GEOLOGY OF THE LAKE DISTRICT. 599 



converging. Those in Wakefield and Wolfeborough are three, and these 

 near Province pond but one mile apart. Those who come after us may- 

 find the extension of these bands in Maine, Effingham being the border 

 town of our state. 



The limestone of Wakefield deserves a further notice. It is a siliceous 

 rock of peculiar appearance, from the presence of a green mineral, per- 

 haps pyroxene. Its stratigraphical place being known, great interest will 

 be attached to other localities where the associations are somewhat dif- 

 ferent. In Brookfield, near the "corner," are large quadrangular blocks 

 of this rock, looking as if they had not travelled a hundred feet from 

 their source. There is a siliceous rock resembling this in color, dipping 

 60° W., at A. Berry's, west of Cook's pond. A related ledge at J. Per- 

 kins's, a mile east of the corner, dips 40° N.; a mile south-west from the 

 village of West Newfield, Me., small boulders of this rock are very nu- 

 merous. There is a limestone bed at the Davis mine, on the east side of 

 Balch pond in this town, which is of this material. In Acton it is quite 

 characteristic, dipping 5° S. W. a mile west of the south end of Manson 

 pond, and is associated with gneiss. Near school-house No. 10 of Milton 

 the blocks are sufficiently numerous to inspire a belief in the existence 

 of a ledge near by. I think the limestone beds described by Jackson in 

 York and Oxford counties, Me., may be of this same variety; and further 

 study may eliminate interesting facts concerning their stratigraphical dis- 

 tribution. 



There is a peculiar granitic rock occupying a portion of the east rim 

 of the Winnipiseogee basin. Batson and Trask hills, and Whiteface 

 and Cotton mountains, along the east line of Wolfeborough, are com- 

 posed of it ; and on the continuation of the ridge near J. Jenness's in the 

 same town, at the church on the high land east of Cotton Valley station, 

 and on the hill north of Cook's pond in Brookfield, similar rocks occur. 

 It curves from a south-east course, and runs southerly towards Cropple 

 Crown. I have esteemed the material as gneiss, and have not distin- 

 guished it upon the map separately from the Lake group. I have not 

 been able to find marks of stratification in it, though diligent search has 

 not been made for them. The occurrence of this rock along a line of 

 hills suggests a possible connection with the Mt. Bet series of granites 

 in New Durham. The east sides of Whiteface and Cotton mountains are 

 precipitous. 



