94 INDEX. 
Nevada: p age. 
Alum deposits 35 
Alunite occurrence 35-36, 67 
Borax deposits 33, 34, 42-43, 54 
Climatic records, precipitation, etc., tables 71-73 
Extinct craters found 19-20 
■Great Basin region, geoehemical conditions 1-14 
Gypsum deposits 65, 66 
Hardpans, occurrence and analysis 23 
Hot Springs, water analysis 18, 19, 35 
Nitrate deposits, location .- 32 
Salt deposits 7.17,40-41,42,43,53,54,56 
Soils, salines, nature, etc 25, 27, 78 
Waters, analyses 24, 77, 78 
Waters, surface and underground, analyses 24, 77, 78 
Nitrates, occurrence in Great Basin 32-33, 66 
Ogden River, note 29 
Oregon: 
Borates, deposits 33 
Climatic records, precipitation, etc., tables 71-73 
Great Basin region, geoehemical conditions. 1-14 
Lake basin descriptive notes 1, 4,30,31, 74 
Lake region, hot springs, water analysis 19 
Lakes, notes 9, 32 
Soils, saline, nature of 25, 79 
Southern, artesian area 13 
Osobb. (See Dixie Valley). 
Owens Lake: 
Descriptive notes 9, 29, 30, 32, 33, 49, 50, 51, 53, 65 
Salts content 64 
Owens River, descriptive notes 8,28, 29, 30, 31, 32, 81 
Owens Valley Basin, descriptive notes. 1, 3, 4, 7, 10, 11, 12, 19, 30, 31 
Panamint Basin, descriptive notes 1, 7, 39 
Paradise Valley, descriptive notes 1, 33 
Play a deposits: 
Description 36-37, 67 
Borax, description 33 
Playas, mud, and marshes, description, location, etc 39-60, 67 
Potash: 
Analyses, natural brines, Death Valley, Cal 47 
Bore explorations 2, 13, 18, 46, 54, 56-58, 63, 64 
Discovery, Columbus Marsh 54, 64 
Drill, Raikoad Valley, Nev., log 56-58 
Investigations, cooperative work. 2, 3 
Studies, Carson sink bore 2, 18, 63, 64 
Potash-bearing minerals, occurrence, Great Basin 65 
Potassium: 
Annual accumulation of Great Basin. . 32 
Content of deposits, Great Basin, notes, etc 44, 45, 49, 51, 53, 54, 59, 64, 66, 68 
Ratio to sodium, in waters and soils, Great Basin 24, 25, 27 
Precipitation, Great Basin region, notes and tables 3, 9, 10, 71, 72 
Pyramid Basin, descriptive notes 3, 10 
Pyramid Lake, descriptive notes 9, 29, 30, 53, 60, 61, 62, 63 
Quaternary lakes list, description, etc - 7-8, 67 
Quinn River, descriptive notes 4, 8, 9, 29 
Railroad Valley, location, formation, artesian waters, borings, etc 8, 13, 39, 56-59, 64, 83-85 
Rainfall: 
Annual, Great Basin region, notes and tables .... 3, 9, 10, 71, 72 
Distribution and run-off, Great Basin region 9-10 
Rains, torrential, occurrence in Great Basin, and effects 3-4, 21 
Ransome, citations : 65 
Reactions of solution in rock weathering 20-21 
Reade, T. Mellard, citation 31 
Reese River, descriptive notes 4, 8, 9, 29 
Reno, topographv 4, 5 
Rhodes Marsh, descriptive notes, analyses, etc 1, 33, 38, 39, 42-43 
River: 
Discharges, saline content 30-32, 81 
Waters, analyses, comparison with lake waters 27-30, 80 
Rivers draining into Great Basin region, descriptive notes 1, 4, 8, 9, 10, 27-30, 73-74, 75 
Rock weathering: 
Products, solubility 20-21, 66 
Zone, reactions 20-27 
Rocks: 
Formation, etc. , Great Basin region 4, 5, 6 
Great Basin region, extent, distribution, and character 13-14, 14-18, 65, 75,76 • 
Igneous, composition of acid and basic, discussion and tables 14-15, 76 
Igneous, decomposition, process and results ." 15-16 
Sedimentary, as source of salines, analyses, etc 17-18 
Rosamond Basin deposition, description 34 
Ross, W. H., citations 52 
Rowe, citation on gypsum beds, Great Basin 7 
Run-off, surface waters, Great Basin area 8-10, 73-74 
Rush Creek, notes 29 
Russell: 
Citations on geology of Great Basin 6, 13, 15, 18, 61, 65 
Monograph on Lake Lahonlan, citation 7 
