420 STRATIGRAPHICAL GEOLOGY. 



apparently two bands of quartzite, though they may be connected at the 

 north end of the mountain. Ascending the mountain from the east, we 

 do not find the hornblende schist that usually succeeds the protogene 

 gneiss ; but the quartzite rests on the gneiss, and has a westerly dip of 

 from 15° to 20°. It contains what seems to be flattened pebbles. Rest- 

 ing on the quartzite we find a folded and contorted mica schist, which 

 sometimes carries andalusite. The quartzite bends around as we go tow- 

 ards the north end of the mountain. It has a southerly dip, and is prob- 

 ably connected with the second band of quartzite that we find when we 

 go directly west across the mountain. This second band has a slight 

 dip to the east, thus giving to the quartzite a synclinal structure. The 

 quartzite rests on the protogene gneiss ; and the contorted mica schist 

 is included in the quartzite. The two bands of quartzite near the south 

 line of Keene are perhaps a mile apart. The westerly band of quartzite 

 contains graphite, and there is quite a large opening where it was for- 

 merly worked. The mica schist near the graphite contains some very 

 pure quartz veins. On the north-east side of the mountain, west of 

 White's, the quartz found in the gneiss was at one time used in the 

 manufacture of glass. 



Dip of the Quartzite, Quartz Schist, and Quartz Conglomerate. 



Landaff. Piermont. 



40 rods south-west of O. Brownson's, S. 2° At south end of Piermont mountain, N. 



E. 20°. 22° W. 40°. 



h mile south of J. Clough's, N. 68° W. 15°. Dorchester. 



North of D. N. Page's, N. 50° W. 15°, Between McCutchins's and top of Smart's 

 k mile west of Page's, N. 70° W. 20°. mountain, N. 82° E. 50°., 



Near Mrs. Grant's, N. 10° E. 40°. Enfield. 



Benton. At Lily pond, N. 80° E. 60°. 



At D. Howe's, N. 72° W. 40°. At D. L. Smith's, S. 65° E. 48°. 

 On ridge south of D. Howe's, about half Granthatn. 



way up, N. 68° W. 50°. South-west of Sugar Loaf hill, S. 45° E. 

 At top of ridge, N. 48° W. 65°. 80°. 



On summit of Black mountain, N. 5° W. At L. M. Bean's, N. 34° W. 85°. 



70°. Opposite Mrs. Chase's, vertical. 

 At saw-mill north, N. 15° W. 40°. Plainfield. 



At west end of Sugar Loaf mountain, N. At W. L. Martin's, S. 64° E. 52°. 



10° E. 50°. 



