102 CONTRIBUTIONS TO ECONOMIC GEOLOGY, 1902. [bull. 213. 
of ore. No samples were, however, taken, and it is uncertain whether 
the altered granite does not contain a percentage of tin oxide. The 
most westerly working that could be surely identified as being upon 
the north vein is a pit 6 feet deep, which shows a 6-foot vein in wh ich 
the quartz is bluish in color and the tin ore is associated with much 
pyrite. This point is about 600 or more feet west of the first shaft; 
West of this point the ledge can not be traced across the slopes, but 
tin ore is seen on the slope 100 feet higher, and still farther north a 
good vein shows, carrying much pyrite, but devoid of any recogniz- 
able tin ore. 
The middle vein is developed by a shaft 50 feet deep, which shows 
a vein having a central leader of quartz 2 feet wide at the top and 
tapering to 1 foot 4 inches wide at the bottom of the shaft. The dip, 
as shown by the walls of the shaft, is 70° N. The central quartz 
mass is spoiled with cassiterite, and the altered granite on either side 
(•out a ins recognizable grains of tin oxide. 
The south vein lies 500 to 600 feet south of the middle vein. This 
vein is much narrower than the veins on the north, having an aver-i 
age width of about 1 foot. The strike, as shown near the shaft, is 
N. 50° W., and the dip 50° N. The vein walls are sometimes defined 
by a clay selvage one-sixteenth inch wide, but more often show a 
gradual fading off into the granite. 
It will be noticed from what has been said that the veins are all 
well defined at the surface and carry good values in tin ore, but that 
the ore apparently dies out in depth. Further development is needed 
to establish the existence of the ore at a greater depth than 50 feet, 
but it is believed that the veins have been thrown by local slips or | 
faults and will be found by crosscutting from the bottom of the pres- 
ent workings. The character of the fissures and the nature of the 
ore both indicate that 1 he veins are the result of deep-seated agencies, 
and are not merely segregations due to descending surface waters, j 
For this reason it is believed that further exploration will develop 
well-defined tin veins. 
