Geology of the Comstock Lode and the Washoe District, with Atlas |
Common terms and phrases
600-foot level action amount andesites angles of extinction apatite appears augite augite-andesite basalt bisilicates black border black dike bodies bonanza brown calcite carbonic character chlorite cleavages color colorless COMSTOCK LODE considerable contains country rock crystalline crystals curve decomposed decomposition deposition depth diabase dichroitic diorite distance electromotive force epidote equation eruption evidence faulting feet feldspars fibrous fissure fluid inclusions foot wall Forman shaft formation Fortieth Parallel fresh friction geological glass inclusions Gold Hill grains granite granular diorite groundmass hanging wall heat hornblende kaolinization labradorite magnetite mass mica microlites microscope mineral mines Mount Davidson nearly observed occur oligoclase Ophir plagioclase Plate porphyritic porphyritic diorite portion position probably propylite pyrite quantity quartz quartz-porphyry Ravine secondary sheets shows silicates silver slide solfataric specimen structure surface Sutro Tunnel TABLE temperature tion triclinic twinning variety vein Virginia WASHOE DISTRICT west wall wholly Yellow Jacket