494 STRATIGRAPHICAL GEOLOGY. 



ledges ; they are everywhere pyritiferous, and in places they resemble 

 the White Mountain schists. South-east of Rindge, on the road by F. 

 Wilder's, there is only drift to Monomonac lake. North of the east arm 

 of the lake there is an outcrop of schist, but the rock here is mostly 

 an intrusive quartzose granite. South-east of J. R. Bixby's we have a 

 ferruginous schist, and also coarse granite veins ; at A. Griswold's 

 there is a coarse granite, and then drift south-east to the state line. 

 At East Rindge there are many outcrops of pyritiferous schist, and north 

 it can be seen near A. Giles's ; also at school-house No. 7, with granitic 

 veins. On the road to New Ipswich, at J. F. Hale's, there is a fine- 

 grained gneiss ; and a quarter of a mile east, south of the road, the strata 

 are twisted and contorted. At S. J. Hardison's, and east to the town 

 line, where the ferruginous schist appears, the dip is generally easterly, 

 though the inclination is quite variable. Along the road north of Hub- 

 bard pond, nearly to L. P. Towne's, the drift is sand. The outcrops of 

 rock on the road from Grassy pond to Rindge are ferruginous schist. 

 The north part of the town is mainly drift, but there is a ledge near F. 

 Gardner's. Between Rindge and the south-west corner of the town, the 

 rocks, although somewhat ferruginous, are closely allied in many of their 

 lithological characteristics to the White Mountain schists and gneisses. 



In Fitzwilliam, near Wm. F. Ferry's on the east, and at H. Fisher's 

 on the north-west, the rocks are decidedly pyritiferous ; — elsewhere in 

 the town we have andalusite and White Mountain schists, and porphyritic 

 gneisses. In Richmond, except in the north-west part of the town, we 

 have White Mountain schists and gneisses and pyritiferous schists ; 

 though here the two are hardly distinguishable from each other, and 

 are probably only a continuation of the White Mountain rocks of Troy. 

 They will be mentioned more specifically under the next head. 



FiBROLiTE Schists and Gneisses. 



This group of rocks consists of two bands. One is long and narrow ; it 

 extends from Landaff southward, and continues with some interruptions as 

 far as Keene ; — the other is found farther to the east, and its culminating 

 point is Mt. Monadnock ; from this it extends northward to Harrisville and 

 south-east nearly to the state line. The rock is somewhat variable, but in 

 Grafton county there is always a marked distinction between it and the 



