INDEX. 



1283 



Page. 

 Topaz, alterations and alteration products of. 318, 374, 393 



chemical and physical constants of.. 201,316 



occurrence of- -- -- 316 



Topography, character of, effect of, on ore de- 

 posits. 1217-1221 



Tourmaline, alterations and alteration products 



of — . 326-327,374,393,400 



chemical and physical constants of 201,326 



occurrence of .-- 326 



sources and modes of formation of 326, 380 



Transmission of water, capacity of rocks for, de- 

 terminable by capacity of imbibi- 

 tion 155 



Transportation of material, agency of water solu- 

 tions in 64 



Transvaal, depth of disintegration of rocks in. 531 



Travertine, deposits of , reference to 550 



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



calcium carbonate in salt water 119 



Tree-like system, ground-water circulation in 583,588 



Trees, disintegrating effects of , on rocks 445-447 



Tremolite, alterations and alteration products of . . 285, 

 2S6, 290, 374, 393, 397 



chemical and physical constants of 201,283 



formation of, from dolomite, chemical reaction 



involved in 822 



occurrence of 283-284 



sources and modes of formation of 241, 242, 



274, 277, 279, 283-284, 309, 354, 



372, 382, 383, 386, 407, 40S, 822 



Tridymite, chemical and physical constants of... 201,220 



occurrence and modifications of 220-221 



Trisilicic anorthites, chemical and physical con- 

 stants of 201 



Tropical lands, decomposition in 502 



Troughs,pitching,influence of ,on ore deposition. 1211-1216 

 Trunk channels of ground-water circulation, atti- 

 tudes of 1202 



size and continuity of, variations in 1201 



Tschercnak, Gustav, on enorphite and berlanite 347 



on olivine 30S 



Tufa, formation of 550,553,793 



Tuffs, cementation of 1025 



character of 596-597 



consolidation of 597 



gneissic, discrimination of 909 



schistose, discrimination of 909 



TJ. 



Unaka Mountains, -ariable metamorphism in 920 



Underground circulation, variation in size and con- 

 tinuity of channels for 1201 



See also Ground water. 



Uplift and subsidence, influence of, on ground- water 



level 426 



Urea, transformation of, to ammonia, formula for 



reaction producing 465 



Uvarovite, chemical composition of, and other data 



concerning. : 201,299 



occurrence of 302 



Van Hise, C. E., on alteration of clastic rocks _ 184 



on belt of cementation, depth of _ 657 



on cementing material, similarity of, to rock 



cemented 628 



Page. 

 Van Hise, C. E., on chlorine, emission of, during 



volcanic eruptions 789 



on cleavage 778 



on closure of rock openings at depths 566 



on crustal shortening 774 



on deformation of rocks placed in unusual posi- 

 tions --. 188 



on earth movements Ill, 146, 774, 924, 926, 927 



on enlargement of mineral fragments 625, 626, 644 



on granulation and recrystallization, influence 



of rock character on... 740 



on igneous intrusion, periods of, coincidence of, 

 with periods of rapid orogenic move- 

 ments 709 



on igneous intrusions, agency of, in producing 



iron-silicate rocks 840 



on gravity, domination of, in earth movements. 46 

 on iron-ore deposits of the Lake Superior re- 

 gion 831,1194,1216,1219 



on ore deposition __ _ 1031,1208 



on ore deposits, secondary enrichment of . _ 1188 



on liquid inclusions, secondary character of 746 



on magnetite deposits of Michigan 624 



on mashing of rocks 762-764 



on metals, source of 1030 



on metamorphism, variations in, within short 



distances _ 919 



on miscibihty of rock and water.. 723,1030 



on movements of earth's crust 924,926,927 



on pegmatization 725 



on peripheral structure _ ._ 716,717 



on porphyritic crystals in schists 702 



on quartz grains (flat) in rocks 692 



on recrystallization of quartz and development 



of mica in rocks 694 



on residual cores of recrystallized quartz grains 



of rocks 752 



on replacement of quartz by iron oxide 220 



on rock alteration in intermediate belt between 

 zone of katamorphism and zone of 



anamorphism. _ 768 



on rock cleavage 760 



on rock flowage __ 743 



on schists of Lake Superior region 904 



on schist-conglomerates. 860 



on secondary enrichment of ore deposits 1188 



on strain and fracture of rocks 600 



on strain in minerals, effect of 97 



on zones of fracture and flowage, subdivision of 



outer part of earth into 187 



Van Hise, C. E., and Irving, E. D., on actinolite, 

 growth or penetration of, into 



quartz.. _ 219 



on alteration of clastic /ocks J._ 184 



on diabase from Michigan, losses in, due to 



weathering _. 514 



on enlargement of mineral particles 644, 874 



on igneous intrusions, agency of, in producing 



iron-silicate rocks _ 840 



on iron-ore deposits, origin of 831 



on recementation of rocks 564 



on crystallization of quartz and development of 



mica in rocks _ 694 



on rock textures ( original) , preservation of , after 



metasomatic alteartion 644 



on schists of the Lake Superior region 904 



