226 



drainage lines are affected. In the faulted area the ground waters 

 which have found their way through the limestone have a tendency to 

 follow the eastward sloping surface of the Knobstone to the rift, and 

 near this point often come to the surface in a stream valley which lies 

 near the rift and generally parallel with it. This tendency of the 

 underground streams is modified by local dips of the strata north or 

 south. 



The surface streams, especially those along the line of the fault 

 plane, have been influenced by the displacement. They have worked off 

 the harder limestones on to the Knobstone in many places. These fol- 

 low the line of rift until a local north or south dip has caused them to 

 change the direction of their course. Small tributaries of the larger 

 cross-cutting streams have developed, as has been noted again and 

 again, along the line of rift. 



