6o6 STRATIGRAPHICAL GEOLOGY. 



posed of a fine-grained granite. The ascent was made from the north 

 side. Near the end of the road, at the south base of Parker mountain 

 in Middleton, the same rock occurs. Next, on a trip from Wolfeborough 

 to Middleton, I found a fine-grained granite just to the south of the Lake 

 gneiss, near Rust pond, containing large spots of hornblende. A granite, 

 quarried somewhere in the southern part of Wolfeborough, resembles the 

 Concord very much superficially, but it splits and breaks more like the 

 Moose Mountain rock. Through the north part of New Durham a red 

 granite predominates. At the south end of Cropple Crown it is some- 

 what like the finer variety of Conway granite found about Mt. Nancy. 

 I think it is rather coarser on the east side, and this mountain may be 

 regarded as a granite. Very pretty banded traps occur in this granite. 

 There is one much coarser from a large hill north of Mt. Bet. From Mt. 

 Bet and the region east comes a similar red, crumbling granite, not un- 

 like that comprising the Profile in Franconia. These hills are sugar-loaf 

 shaped, crumbling down in the usual type of granitic decomposition. 

 Birch hill is sienitic, as indicated by loose blocks at its base; and Mt. 

 Eleanor, for a like reason, may be said to be composed of a fine-grained, 

 reddish, normal granite. It has about the grain of the Concord granite. 

 This whole eruptive mass is therefore quite unique, and well worthy of 

 further study. It is over eight miles in length. Merrymeeting lake is 

 very prettily situated near its southern extremity. The granite seems to 

 prevail at the western, and the hard feldspathic and hornblende varieties 

 at the east. 



Giinstock a7id Red Hill. Two areas are alike in composition, — the 

 Red hill in Moultonborough, and the Belknap mountains. These are all 

 true sienites. The first is only three miles long. It is composed of two 

 summits, the most northern being the highest, and is much visited for 

 views, as it rises conically from quite a plain. The rock is a genuine 

 sienite, abounding in hornblende. Some ledges show the hornblende as 

 conspicuously as the coarse granite veins of Cheshire county carry their 

 tourmalines. Two kinds of feldspar prevail. All these eruptive rocks 

 will be very carefully described by Mr. Hawcs, in the mineralogical part 

 of this report ; and I will content myself with mentioning their general 

 occurrence and relations to the stratified rocks adjacent. Vertical joints, 

 with a north-eastern strike, cut through Red hill. The junction of the 



