532 STRATIGRAPHICAL GEOLOGY, 



est breadth. The most north-eastern of these areas in Sanbornton is five 

 miles distant from the southern end of the typical district of this rock in 

 Meredith. On the west side of Cawley's pond are many outcrops of 

 gneiss. A little north are three embossed ledges, dipping north-east, and 

 farther north they dip north-west. There is a hill of granitic rock, the 

 highest land in the north-east part of the town, where the dip is north- 

 westerly. The rock has been quarried for underpinning to a slight 

 extent near O. Eastman's. It is not easy to say this does not belong to 

 the mica schist series, particularly since granitic beds are found in the 

 neighborhood, such as belong to the later series. I have specimens of 

 gneiss from D. P. Tucker's, a mile north of Tilton village, with a north- 

 west dip. At Tilton village the Montalban strata dip high to the south- 

 east, and another exposure of gneiss occurs near C. Emerson's, in the 

 north corner of the town, next New Hampton. 



In Northfield, near D. M. Howard's, about a mile from Tilton, granitic 

 gneiss dips 30° N. 65° W. Towards T. E. Poor's the ledges have the 

 segregated aspect so commonly, seen about Lake Winnipiseogee, and the 

 dip is higher. There is gneiss, also, about the village of Northfield centre, 

 but our information concerning this area is meagre. 



The shape of the Salisbury area indicates the presence of an anticlinal 

 in the eastern portion, as the newer Montalban schists wedge into it from 

 the south along the valley of Mill brook, and from the north include Salis- 

 bury centre. The Montalban rocks of Franklin dip north-west to their 

 very end, crowding closely upon these compact gneisses standing verti- 

 cally and with a strike west of north along a line of hills near the east 

 town line of Salisbury. The contrast between the two formations is well 

 marked, and their relative positions indicate an unconformity between 

 them. These hills are unnamed on the map, and are a mile and a half 

 east of South Salisbury. At the village the rocks are more like the 

 Montalban, and perhaps this eastern range should be isolated from con- 

 nection with the gneisses west of the village, at H. Heath's and A. Ward- 

 well's. These gneisses occur for two miles south of South Salisbury, on 

 the road to Boscawen, with north-westerly dips. Ledges appear at the 

 town line, and at C. Smith's in Boscawen. The ridge a mile and a half 

 north of Corser hill, separating the Blackwater from its tributary through 

 Great pond, is composed of this gneiss. South of Corser hill, outcrops 



