770 



INDEX. 



Page. 



Trachyte 88,352,362 | 



silver in : 579,594 



Triasaic limestones, analysis of 598 



True fissure reins 375 



TWELVE-MILE AMPHITHEATER 172 



CREEK 171 



Tyson, S. T 626 



U. 



Uinta Range 290,291 



Unexplored areas, ore prospects in 518 



Union fault 180,228 



UPPER COAL MEASURES 69 



limestone figured CO 



UPPER TEN-MILE VALLEY 197 



V. 



VALLEYS, classified 42 



Vanadium 377 



Vein materials, analysis of 557,599 



COMPOSITION OF 556 



onFryerHill 451 



VlROINIUS MINE 477 



Vogel.A, cited 554 



VOLCANIC HOCKB in Mosquito Range 89 



Volhard 593 



W. 



Wai cott.C.D., cited 56 57,62 



Warm Spring 169 



Pass 169 



Wasatch Range 55,58.309 



Wash defined 41,72 



WATCHING THE FURNACE 667 



Water level in mines 378 



WATERLOO MINE 440 



Waverly formation 55,56 



WEBER GRITS 68 



SHALES 87 



WEIGHT OF BLAST in Leadville furnaces 740 



gases in Leadville furnaces 741 



Werner, A. G., cited 669 



Werner, Aug., cited 613,626.682 



WESTERN SLOPES of Mosquito Range 175 



WESTOX FAULT 176,180,181,184,220 



area between Ball Mt. fault and 219 



area between, and Mike fault 226 



Weston's Creek 176 



WASSOX'SPABS 



WKST SHEBIDAN 



Wet Mountains, Archean areas in , 

 Whin Sill ... 



Page. 



173 



212 



24 



297 



WHITE LIMESTONE 60,453 



analysis of 65,214,596 



PORPHYRY 76,324 



analysis of 326,358,589 



barium in 677,591 



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



cutting Lincoln Porphyry 112,114 



distribution of, in Leadville region . 206 

 included in Sacramento Porphyry . 150 



in dikes 90, 97, 112, 114, 164, 



165, 178, 211, 324, 501 



lead in 578,591 



main laccolite of 154 



on Fryer Hill 448 



Iron Hill 383 



silver in 579,594 



typical development of 167 



WHITE RIDGE &** I 53 



WUitnt-ld, RP., cited rt*. 56 



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



WILD CAT MINE 443 



Wllnou, A. D viii 



Wilson, N. R 626 



Wolf, Fritz 626 



Wood, A. B 11 



Wood, T. S 483 



Y. 



YAXKEE DOODLE MINE 425 



HILL ANTICLINE 240, 260, 498 



NUIITII SLOPE of 240 



SOUTH SLOPEof 241 



SOUTHWEST SLOPE of 243 



SYKCLIXE E ABT of 238 



YOUNGEIl IHUPTIVES 345 



Z. 



Zim-, in eruptive rocks 591 



ores 547,618 



Zinkenite 527 



Zircon figured, Plate XXI 334 



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



336, 341, 346, 359 

 Zirkel, F., cited viii, 347 



