5/8 STRATIGRAPHICAL GEOLOGY. 



dip sometimes descends to io°. At T. B. French's, beds of granite occur. 

 As far as E. F. Plummer's, ledges dip N. 60° W. The mica schist is red 

 at J. Flanders's, near the Meredith line. About the granitic rock, on the 

 high hill, the dip seems to be north-west, and to belong to this series 

 better than any other, though there is room for difference of opinion. At 

 J. & H. N. Marsh's, a mile west of the gulf, the dip is 80° N. 85° W., and 

 the ledges are common between this point and Tilton village, some of 

 them belonging to an older series. No further observations have been 

 recorded of dips in Tilton. The only points of interest ascertained are 

 the fact of the unconformable relations of the mica schist to the porphy- 

 ritic gneiss of Meredith, with an axis at the gulf. The strike of the 

 schists points square across the gneiss. In the north-west part of San- 

 bornton the dips are mostly to the north-west. The relations of the 

 several rocks across this area are shown in Fig. 96. It starts near the 

 Pemigewasset river in Bristol, exhibits the anticlinal in that valley in the 

 Montalban series, then a synclinal hill, and mostly north-west inclinations 

 over the Sanbornton mountain ridge, and two ridges of gneiss, — the last 

 in the valley of the outlet of Cawley pond. After this follow the mica 

 schists with the same dip on the "Square" ridge, and the various gneisses 

 of Tilton and Northfield. 



Canterbury, Northfield, etc. This north-western extremity of the blanket 

 occupies also portions of Belmont and Gilmanton, west of the eastern 

 boundary of the district. The relations of the rocks appear in a section 

 (Fig. 99) from Belmont to Lower Gilmanton. At Belmont occurs one of 

 the minor irregularities liable to be seen in any of our formations. The 

 average dip is south-westerly. There is evidence of a synclinal near the 

 town line, and it may be the same undulation with the shallow basin on 

 the north side of Little pond in the south corner of Belmont. South-east 

 from the pond is a large mass of coarse granite, considerable ferruginous 

 and other uncanny rocks. Through Gilmanton the dip is monoclinal, 

 north-westerly. The rock is ferruginous north-west from the centre 

 village, and also at the lower village, but not so between them. We find 

 the dip north-west on top of the hill, between Shell camp and Rocky 

 ponds. The Bean Hill area in Northjfield and Canterbury has considerable 

 granite in it. That near Little pond crops out again in the Pinnacle, — 

 possibly it is contiguous, — with the same north-west dip. There is a large 



