XVI GEOLOGY AND MINING INDUSTRY OF LEADVILLE. 



CHAPTER V. 



Page. 



DESCRIPTIVE GEOLOGY OF LEADVILLE AXD VICINITY 202 



Geiieral struct nre 202 



Distribution of porphyry bodies 206 



White Porphyry 206 



Gray Porphyry 207 



Pyritiferous Porphyry Other porphyries 208 



Area east of Mowjnito fault 209 



Frontispiece 210 



Mosquito fault Minor faults 211 



West Sheridan Dyer Mountain 212 



Evans amphitheater 214 



East Ball Mounain 215 



Area between Mosquito and Ball Mountain faults 215 



Ball Mountain fault Prospect Mountain Ridge 215 



Little Ellen Hill Eruptive dikes 216 



Coal in Weber Shales Blue Limestone 217 



South slope of Ball Mountain 219 



Area between Ball Mountain and West on faults 219 



Weston fault 220 



Iowa fault Southwest slope of Ball Mountain 221 



Northwest slope of Ball Mountain 223 



Colorado Prince fault 224 



South Evans anticline 225 



Area between Weston and Mike faults 226 



Mike fault 226 



Pilot fault 227 



Union fault Long and Derry Ridge 228 



Long and Derry mines Dikes Iowa gulch 230 



Printer Boy Hill 231 



Head of California gulch Pyritiferons Porphyry 233 



North side of California gulch Printer Boy Porphyry 234 



Mike mine Breece Hill 235 



Breece fault 236 



Breece Iron mine 287 



Area north of Breece fault 237 



Syncline east of Yankee Hill 238 



Yankee Hill anticliue North slope of Yankee Hill 240 



South slope of Yankee hill 241 



Adelaide fault Southwest slope of Yankee Hill 243 



Moraines ^44 



Area between Mike and Iron-Dome faults 244 



Iron Dome fault 244 



Long and Derry Ridge Josephine Porphyry 



Lake beds Iowa gulch Dome Ridge 246 



South slope of Iron Hill 247 



North Iron Hill 248 



Area between Iron-Dome and Carbonate faults 248 



Carbonate fault 248 



South of California gulch Proof of synclinal fold 249 



Emmet fault Graham Park 250 



California gulch 252 



Carbonate Hill 253 



Little Stray Horse syncline 



Eastern rim 2o4 



Center of basin Western rim , 255 



