in the Cayuga Lake Region. 



243 



this reference a horizontal fault is to be inferred and judg- 

 ing from the small offset a displacement similar to the 

 fault at the big Falls from which this is but a half mile 

 distant in a direction nearly due east. 



Immediately east of the bridge crossing Salmon Cr. on 

 the road entering Ludlowville from the south is a fault of 

 most unusual appearance. The face of the bluff in which 

 it occurs trends N 73° E. that is, it faces in a general 

 northerly direction. Running from a point somewhere 

 under the bridge for over 100' to the east there is another 

 horizontal fault which ends abruptly against a joint plane. 

 This too is at low-water level but over 20' below the first 



Fig. 9. — Wedge-shaped block between a horizontal fault just above 

 water-level, and an oblique fault dipping toward the left margin of the 

 photograph. Easily detected by the offset of the joints. 



one mentioned. Just across the sluice to the east of the 

 bridge and 9' above the horizontal fault another fault 

 plane has been developed which dips down at an angle of 

 8° and meets the lower one just where it encounters the 

 joint plane. Cutting the face of this bluff are a number 

 of well-marked joints belonging to the N-S system. The 

 two faults form a wedge-shaped block between them, 

 which as seen in fig. 9 is thrust inward, that is to the east, 

 but exhibits no evidence of crushing at its point. The 



