GEOLOGY OF THE MERRIMACK DISTRICT. 565 



At E. Blodgett's, in the south-east corner of the town, is an east dip. 

 These are all characteristic Montalban outcrops. 



It would not be surprising if the andalusite mica schist of the north 

 end of Stinson mountain were identical with the similar rocks in Ells- 

 worth (page 472), and also with related layers in the central parts of 

 Woodstock. The Montalban of Mt. Weetamoo is now represented as 

 connecting directly with that composing the greater part of Sandwich 

 Dome, heretofore marked as an outlier (Plate XII). The granite of the 

 south-west corner of the town is more or less connected with the Rumney 

 and Plymouth area (pages 509, 510). At the high bridge over the Pemi- 

 gewasset at the south town line, and at the village on Beebe river, there 

 are ferruginous schists with high south-east dips. Mt. Prospect, in the 

 north part of Holderness, is mostly of porphyritic gneiss interstratified 

 with highly ferruginous schists, dipping N. 60° W. There is therefore a 

 synclinal axis between Prospect mountain and Campton. Specimens of 

 Montalban rocks have been obtained along Beebe river, east of Mrs. J. 

 Leavitt's, N. B. Crowell's, and at the fork of the road leading northerly. 

 Close by the east line of the town the dip is 57° N. 24° W. The same is 

 true respecting the south-west slope of Morgan mountain. Perch pond, and 

 at W. Brown's, in the south-east part of Campton, along the higher part of 

 Ryan's brook. Ledges occur at Plymouth village, and to the west and 

 south, one of them dipping 40° S. 60° E. In the west part of Plymouth 

 there is a small area of Lake gneiss, brought to light since the printing of 

 the pages previous to this one. At C. W. Nelson's and S. Morse's this 

 rock appears, with an east dip. At C. Nutting's, south of school-house 

 No. 10, a ferruginous schist dips 65° W. We find chiefly ferruginous 

 mica schist between Plymouth and Squam lake, with westerly dips. At 

 the town-house on the north side of Little Squam lake, a quartzose schist 

 dips 70° N. 64° W. East of school-house No. 2 of the old town of Hol- 

 derness is a ledge of quartz like that described in Hillsborough county. 

 The line of Section VI, passing through Ashland, Bridgewater, and the 

 south part of Plymouth, represents westerly dips to Bridgewater, and 

 then the reverse, enabling us to state the presence of a synclinal axis on 

 this route. The similarity between the ferruginous schists belonging to 

 the porphyritic and the Montalban groups in Holderness, Ashland, Ply- 

 mouth, Campton, etc., produces trouble when attempting to assign the 



