Kies— Geology of Orange County. 



455 



offshoot of the large knob penetrating the gneiss south of the road. This 

 rock was found to be much decomposed in the sections examined, but i- 

 probably a camptonite. In front of Stockbridge's hotel, east of Central 

 Valley, the gneiss strikes N. 40" E. and dips 80° S. K. From the road crossing 

 the mountain just north of Stockbridge's, up to the next road across the 

 mountain, about two miles further, the gneiss is cut by many veins of coarsely 

 crystalline red granite. This is a mixture of bright red feldspar, large flakes 

 of biotite and a little quartz. One of these veins crops out along the road 

 opposite the entrance to Stockbridge's lane. 



The gneiss ridge north of Stockbridge's, judging from a number of 

 strikes and dips taken, is apparently a synclinal fold. On the eastern side of 

 the valley east of this ridge, and about one and one-half miles north of 

 Stockbridge's, there is, along the road, a ledge of rock, which in many respects 

 resembles the contact zones at Mounts Adam and Eve, in Warwick township. 

 In the lower portion of the ledge and a few feet above the road, the rock is a 

 coarse-grained mixture of pyroxene, scapolite and feldspar, with some quartz 

 and calcite. Where cavities exist in the rock, good crystals of pyroxene 

 are not uncommonly developed, but terminations are rare. The feldspar is 

 most abundant at the northern end of the exposure and higher up the slope. 

 Up this slope the rock becomes a coarsely crystalline aggregate of feldspar 

 and pyroxene, the former predominating. Some quartz is present. No good 

 bedding was noticed except in the ledge a few feet above the road, w here 

 there seems to be a low dip to the east. The rock on the west side of the 

 road across the brook, is a hornblendic gneiss which, in the bed of the stream, 

 is cut by two dikes, one four inches wide, the other six feet; they are both 

 camptonites. The exact relations of this scapolite-pyroxene zone and its 

 significance require further examination before they can be explained. It is 

 possible that this may represent a contact zone between a probable granite 

 rock to the southeast and the hornblende gneiss, or a limestone which 

 has been removed by erosion or faulted out of place. There is a short belt 

 of limestone about a mile to the north in this valley, but no outcrops of 

 limestone were found between these two points. The limestone belt 

 mentioned thins out at its southern end. 



At the south end of Popolopen pond, is a small bed of limestone forming 

 a natural bridge. It is a bed about forty feet wide and has a length of about 

 four hundred feet from the south end of the lake to its southern extremity 

 where it disappears under the meadow. The limestone is interbedded w ith 

 coarse-grained gneiss which strikes N. 50° E., and dips 70" E. on the w estern 



