510 STRATIGRAPHICAL GEOLOGY. 



Farther east, just in the edge of Rumney and extending into Plymouth, 

 is Wolf hill ; this is almost one mass of granite. It is in many respects 

 unlike any of the other fine-grained granites, and seems to be metamor- 

 phic rather than intrusive. 



In Sunapee the granite is confined to a small area bordering on Suna- 

 pee lake, south of Sugar river, but there are several kinds of rock in the 

 immediate vicinity of this granite. Three quarters of a mile from the 

 outlet of the lake we have a typical variety of the White Mountain schists ; 

 between this and the lake there is porphyritic gneiss ; and with the gran- 

 ite at the quarry south-east of the Harbor there is a dark-colored gneiss 

 that belongs to the upper division of the Bethlehem gneiss. Then on 

 Keyser hill and towards the lake we find porphyritic gneiss again. When 

 this locahty was visited, the granite seemed to me to be intrusive, and, 

 from my study of similar rocks elsewhere, we have had no reason to 

 change our opinion. About a mile and three quarters south of the Har- 

 bor, and on a road running east and west, there is quite an extensive 

 quarry, and the stone obtained here is one of the best for many purposes 

 of any that is found in the state. It is fine-grained, the colors are bright, 

 and the rock does not have the dull appearance characteristic of some of 

 our granites. South-east of this last quarry, and near E. Woodward's, 

 there is a very dark-colored granite composed largely of quartz and mica, 

 which resembles very closely a granite associated with fine-grained granite 

 on the Nulhegan river in Vermont. A little south-east of this, on the 

 road nearest the lake, we find porphyritic gneiss. 



In Goshen the amount of granite is very small, and the area is on the 

 road in the east part of the town just north of Chandler brook. The 

 rock is rather coarse, and contains a much larger proportion of white 

 mica than most of our granites. There are no outcrops of other rocks in 

 the immediate vicinity, though to the south-east we soon come to porphy- 

 ritic gneiss, fibrolite, and ferruginous schists. 



In Acworth, in the south-west corner of the town and north of Cold 

 river, there is a very limited area of granite, and it is known as Osgood's 

 ledge. The surrounding rocks are quite unlike those associated with the 

 granites elsewhere. On the north and west we have quartzites and 

 schists of the Coos group, while on the south we have rocks that proba- 

 bly belong to the Montalban series. 



