coos AND ESSEX DISTRICT. 49 



well as on the adjacent shore. On the farm north of the lake, formerly 

 owned by E. Day, ledges of this rock are very prominent, and it contains 

 numerous nodular masses of epidote, and, not unfrequently, there is lime 

 associated with the epidote. North of Second lake there is a considera- 

 ble area occupied by it. 



The whetstone grit in the south is first seen north-west of Bear rock, 

 near T. Paul's. Although the cleavage of this rock is not such that it 

 can be easily wrought for scythe-stones, yet, on account of its excellent 

 grit, farmers sometimes get them here, as also in the vicinity of Connec- 

 ticut lake. Along the line of the diorite the whetstone grit frequently 

 outcrops. In Clarksville it is a common rock in the woods east of the 

 settlements. In Pittsburg, on the farm formerly owned by J. P. Quimby, 

 this schist is interstratified with the hornblende rock ; and in the forests 

 south-east of J. T. Amy's there are several ridges where this is the un- 

 derlying rock, and some of the outcrops present a surface of twenty or 

 thirty feet, nearly perpendicular. West of Connecticut lake, for a mile, 

 there are several places where there are ledges. Often the drift striae 

 are remarkably distinct, and many can be seen in the vicinity of the out- 

 let of the lake. Northward, this rock appears in outcrops all the way 

 to the boundary. There are prominent ledges of it on the west shore of 

 Third lake, where it appears massive enough for grindstones, while north- 

 ward, on the boundary, the cleavage is such that whetstones could be 

 easily wrought. 



All the rocks which we have described as embraced in this belt have 

 their strata at a very high angle, but sometimes they dip towards the 

 east, and, again, they dip westerly. The high angle at which they dip, 

 the disturbed strata, and the character of the rock indicate that they are 

 older than the rocks on the west ; — but this will be more fully discussed 

 elsewhere. East of the band of rocks just described there is a large area 

 in which are found hydro-mica schists, serpentine, diorite, quartzites, and 

 indurated schists. These rocks are not confined to New Hampshire, but 

 they extend northward, and constitute the metamorphic Quebec group of 

 the Canadian geological survey. At the extreme north-east corner of 

 the state, at Crown monument, we find a fine-grained mica schist. Two 

 miles south-west of Crown monument there is a band of serpentine, a 

 rock exceedingly rare in New Hampshire, but which is here found in the 

 VOL, II, 7 



