INDEX. 



1259 



Page. 



Freezing and thawing, effect of, on rocks 440-444 



Fuller, M. L., and Crosby, W. O., on origin of peg- 

 matites 722,723 



Fumaroles, alums produced by I 493 



chlorides produced by 493 



gases emitted by, sources of - 491-492 



metamorphic work of 490-494 



products of ._ 493-494 



Furlonge, W. H., on depth of decomposition of rocks 



in the Transvaal 531 



Fusion and absorption of intruded rocks, discussion 



of 728-736 



Futterer, Karl, figure cited from 704 



on new minerals formed in rocks 753 



on quartz grains (flat) in rocks 692 



on recrystalization of quartz in quartz-porphyry 738 



G-. 



Gabbro, mineral composition of, and volume changes 



possible in 632-633 



Galena, occurrence and genesis of 1148-1151 



secondary, figure showing .1156 



Galena limestone, strain in, shown by quarrying... 598 

 Gangue minerals of aqueous solution ores, enumer- 

 ation of 1233 



Gangue minerals of ore deposits, citations concern- 

 ing 1055-1057 



Gannett, Henry, on range of temperature in Alaska. 437 

 Gardner, F. D., and Means, T. H., on effect of alka- 

 lies in soils 478,543 



Gardner, F. D.,and Stewart, John, on calcium chlo- 

 ride and sodium carbonate in soil at 



Great Salt Lake 542,543 



Garnet, absorption of other minerals in rocks by .. 701 

 alterations and alteration products of. 302-307, 373, 383 



chemical and physical constants of 197, 299 



occurrence of .'. 300-302,1057 



sources and mode of formation of 300-301, 



353,370,380,393,903 



Gas, water, in zoneof anamorphism, action of 660-661 



Gas content of rocks, effect of, on metamorphism.. 41 



Gaseous solutions, circulation of 1018-1021 



formation of 59 



metamorphismby. 59-63,490-194,648-649 



ores produced by 1052-1058 



work of, in belt of cementation 648-649 



Gaseous and aqueous solutions, precipitation by re- 

 actions between __ 119 



Gases, chemical and physical principles applicable 



to action of... 60-62 



important in rock alteration, list of 59 



inclusions of, in rocks, figure showing 620 



metamorphic work of 59,61,62-63 



mixtures of, properties of 60 



precipitation between aqueous solutions and ... 119 

 pressure of, importance of, in metamorphism.. 61-70 

 quantity of, dissolved by liquid, proportional to 



pressure 70 



solubility of, as affected by temperature 72 



solution of, in ground waters. 68-72 



temperature of, importance of, in metamor- 

 phism 61-62 



Gedrite, chemical and physical constants of 197,281 



occurrence of -• 281-282 



sources and mode of formation of 282 



Gehlenite, alterations and alteration products of ..J 314, 



373,383,406 



Page. 



Gehlenite, chemical and physical constants of 197,314 



occurrence of __ 314 



Gehlenite and quartz, alterations and alteration 



products of. 383,406 



Geikie, Archibald, on dolomitezation of Carbonifer- 

 ous limestones in England 800 



on graywackes of Great Britain 882 



on hydrogen of volcanoes, source of 492 



on lavas, temperatures of _ 652 



term schist defined by 779,780 



Geographic conditions, effect of, on metamorphism. 41 

 Geological factors affecting alteration of rocks, 



enumeration of. 40-44 



Geological work of ground water, factors influenc- 

 ing :.. 156-158 



Geology, data composing great volume of 31-32 



Georgia, depth of decomposition of rocks in 530 



granites from, losses in, by weathering. 523 



Geyserite, deposits of, reference to 550 



Gibbsite, alterations and alteration products of 235- 



236,373,383,400 



chemical and physical constants of 197, 198, 234 



occurrence of 235 



sources and modes of formation of. 223, 



224-225, 235-236, 254, 255, 256, 258, 260, 261, 263, 264, 

 265, 292, 293, 294, 296, 298, 299, 304, 312, 313, 318, 319, 

 322,323, 328, 337, 338, 339, 341, 343, 353, 370, 375, 376, 

 377, 378, 379, 380, 381, 382, 384, 386, 387, 388, 389, 390, 

 392, 393, 394, 397, 398, 399, 400, 402, 403, 404, 406, 624 

 Gibbsite and albite, alterations and alteration prod- 

 ucts of 375,400 



Gibbsite and anorthoclase, alterations and altera- 

 tion products of 377,400,401 



Gibbsite and magnesite, alterations and alteration 



products of.. 383,401 



Gibbsite and microcline, alterations and alteration 



products of 389,400 



Gibbsite and orthoclase, alterations and alteration 



products of __ _ 389,400 



Gibbsite and quartz, alterations and alteration 



products of.. 383,407 



Gibbsite, magnesite, microcline, and siderite, alter- 

 ations and alteration products of.. 389,401 

 Gibbsite, magnesite, orthoclase, and siderite, alter- 

 ations and alteration products of 389 



Gibbsite, quartz, and calcite, alterations and altera- 

 tion products of 383,407 



Gibbsite, quartz, and potassium carbonate, altera- 

 tions and alteration products of . . . 383, 407 

 Gibbsite. See also Hy drargillite 



Gismondite, alterations of _ 335,367 



chemical and physical constants of 197,231 



occurrence of. J 331-333 



sources and modes of formation of 262, 



332,367,370,376,402,633 

 Gilbert, G. K., on climatic changes in the Far "West 



in Pleistocene time 1178 



on contact metamorphism 651 



on deposits of Lake Lahontan 554 



on exfoliation of rocks in Sierra Nevada (note) _ 438 



on magnesium in salts of Great Salt Lake 994 



on post Glacial anticlinal arches in shale and 



limestone 598 



on potassium in the Dead Sea ;_ 1000 



on shore deposits _ 795 



on warm or hot springs of Cordilleran region. 591-592 

 Glaciers, disintegrating work of 498 



