S St. Mary’s Glacier, 71 Salida, 17, 21, 35 Salina, 79 Sand, 75, 97-99 Sangre de Cristo Range, 10, 17-18, 35, 47, 61, 69, 73, 90, 105, 106 San Juan Basin, 95 San Juan County, 78 San Juan Formation, 88 San Juan Mountains, 4, 25-26, 35, 52, 65, 69, 77, 85, 86, 87, 88, 105 San Luis Valley, 4, 35, 44, 61, 67, 73, 96, 106 San Miguel Range, 26 Santa Fe Formation, 67, 105 Sawatch Range, 22-23, 35, 39, 69, 82, 106 Sawatch Sandstone, 34, 39, 40 Sedalia, 61 Shadow Mountain Reservoir, 103 Sierra Blanca, 17, 18 Silurian, 7, 42 Silver, 22, 74, 77-91 Silver Cliff, 16, 77, 78 Silver Plume, 78, 81 Silver Plume Granite, 33, 35 Silverton, 4, 26, 74, 77, 78, 85-86, 88 Sinbad Valley, 101 Sneffels, Mt., 87, 88 Sopris, Mt., 24 South Park, 4, 16, 21, 35, 61, 65, 84, 97 South Platte River, 1, 3, 35, 85, 103, 104, 112, 113 Spanish Cave, 106 Spanish Peaks, 10, 18, 62 Specimen Mountain, 66 Springs, 17, 22, 109-110 Steamboat Springs, 97, 109 Summit County, 77 Sunshine, 79 Sunshine Peak Rhyolite, 87 Swandyke Gneiss, 33 T Table Mountain, 8, 62, 111 Telluride, 26, 74, 77, 78 Tenmile Gorge, 21 Tenmile Range, 21, 91 Tertiary, 7, 15, 20, 21, 25, 26, 29, 59-67, 73, 77, 83, 87, 88, 89, 90, 91, 92, 93, 95, 96, 97 Tin, 75 Tincup, 22, 77, 78 Trail Ridge Road, 12, 66 Treasure Mountain Granite, 99 Triassic, 7, 23, 51-52, 93, 101 Trinidad, 8, 61, 96, 97 Trout Creek Pass, 21, 22 Tungsten, 1, 74, 75, 79 Tyndall Glacier, 71 U Uinta Basin, 4, 29, 64, 75, 95 Uinta Mountain Formation, 26 Uinta Mountains, 4, 10, 26-27, 29, 35, 37, 64 Uncompahgre Gorge, 87 Uncompahgre Plateau, 29, 35, 44 Uncompahgre Quartzite, 87 Urad Mine, 92 Uranium, 1, 29, 80, 93 V Vail, 21, 47 Vail Pass, 21 Valmont, 62 Vanadium, 74, 75, 93 Villa Grove, 17 W Walden, 20 Walsenburg, 35, 61, 96 Ward, 78 Water, 76, 103-110 Waunita Hot Springs, 109 Weber Sandstone, 95 West Elk Mountains, 24, 35, 69 Wet Mountains, 16, 35, 61, 95 Wet Mountain Valley, 35 Whiskey Creek Pass, 17 White River, 35, 95 White River Formation, 66 White River Plateau, 28, 29, 35, 43, 107, 109 Williams Canyon, 37, 39 Willow Creek Pass, 20 Willow Creek Reservoir, 103 Wingate Formation, 51, 52, 101 Wolcott, 22, 47 Wolford Mountain, 60 Woodland Park, 110 Woods Lake, 107 Y Yale, Mt., 22 Yampa River, 3, 27, 31, 35, 97 Yule Marble, 24, 99 Z Zinc, 74, 75, 80, 82, 83, 85, 86, 89 Zirkel, Mt., 19 Transcriber’s Notes --Retained publication information from the printed edition: this eBook is public-domain in the country of publication.