48 NEW YORK STATE MUSEUM 



South of Blackbridge the throw nowhere appears to be more than 

 a few hundred feet. 



Fault just east of Wells. This fault bounds the Wells outlier 

 on the east. Its position is very clearly indicated by the topography, 

 the zones of crushed rock along the river south of Wells, and the 

 fact that the practically horizontal Cambric strata come so sharply 

 against the steep scarp of Precambric rock just east of Wells. Its 

 strike is north-northeast; length 6 miles; and downthrow side on 

 the west. Considering the thickness of Cambric strata and differ- 

 ences of altitude on either side of this fault just east of Wells, the 

 throw there must be no less than 570 feet. 



Fault through Wells. This is a minor fracture passing through 

 the village of Wells and over West hill. It is parallel to the larger 

 faults just described on either side of the valley. Its position is well 

 marked by the topography where it crosses West hill and less so 

 where it passes through Wells. One-half of a mile south of the 

 road summit on West hill there is a distinct crushed rock zone along 

 the fault. In a number of wells, 25 to 40 feet deep, in the northern 

 portion of the village and just west of the fault, no rock was struck, 

 while just east of the fault as there mapped the rock outcrops and 

 was also struck in pits just back of both Cochran's and Hosley's 

 hotels in the northern part of the village. 



The downthrow side of this fault is on the west and, as nearly 

 as can be determined by the structural relations of the Paleozoic 

 strata at Wells and the topographic influence on West hill, the 

 throw appears to be approximately 100 feet. 



Hope outlier faults 

 Colombe Brook-Cathead Mountain fault. This fault is clearly 

 traceable along Colombe brook and the eastern bases of Souther- 

 land, Groff and Cathead mountains. Its downthrow side is on the 

 east and the topographic influence is very pronounced. It bounds 

 the Paleozoic rock outlier near Hope on the west. Good fault- 

 breccias were noted in the beds of Colombe and Hatch brooks. 

 The most prominent scarp is just west of the outlier where it is 

 very steep and rises almost iioo feet above the river level. Con- 

 sidering the difference of altitude of 1060 feet between the summit 

 of Southerland mountain (1900 feet) and the river level (800 feet) 

 and the thickness of from 100 to 200 feet of Paleozoic strata at 

 the base of this mountain, we find that the total amount of displace- 

 ment is here no less than about 1200 feet. Northward the fault 



