770 



INDEX. 



Page. 



Trachyte 88, 352, 362 



silver in 579, 594 



Triaasic limeatones, analysis of 598 



Trne iissure veins 375 



Twelve-mile amphitheater 172 



CREEK 171 



TysOD,S. T 626 



U. 



Uinta Range 290,291 



TTnexplored areas, ore prospects in 518 



Union fault 180,228 



UppeeCoal Measubjss 69 



limestone figured GO 



Upper Ten-mile Valley 197 



V. 



Valleys, classified 42 



Vanadinm 377 



Vein materials, analysis of 557, 599 



COMPOSITION OF 556 



onFryerHill 451 



VIRGINIUS MINE 477 



Vogel, A , cited 554 



Volcanic bocks in Mosquito Eange 39 



Volhard 593 



■w. 



\Valcott,C.D., cited 56 57,62 



■Warm Spring 169 



Pass 169 



Wasatch Eange 55,58,309 



Wash defined 41,72 



Watching the fubnace 667 



Water level in mines 378 



Waterloo MINE 440 



Waverly formation 55,56 



Webek G bits 68 



Shales 67 



Weight of blast in Leadville furnaces 740 



gases in Leadville furnaces 741 



Werner, A. G., cited 509 



Werner, Aug., cited 613,626,682 



Western slopes of Mosquito Range 175 



Weston- fault 170, 180, 181, 184, 220 



area between Ball Mt. fault and 219 



area between, and Mike fault 226 



Weston's Creek 176 



Wassox's Pass 173 



Wf-st Sheridan 212 



Wet Mountains, Archean areas in 24 



Whin Sill 297 



White Limestone 60,453 



analysis of 65, 214, 596 



POEPHYBY 76,324 



analysis of 326, 358, 589 



barium in 577, 591 



cross-cutting zone of 207, 402, 446, 495 



cutting Lincoln Porphyry 112,114 



distribution of, in Leadville region. 206 

 included iuSacramento Porphyry. 150 



in dikes 96, 97, 112, 114, 164, 



165, 178, 211, 324, 501 



leadiu 578,591 



main laccolite of 154 



onPryerHill 448 



Iron HUl 383 



silver in 579, 594 



typical development of 167 



White Ridge 153 



Whitfield, R. P., cited 66 



Whitney, J. D., cited 372,373,375 



Wild Cat mine 443 



Wilson, A. D viii 



Wilson, X.E 626 



WolfFritz 626 



Wood,A.B 11 



Wood, T. S 483 



T. 



Tankee Doodle mine 425 



Hill Anticline 1 .240, 260, 498 



North Slope of 240 



South SLOPEof 241 



Southwest slope of 243 



Syscline east of 238 



Younger eruptives 345 



Z. 



Zinc, in eruptive rocks 591 



ores 547, 618 



Zinkenite 527 



Zircon figured, Plate XXI 354 



in eruptive rocks ... 323, 327, 328, 329, 330, 333, 334, 335, 



336, 341, 340, 359 



Zirkel, F., cited viii, 347 



16 4 



