570 STRATIGRAPHICAL GEOLOGY. 



Belmont, dipping S. io° W., also W. and 12° N. 10° E. At the cross 

 roads, nearly to the west, the dip is S. 10° W. There is a white gneiss 

 running easterly at R. Rowe's, just in the edge of Gilford, to the south- 

 east of K. Hall's. The northern part of Belmont is universally covered 

 with ferruginous debris. Between J. Sawyer's and P. Folsom's is an 

 anticlinal with low dips. Near Sawyer's is a large ledge of gneiss. At 

 the north-east corner of Belmont, at the south end of the Belknap moun- 

 tains ridge, are ledges of ferruginous schist, dipping 10° N. 5° E., overlaid 

 by a hard gneiss, of texture like that of Concord granite, A few rods 

 to the east, in Gilmanton, the dip is 60° S. W., and the hill south seems 

 to be composed of the same material. At the north edge of the schists 

 next the sienite the indurated layers dip 80° N. 35° W. The line of Sec- 

 tion V runs through the south part of Belmont, and the rocks there are 

 probably of the newer age of mica schists. 



Diligent search has been made in vain for a range of white quartz, 

 similar to that of Hooksett, in Belmont, Gilford, and Laconia, Boulders 

 of large size are scattered over these towns. They seem to be most 

 abundant on the ridge two or three miles back from Laconia village, but 

 extend as far as to the modified drift close by the houses. None are found 

 on the north side of the river. Hence the conclusion is reached that 

 the source of the fragments must be beneath the alluvium of Winnipi- 

 seogee river in Laconia and Gilford. That gives us a range of quartz in 

 the Montalban, just as we had a relic of it in the Pemigewasset basin 

 in Holderness. 



The data for the delineation of these rocks in Sanbornton, Tilton, 

 Northfield, and East Franklin are unsatisfactory. Li the south-west part 

 of Franklin, half a mile back from the river, the dips are to the north- 

 west. Along the line next the Salisbury gneiss there is a hard quartzite, 

 with unsatisfactory dip. In Boscawen, at the north end of the village, are 

 rocks like Concord granite, with a north-west dip. The same occur near 

 Mrs. P. Arcy's, dipping 60° E. 



The Concord area. This extends from Barnstead to Dunbarton, and 

 is noted for the presence of the well known granite of our capital. The 

 Concord granite seems to form two contiguous oval bunches, very much 

 like the smaller ones along the Manchester range, mentioned heretofore, 

 and a little more than eight miles in length. The best known portion 



