GEOLOGY OF THE WHITE MOUNTAIN DISTRICT. 2O3 



and here they are not the most characteristic, but on either side of the 

 railway there are many outcrops where it can be seen. j. h. h. 



Additional Facts. 



Mr. Huntington communicates to me in a letter a few additional facts 

 concerning the rocks along the Grand Trunk Railway in Maine, which 

 are worthy of preservation in this connection, and are herewith presented. 

 It appears that the Montalban series prevails over most of the region. At 

 my request he also states a few facts additional to what we have known 

 concerning the geology of this region, which he observed in the summer 

 of 1875, when not emi^loyed in the service of the geological survey. 



At Gilead we first find the White Mountain gneiss, where the prevailing dip is east- 

 erly. The gneiss here has been evidently much disturbed. At Bethel we find granitic 

 gneiss, and the stratification is very indistinct. At Bryant's pond the gneiss is much 

 coarser than the common granitic gneiss of the Montalban group. At West Paris there 

 are immense veins of coarse granite in the gneiss. Half a mile south-west of South 

 Paris the White Mountain gneiss dips S. 52° E. 18° ; a few rods south-west of this 

 outcrop there is an impure limestone interstratified with the gneiss, and there are veins 

 of coarse granite. 



At Mechanic falls the dip of the White Mountain gneiss is S. 80° E. 18°. Half a 

 mile east of the village the dip is E. 20°. It has here, as at the falls, numerous large 

 veins of granite that contain tourmaline ; and the feldspar is often of a bluish color. 

 At Danville Junction the dip of the gneiss is quite variable ; sometimes it is N. 10° E., 

 but generally more to the east. The inclination is generally not far from 15°. Here 

 there are veins of both granite and trap. (See Hunt on Granite Veins*) At Pownal 

 station the White Mountain gneiss dips N. 10° E. 68°, and variable. Half a mile N. 

 E. of the station the dip is S. 40° E. 25° ; elsewhere the dip is E. 18°. 



Mt. Pleasant (Me.) is composed of a granite very similar to that found in the upper 

 part of the Waterville Slide. The summit at the hotel is composed of a feldspathic 

 rock, the physical character of which is unlike that of any rock I have seen in New 

 Hampshire. 



In climbing up to King's ravine from Randolph, the rock for the first mile of the 

 way consists of a peculiar granite, unlike anything described in the report as belonging 

 either to the Montalban or Lake Winnipiseogee series. It should be referred to the 

 latter rather than to the former. 



There are no ledges at the head of Cutler's river, to the south of Tuckerman's ravine. 



Waterville and Sandwich. Israel's mountain is a gneiss. In texture it differs from 

 both the common and the White Mountain, and it has a northerly dip. Sandwich 



* Chemical and Geological Essays. By T. S. Hunt, p. 196. 



