UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



THE STRUCTURE AND GENESIS 



OF THE 



COMSTOCK LODE 



BY 



John A. Reid 



CONTENTS. PAGE 



Statement of the Problem 178 



East- West Faults 178 



Mexican Fault 179 



Bullion Eavine Fault 180 



Other Eavine Faults 180 



Cedar Eavine and Cedar Hill Canon 181 



Forks of Comstock Lode 182 



Fault in Andes Mine and Central Tunnel 183 



Bonanzas 183 



Virginia City 183 



Gold Hill 185 



Hale and Noreross Tunnel 186 



Deep Ores and Waters 187 



Analysis of Waters 189 



Assay of Waters 189 



Surface Ores and Waters 190 



Analysis of Waters 192 



Assay of Waters 192 



Eocks of Hale and Noreross Tunnel Section 193 



Conclusions 195 



Form of Lode 195 



Deposition of Ores 196 



Location of Bonanzas 197 



Structure and Genesis of Mt. Davidson 198 



