484 STRATIGRAPHICAL GEOLOGY. 



there is a gneiss rich in quartz. South, at J. H. Moriarty's, there is 

 gneiss also rich in quartz, and a dark arenaceous schist. From this point 

 south-east, on the road to Surry as far south as R. E, Smith's, and also 

 in the road east from E. Slade's, the schists are like those of the Coos 

 group. But fifty rods north-west of T. A. Bolster's, there is a greenish 

 quartzose rock in which there is hornblende ; this is interstratified with 

 a dark gray gneiss and pyritiferous schist. On the road south from 

 Bolster's, we have the wrinkled argillaceous mica schists of the Coos 

 group. In the south part of Alstead, on the Surry and Alstead road, we 

 have a wrinkled and contorted mica schist. Just below Robbins's there 

 is a broad band of coarse granite, mostly feldspar ; and on both sides of 

 this there is a mica schist, common elsewhere in Alstead. At a turn in 

 the road, three quarters of a mile north of Robbins's, there is gneiss rich 

 in quartz, and above this mica schist. At the forks of the road near E. 

 H. Flint's, there is hornblende schist ; but east, to J. B. Cady's, we have 

 gneiss ; north from Alstead centre to Ellis's there is also gneiss, and east 

 of these two points there is mica schist ; but with this, at J. Blood's, there 

 is hornblende schist. As we go southward, on the road from Blood's, we 

 come to the micaceous gneiss of the White Mountain series, and there is 

 a well-marked outcrop near the southern border of the town, at J. N. 

 Hodgkin's. On a road farther east, that runs south from Warren pond, 

 we have, at D. W. Sawyer's, a micaceous gneiss of fine foliated texture, 

 forming a transition state into mica schist, — and this is the character of 

 the rock south to the line of Gilsum. Near J. A. Kidder's it contains 

 coarse granitic veins that have been worked for mica ; and there has been 

 a small excavation by the side of the road at Gleason's. A quarter of a 

 mile west of S. Goodhue's, mica has been quarried at intervals for many 

 years, and the rock is in places a genuine gneiss, and frequently contains 

 fibrolite. Along the top of a ridge there is an immense coarse granitic 

 vein, in parts of which there are masses of glassy, translucent quartz. 

 On the road north-east from Gleason's the rock is generally a micaceous 

 gneiss. At D. Knight's, there is an opening that has been made for 

 mica ; also, one at H. R. Knight's. On the road the rock is more like 

 mica schist, contains garnets, and is often pyritiferous. North-west of 

 the house there is a coarse granitic vein, and then the rock resembles 

 the gneiss of Marlow, which will be described under the division of 



