STRUCTURAL DETAILS OF THE CONTACT 



151 



fault, with segregation of quartz along the fault in the sandstone. Forty 

 feet beyond this is an original irregularity due to two large concretion- 

 ary masses in the granite (figure 18), which is repeated on a smaller 



W. r 



+ +\+ + + t"^. V+ + 



J nc 



h = 5] 



M + + + +" 

 If eet. 



Figure 20.— Erosion Irref/ularity of the Contact. 

 Due to superposed spheroidal forms in the granite. 



scale 50 feet farther west (figure 19), and 15 feet from the west end of 

 this cliff one concretionary mass is clearly seen resting on another 

 (figure 20). 

 M. c N.E. S.W. 



I inch = 4f e el. 

 Figure 21. — Contact broken by a Gravity Fault. 



t inch = 3f eet. 

 Figure 22. — Contact broken by a Thrust Fault. 



Going north along the west side of the outlier we observe first three 

 small faults (figures 21, 22, and 23), the last one occupied by a veinlet 

 of quartz. Immediately beyond this, in the middle of the west side, the 

 contact is complicated b}^ two large, flat lenses of granite (figure 24), one 



