J. F. Kemp — The Storm King Crossing 



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course. In places the joints are 

 more closely spaced than usual 

 hut nowhere to such a degree as 

 to weaken the rock, more than 

 is inevitable in large masses. 



In the eastern half of the tun- 

 nel and respectively between 

 Stations 936-937, and 937-938, 

 two small faults have been en- 

 countered which are the chief 

 and indeed almost the only source 

 of water. The eastern one is 

 the largest. It strikes about N. 

 30 W., almost exactly at right 

 angles with the tunnel. It dips 

 65 W. There is no means of 

 determining positively whether 

 it is a normal fault or not, but 

 it presumably is normal. The 

 granite is crushed over a width 

 of 2-3 ft. and is somewhat red- 

 dened by the oxidation of the 

 iron-bearing minerals. There are 

 slick en sides coated with second- 

 ary silica. This fault is the most 

 prolific single source of water in 

 the tunnel, but the amount is 

 nevertheless comparatively 

 small. Its quantity and quality 

 will be later referred to. If the 

 fault is projected upward, it 

 emerges in Breakneck Moun- 

 tain, well inshore from the riv- 

 er's bank. 



The second fault was encoun- 

 tered about one hundred feet 

 west of the first and is much 

 smaller. It strikes X. 45 "W. 

 and dips 45 W. There is only a 

 foot or less of crushed granite 

 but the slickensides are again 

 developed and are coated with 

 silica. A smaller amount of 

 water is afforded. If this fault 

 is also projected to the surface, 

 it comes out in Breakneck Moun- 

 tain. It is evident, therefore, 



