^2 NEW YORK STATE MUSEUM 



sheet; and into the Indian Lake quadrangle along the eastern bases 

 of Willis and Potash mountains — a distance of fully 15 miles. A 

 bold fault scarp, from 500 to iioo feet high, marks the position of 

 the fault. These figures also represent the minimum amount of dis- 

 placement. The greatest throw is along Piseco lake, and since the 

 downthrow side of this great fault is on the east we thus find a 

 ready explanation for the large generally depressed area including 

 Piseco lake and vicinity as well as the northwestern portion of the 

 Lake Pleasant quadrangle. 



Buck Pond Mountain faults ^ 



The fault on the western side of this mountain mass shows a 

 scarp which rises very abruptly to a height of a thousand feet and 

 is one of the finest examples of the kind within the quadrangle. 

 This fault is probably only a continuation of the Hamilton Lake 

 fault. 



Another fault separates Buck Pond mountain from Swart moun- 

 tain, the deep narrow trench having been worn out along the fault 

 line of weakness. One shear zone was noted. With reference to 

 the Swart mountain mass, Buck Pond mountain is on the down- 

 throw side. 



Whitehouse fault 



This important cross-fault bounds the great Speculator-Hamilton- 

 Swart mountain fault block on the south and strikes west-northwest 

 through Whitehouse and along the stream which heads near the 

 north base of Mud Lake mountain (Piseco Lake sheet). Shear 

 zones were noted along the stream one-half of a mile east of the 

 map limit and along the river one-fourth of a mile below White- 

 house. The greatest topographic effect is between Whitehouse and 

 Jimmy creek where, immediately north of the fault line, the steep 

 mountain rises 1600 feet. Not all of this, however, represents the 

 throw of the fault because the large river is here in its Preglacial 

 channel and hence must have verv* considerably deepened its channel 

 along the general line of fracture. This fault appears to end 

 abruptly against the Jimmy creek fault. 



Moose Creek fault 



One of the three most prominent cross-faults almost certainly 

 passes along Moose creek, through Mud lake, and along the upper 



^This is the high, steep mountain just northeast of Whitehouse. 



