218 
INDEX. 
Page. 
Stonewall Spring, water from 71 
Stovepipe Wells, section near 199 
water of 197 
Stratigraphy, columnar section showing — 27 
description of 2C>-35 
Streams, description of 18-19 
Structure. See particular districts. 
Sulphur, occurrence and character of 71 
Sumner Spring. How of 100 
rocks near 10.3, 100,114 
Surveyors Well, rocks near 166, 199 
water of 197 
Syenite, definition of 38 
occurrence and character of 85-86,207-208 
Tanks, character of 21 
relescope Peak, altitude of 201 
Temperature, records of 17 
Tertiary rocks, areas of, economic map 
showing 43 
occurrence and character of 31-34 
ore deposits in 46 
Tertiary time, history in 40-41 
Thimble Peak, rocks of 161 
Thirsty Canyon rocks near 136,137 
Thorp, character of 25 
Timber, character and distribution of 23-24, 
100,119,162,183,202 
Timber Mountain, geology of 32, 137, 153 
topography of 153 
int.iin. altitude of 201 
rocks near 202, 204, 207 
Tippipah Spring, How of 142 
rocks near 121, 122,143,146-147 
Titus Canyon, rocks of 164,175 
Tokop, ore deposits at 189-190 
wells near 183 
Tolicha Peak, economic geology of 142 
geology Of 28,32,132,135, 137, 141 
structure of 142 
topography of 141 
ronopah, description of 25 
Topography, description of 16 17 
See also particular districts. 
Topopah Spring, flow of 142 
Tow ns. character of 25-26 
Trails, character of 26 
Trappman, Bermann, discoveries by 138 
Trappmans Camp, ore deposits at 44*138-139 
ore deposits at, figure showing. 138 
rocks at and near 27,28,132, 133-1 35 
Travertine, occurrence and character of 58 
Triangle Spring, rocks near 199 
Page 
Triangle Spring, water of 197 
Tri-Metallic Mining Company, properties of. 69-70 
Trio mine, ore deposits of 174 
Tueki Mountain, ore deposits of 211 
rocks near 21*4 
Tuffs, occurrence and character of 32, 
72,132-133,192 
Turner, II. W., on climate of district 17 
on geology of district 51-52,57 
work of 15 
Turquoise, occurrence of 129-130 
Twin Peaks, rocks on 113 
r. 
Ulrich. E. < ">.. fossils determined by 57, 
66,120,121,149,155,165,203 
on geology of region 66 
V. 
Valleys, formation of 17 
Vegetation, character of 23-24 
W. 
Wahguyhe Peak, altitude of 161 
rocks of 168-169 
Walcotl C D., fossils determined by 57 
Water occurrence of, signs of 22-23 
Weber eonglomerati . correlation of 30 
occurrence and character of. 30,90,118,120-121 
Weeks, F. 15.. fossils determined by 165 
Wellington, ore deposits al 46,95 
rocks at 48 
Wells, occurrence and character of 21-22 
Wheelbarrow Peak, altitude of 118 
locks on and near 119,122,125 
Bection near, figure showing 119 
Wheelbarrow Spring, flow of . 119 
Whit nock Spring, flow of 119 
rocks near 122, 127, 133-134,140 
Wild Horse Spring, flow of 100 
Willow Springs, flow of 162 
rocks near 165-168 
Wilsons Camp, ore deposits at 46,139 
rocks at 48,135-136 
V. 
yucca Mountain, economic geology of 152 
geology of 32, 150-152 
structure of 152 
topography of 150 
Yucca Pass, rocks near 145-146 
Z. 
Zaphrentis sp., occurrence of 122 
