16, 20, 40

W Walsenburg, Colo. 24 Warping 11 Well-drilling 11 West Nueces River 46 White River 29, 39, 40 White River Group 16, 40, 44 Williston basin 11, 16, 33 Wind Cave 21 Wind deposition 44 Wyoming 20, 39

Y Yellowstone River 33, 38

Transcriber’s Notes

--Retained publication information from the printed edition: this eBook is public-domain in the country of publication.

--In the text versions only, text in italics is delimited by _underscores_.