1276 



INDEX. 



Page. 



Quartz, corundum, and potassium carbonate, altera- 

 tions and alteration products of. . . 381, 408 



Quartz, diaspore, and calcite, alterations and altera- 

 tion products of 382,407 



Quartz, diaspore, and potassium carbonate, altera- 

 tions and alteration products of... 382,407 



Quartz-feldspar sand, deposits of 870-874 



Quartz-feldspar sand family of rocks, deposits com- 

 posing 870-876 



Quartz, gibbsite,and calcite, alterations and altera- 

 tion products of 383,407 



Quartz, gibbsite, and potassium carbonate, altera- 

 tions and alteration products of. . . 383, 407 



Quartz, porphyry, mashed, thin section of, show- 

 ing elongated quartzes 704 



Quartz rocks, deposition of 847-853 



Quartz-sand rocks, deposits forming 860-870 



Quartz-schist, view of thin section of, showing liquid 



and gas filled cavities 620 



Quar tzite, character and origin of 865-868 



photomicrograph of _ . .- 872 



Quartzite-schist, character and origin of 868-870 



Quincke, M., on molecular attraction between water 



and walls of its container 143-144 



Rainfall, amount of, in different sections 413-414 



cycles of, influence of, on ground-water level... 424 

 seasons of, influence of, on ground-water level . 424 



Rain water, carbon dioxide in, amount of. _ _ _ 474 



Ransome, F. L., figure cited from 1135 



on ore deposits of the Enterprise mine, Rico, 



Colo... 1084,1208,1215,1229 



on ore deposits of the San Juan district, Colo- 

 rado 1187,1227,1229 



on rhodochrosite, occurrences of, in connection 



with gold 1116 



on secondary enrichment of ore deposits 1188 



Raoult, F. M., on lowering of freezing point of 

 liquids by addition of material for 



dissolution __. 115 



Raymond, R. W., on genesis of ore deposits... 1160 



Reactions, chemical, discussion of. _ 87-90 



compounds present in, consideration of 91-94 



effect of pressure on 100-104,168 



importance of, in metamorphism.. 88-89 



of expansion, discussion of. __ _ _ 631-634 



nature and speed of _. 91-113,107-108 



phenomena of 87-90 



reversibility of 87-90,110-111,366-369 



speed and nature of 91-113 



speed of, increase in, with increase of tempera- 

 ture 107-108 



stoppage of, by pressure and heat generated by 



the reactions themselves 89 



See also Chemical reactions. 

 Reade, T. Mellard, mountain-making theory of, as 

 affected by theory of increase of den- 

 sity of minerals with depth _ _ _ 185 



on limestone contained in earth's crust, thick- 

 ness or mass of. 941 



on mountain ranges, origin of 924 



on salts abstracted from soil by solution , amount 

 of 



on sedimentary rocks, thickness of 939 



Recrystallization of minerals in rocks, alterations 



effected by 202 



Page. 



Recrystallization, diagram illustrating 752 



discussion of _ 705-706 



energy factors in 771-772 



facts concerning 



lag of, behind deformation. 



processes of .__ 751-759> 



relation of granulation to 737-748 



temperatures favorable to 740' 



theory of 



time, relation of, to deformation 



time required for 750-751 



under mass-mechanical action 



under mass-static conditions 



water content of rocks as effecting. 741-748 



Recrystallization of quartz, phenomena of 218 



Recrystallization and condensation, with mineral 



changes, features of 102-104 



Renard, A. F., on submarine formation of phil- 



lipsite 333 



Renard, A. F., and Murray, John, on silica in sea 



water 866-86T 



on source of silica for marine organisms 848 



Replacement of wall rock by ores, examples of . 1203-1207 

 Reprecipitation of material in belt of weathering, 



discussion of 539-554 



Residuary deposits, burial of, under marine deposit*, 



example of . 559- 



reference to 559 



Reuter, M., and Treadwell, F. P., on solubility of 



calcium carbonate in salt water 119 



Reversibility of chemical reactions, observations 



on 87-90,110-111,366-369 



Reyer, E., on origin of pegmatites 722 



Rhodochrosite, occurrence of, in connection with 



ore deposits, significance of _ 1115-1116 



Rhodonite, occurrence of 1131 



occurrence of, in connection with ore deposits, 



significance of _ 1115-1116- 



Rhombic pyroxenes, character, occurrence, forma- 

 tion, and alterations of 267-271 



Rickard, T. A., on indicator veins of Bendigo reef, 



Australia 1111 



on lodes of the Cripple Creek district 1225- 



on ores of the Bendigo gold district, Australia.. 1212, 



1213 



on ores of the Enterprise mine, Rico, Colo 1084, 



1208, 1215 

 on precipitation of gold by organic matter. . 1094, 109S 



on precipitation of gold by tellurides 1097 



on telluride ores of Kalgoorlie 1122 



on water in veins 1063 



Rico, Colo., ore bodies at Enterprise mine at 1084, 



1208, 1215 

 Riebeckite, chemical and physical constants of. . . 200, 283 



occurrence of 285- 



Rock-making minerals, chemical formulas for . . . 195-201 



consideration of 207-358 



list of, showing chemical formula, specific 



gravity, etc 195-201 



molecular volumes of 195-201 



molecular weights of 195-201 



specific gravities of, logarithms of _ 195-201 



Rock-salt family of rocks, features of deposits com- 

 posing.. 789-790 



Rocks, alteration of , geologic factors affecting 40-44 



alterations of, general nature of 31-38 



analyses of 934-938- 



