GEOLOGY OF THE MERRIMACK DISTRICT. 54/ 



pirt of Milford, through East Wilton. The quartz dips 78° S. 40° E., 

 just beyond a railroad cut through a hard sienitic rock. In the south 

 edge of the village, following the carriage road instead of the railroad, the 

 next interesting rock is a granite like the Concord in general appearance, 

 but full of small, distinct crystals of feldspar. This being of peculiar 

 aspect is easily recognizable, and will be mentioned as occurring at the 

 west end of the next section. The sienite rock at the railroad cut also 

 reminds us of the related rock near Dodge's, at the west end of Fig. 89. 

 The gneiss adjoining this porphyritic granite dips 85° N, 80° W. Drift 

 conceals the ledges for more than a mile. Ferruginous mica schist, 

 dipping 70° N. 25° W., crops out shortly after crossing the stream, in the 

 north part of Wilton. At the next crossing of Stony brook the mica 

 schists dip 40°-45° N. 40° W., and are inclined at a smaller angle beyond. 

 Half a mile farther they dip 30° in the same direction, with coarse granite 

 beds. Near a cabinet shop the dip is 65°, Just in the edge of East Wilton 

 is a coarse granite. At the village is mica schist. At the tannery, in the 

 east part of the village, are veins of coarse granite, with a small dip. 

 The dip is 75° N. 75° W. near the new factories, in the west edge of 

 Milford, before crossing the river. The rock next the quartz on the hill 

 in Milford, already alluded to as dipping 75° N. 70° W., is hardly a gneiss. 

 The greater part of this section has been occupied by a low-dipping, 

 coarsely-grained mica schist, the equivalent of those in Figs. 87, 88. 



Fig. 91 illustrates the rocks between Temple and the east line of Wil- 

 ton. The sienitic rock of Figs. 89 and 90 is wanting next the quartz. 

 The gneiss west of the quartz is of the angular-breaking kind, dipping 70° 

 N. 80° W. Between the quartz locality and a north-east road from Tem- 

 ple, the gneiss contains much feldspar, and dips 65° N. 70° W. It is ob- 

 vious that the quartz must correspond with these dips just recorded of 

 the gneiss upon both sides of it, its own inclination not readily showing 

 itself. The porphyritic granite seen in Lyndeborough is much thicker in 

 Temple, making its appearance next on the south-east road from the village. 

 Next is granitic gneiss, followed by ferruginous mica schist, half a mile 

 distant from the hotel, dipping 85° N. 50° W. on the average. The roads 

 are now inconveniently located for our purpose, and the next ledge seen 

 is at West Wilton, two miles distant from the last ledge, but as it courses 

 with the strike it cannot be far distant from its place on the section. There 



