102 
INDEX. 
Page. 
Solutions, intrusion of 8, 21, 75-76, 85 
time of 76 
metamorphisrn by 49, 85-86 
source of 75-76, 78-79, 85-86 
temperature of 78-79 
See also Laccoliths. 
Southern Cross deposit, view of 68 
Spencer, A. C, on ore deposition 91 
Spurr, J. E., on ore deposits 93-94 
Stratigraphy, figure showing 17 
outline of 63 
Stutzer, O. , on ore deposition 94 
Sulphide ore, occurrence of 94-95 
Sulphur, occurrence of 7,72 
Swett Hills, erosion at, view of 22 
T. 
Tertiary rocks, correlation of 64-65 
occurrence and description of 41-44 
See also Lavas; Claron limestone. 
The Three Peaks, description of 16 
erosion near, views of 22 
location of 16 
parallel fractures in 19 
section near 38 
views at and of 16 
Topography, description of 14-15 
development of 22-23 
Page. 
Trachyte, early, analyses of 58-59 
correlation of 65 
description of 50-51 
Trachyte, later, description of 52-53 
Trachyte, latest, analyses of 58-59 
description of 53-55 
erosion of, view of 22 
Triassic rocks, absence of 17, 65 
U. 
Uinta formation, age of 64 
V. 
Van Hise, C. R., work of 93 
Veins, fissure. See Andesite, fissures in. 
Vogt, J. H. L. , on ore deposition 94 
Volcanic emanations, analysis of 81 
Volume, alteration in 34-35 
W. 
Ward, Freeman, work of 12-93 
War Eagle claim, map of Pocket. 
view of 70 
Washington, iron ores in 92 
Weathering, effect of 9, 79, 82-83 
Weed, W. H., on ore deposits 93-94 
o 
