390 STRATIGRAPHICAL GEOLOGY. 



the dip is about 75° easterly. In the west edge of Enfield village the dip 

 is 72° N. 72° E. The gneiss at the east end of the section has a dip a 

 few degrees less ; but there is no change of importance in the strike. 



The range of mica schists, on the western flank of Moose mountain 

 through Hanover, is comparatively narrow, but in Enfield it covers four 

 or five times as much width. There is a bed of magnetic pyrites, with 

 chalcopyrite, dipping 75° N. 40° W., on the water-shed between Mink 

 brook and the Mascomy, in the south-west corner of Hanover; and a bed 

 of the pyrites, said to have been mined once for iron, in the west part of 

 Enfield, near the lake, dipping northerly. The Shaker villages are situ- 

 ated mainly upon these schists. At the road turning off southerly from 

 them there is a ledge of hornblende, dipping 75° N. 75° E. A mile to 

 the south the mica schist dips 75° N., succeeded by the staurolite layers, 

 dipping N. 55° E. on top of the hill. I have never seen staurolite crys- 

 tals more abundant than in the neighborhood of West Enfield post-office. 

 The layers have an easterly dip. On the surface are large boulders of 

 siliceous limestone. On an old road to the Lily j^onds, now abandoned, 

 the mica schists appear, with some conglomeratic beds, dipping due east. 

 The ledges about here are greatly distorted. It is probable that these 

 Coos schists rest unconformably upon the gneiss. In the south-west 

 corner of Enfield the dips are about S. 70° E. After leaving Enfield, 

 these schists begin to narrow, and in Cornish and Claremont they are 

 not much broader than in Hanover. The north-west corner of Gran- 

 tham shows these rocks also. The westerly restriction of the mica 

 schists is caused by the presence of the same related rocks, interstrati- 

 fied with siliceous limestone, and described under another head farther 

 on. The correctness of the line of demarcation, as well as of the distinc- 

 tion, may be questioned ; but we cannot do better at the present state of 

 knowledge. The following arc the rocks and their dips from Lebanon 

 village up the valley of Great brook to Cranberry pond, by the east line 

 of Plainfield: Mica schists, 75° N. 23° W. for a mile; 50° N. 35° W. at 

 H. Wood's, on the road crossing the brook ; occasionally the same as far 

 as East Plainfield, the dip not changing till we reach T. Cutt's on the 

 Meriden road. It is mostly drift from East Plainfield to school-house 

 No. 14; west of which are two quartzite bands dipping 52° S. 54° E. By 

 H. L. Sleeper's the schists dip 48° S. 50° E. Staurolite is abundant 



