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NEW YORK STATE MUSEUM 



clined at low angles downward toward the next exposure of the 

 Precambric, whereas if they were restmg upon the latter in a depo- 

 sitional relation, they ought to slope upward to them. If, however, 

 dropped by faulting, they would readily assume the relations ob- 

 served. 



Faults in the Precambric rocks. Faults are sometimes shown 

 by the brecciated condition of the ancient crystallines. Figure 12 

 is a sketch to scale of an exposure of anorthosite south of the road, 

 arid near the Woolen mill, a mile or less west of Elizabethtown, 

 where the exposures shown in figure 7, page 41, were mapped. The 

 star upon this last named figure shows the exact spot. The 



^Jl'-'. 



Woolen Mill i mile west of Elizabethtown. 



Fig. 12 Faulted and crushed anorthosite near Woolen Mill i mile west of Eli: 

 The exact locality is shown by a star in the lower part of figure 7 



anorthosite has been crushed to a blocky breccia whose larger pieces 

 are embedded in a sheared and schistose matrix derived from the 

 comminuted particles. Besides the general crush, it would appear 

 as if the upper portion of the diagram had been moved northwest 



