MINES OF GOLD HILL. 
305 
and becomes longer on successively lower levels, reaching a maximum length of 
about 600 feet on level 9 of the Midget and level 5 of the Conundrum. Below this 
only a few isolated bodies of pay ore have as yet been found. The pitch of the 
southern edge of the ore body is practically 90° and of the northern edge about 45° 
to the north. 
The ore of the Conundrum lode is confined to the “basalt” dike, which is 
usually from 18 inches to 3 feet in width. The dike is traversed by numerous 
little fissures, usually parallel to the walls, but sometimes of irregular trends. 
These range in width from an eighth of an inch to those visible only with a strong 
lens or microscope. The calaverite occurs chiefly in the quartz and fluorite veinlets 
filling these fissures, but probably to some extent throughout the mass of the rock, 
which is altered to a gray porous material containing pyrite in minute crystals 
implanted on the walls of the little cavities and disseminated through the rock. 
In the northern part of the Conundrum mine, in the Mary Ann claim, is an 
important pay shoot in gneiss which has been stoped from level 6 nearly to level 
5, and has been explored by a winze below level 6. The ore occurs in a zone of 
east-west Assuring, just east of the basalt dike. On an intermediate level, 50 feet 
above level 6, this pay shoot was about 70 feet in length and on level 6 about 25 
feet in length. On both these levels the ore was found to be limited on the west 
by the basalt dike and on the east by a phonolite dike striking northeast and dipping 
northwest about 75°. Below level 6 the ore, as followed in the winze, is said to go 
through the phonolite dike and continue into the gneiss on its under side. Although 
the ore body has a general east-west trend it is not a distinct lode, but consists 
of a number of small intersecting fissures of various dips and strikes and has no 
definite walls. The ore occurs in the fissures as calaverite in a quartz and fluorite 
gangue. It is unoxidized. 
O o 
UNDERGROUND "WATER. 
The Moon-Anchor shaft, the first of the three to reach any considerable depth, 
originally encountered water, in April, 1899, 376 feet below the collar, or 9,489 
feet above sea level. The flow was about 400 gallons per minute. The maximum 
flow, however, 1,100 gallons per minute, was found near level 6, or 9,241 feet above 
sea level. This water slowly receded and in January, 1903, the sump, 9,030 feet 
above sea level, was dn r . Early in 1904 water was again encountered 870 feet 
below the collar of the shaft, or 8,994.7 feet above sea level, but this soon disap¬ 
peared, allowing sinking to be resumed without pumping. The water record of 
the Midget shaft presents no additional features of interest, and the Conundrum, 
keeping above the water level, has always been dry. 
E. PORTER GOLD KING MINE. 
The E. Porter Gold King mine is situated a few hundred feet south of the 
summit of Gold Hill. Its production is estimated at $50,000. The underground 
development consists of a shaft about 500 feet deep and four levels representing 
1,500 feet of drifting. An incline called the Jaycox shaft extends from the surface 
to level 1. The entire workings are in breccia. A “basalt” dike with a practi- 
callv north-south course is shown by surface pits and is cut on level 4. 
