524 STRATIGRAPHICAL GEOLOGY. 



part of Bradford are thought to constitute another anticHnal, the dip of 

 30° S. 52° E. having been measured by A. Putney's. An anticHnal is put 

 down for the highlands farther east, and the mica schist between Brad- 

 ford centre and Bradford pond is reckoned as occupying an inverted axis. 

 Ledges appear at the height of land, at the Baptist church, and along the 

 west shore of Bradford pond. The last part of these dip easterly. Next, 

 there is a considerable area of fine-grained gneiss supposed to belong to a 

 later age, and occupying a basin in this older group. The east side of 

 it is reached at Day pond, in the south-west corner of Warner, where 

 high precipitous ledges of the porphyritic variety occur. Another mica- 

 ceous schist, dipping 70° E. 80° E., occurs next on the Warner and Hen- 

 niker line. Farther east, the dip is twenty degrees less. The whole 

 width of this outlier is about half a mile on the town line, wider to the 

 south. Next reappear the porphyritic gneisses, continuous to the most 

 north-eastern school-house in Henniker. The schist on the western bor- 

 der of the gneiss, east of the porphyritic, dips 75° S. 70° W. Thus this 

 section also shows the fan-shaped stratification. 



The occurrence of a curved line of hills in Washington, Bradford, and 

 Henniker, is interesting. Lovewell's mountain is the highest and farthest 

 west ; the others are much elevated, and curve like a bow till the Contoo- 

 cook river is reached. A trip from Bradford mills to Hillsborough Bridge 

 showed porphyritic gneiss as far as Bible hill. Ledges were abundant 

 near E. Cheney's, Bradford centre, and on the high hills in the south part 

 of Bradford ; and on Murdo hill, at the school-house near Loon pond, 

 Hillsborough centre, and Peaked hill, in Hillsborough. Other localities of 

 these rocks in Hillsborough appear at the Johnson place, and at the house 

 of Miss Gibson, west of the lower village. It outcrops at the head of 

 Long Falls, on the Contoocook river, dipping possibly 28° N. 52° W ; 

 about a mile farther north-east, two miles south-east from West Henni- 

 ker, on the northern slope of a large hill, and at Henniker village, having 

 the strike of N. 5° E., judging from the course of the longer axis of the 

 feldspar crystals. The slates on the east dip towards the porphyritic 

 gneiss. 



In Warner, the Mink hills are all composed of this ancient rock. South 

 of Bald Mink, a ledge of it, not necessarily typical of the mass, dips 20° 

 W., and carries a vein of hyaline quartz, four feet wide. Ledges are 



