110 SOUTHWESTERN NEVADA AND EASTERN CALIFORNIA. 
carrying silica and metallic salts in solution appears to have depos- 
its! it- burden largely in preexisting cavities. Simultaneously 
waters wandering from the main channels silicified contiguous por- 
tions of the rhyolite. Kaolinization is presumably a later phenom- 
enon. Movement has occurred in the veins since silicificatioti, and 
they have been more or less faulted and brecciated. Surface waters 
have altered silver sulphides, pyrite, and probably less amounts of 
chalcopyrite to the corresponding chloride, oxides, and carbonates! 
while secondary sulphides have also been formed. Gold, probablj 
originally in pyrite, was simultaneously set free. 
Timber and water are abundant near the mines. Goldfield is 
about 50 miles distant by road. 
BLAKES CAM !\ 
Blakes Camp is located on one of the earlier rhyolite inliers which 
protrude from the ** wash " L2 miles northwesl of Silverbow. The 
prospect was discovered late in June. L905. A fault with well-del 
fined walls coursing X. 80 E. cuts the rhyolite, and in its immediate 
vicinity the country rock is silicified. Along this fault for a dis- 
tance of 600 feet a /one from is to 2 I inches wide is crushed to a line 
clay, in which are embedded slickensided fragments. The ground- 
up rhyolite is white or stained by hematite or limonite and to a less 
extent by manganese dioxide. This material is said to pan about $11 
per ton of free gold. Quartz veins in rhyolite north and east of 
Blakes Camp are said to carry both gold and silver. 
The mining camp of Eden is situated near the mouth of Little 
Mill Creek Canyon, on the east side of the Kawich Range. The lirst 
Locations were made February 20, L905, by John Adams. 
Three distinct vertical zones of mineralization cross Little Mill 
("reek from north-northeast to south-southwest, respectively, one- 
fourth, one-half, and five-eighths mile above the old mill at the roal 
forks. The country rock is rhyolite. which in many places is in- 
tensely silicified parallel to the mineralized zones. While the con- 
tact between the silicified and the unsilicified rhyolite is ;is a ride 
rather sharp, in some places there i- transition. The quartz and silici- 
fied rhyolite stand out in distinct walls, aptly called by the miners 
"dikes." which follow the mineralized zones. 
The central zone has been more developed than the others and was 
studied in more detail. This zone is situated along a line of faulting 
and brecciation and the rhyolite near the zone is mashed. The min- 
eralized zone varies from a vein of quartz 3 feet wide with a few rhyo- 
lite horses to a band of silicified rhyolite 8 feet wide, intensely netted 
by quartz stringer-. Parallel quartz veins more or less continuous 
