GEOLOGY OF THE WHITE MOUNTAIN DISTRICT. I I I 



only where they have been observed ; and the spaces where nothing has 

 been discovered are given upon a correct scale. From this figure one 

 gets the impression that the first named is the oldest group. The section 

 should be compared with that on Plate VI, to which reference has been 

 made at the outset. Fig. ii shows the only locality in the state where 

 the Bethlehem and Lake gneisses are known, at the present moment of 

 writing, to approach each other so closely. 



To this series I have referred a narrow band of gneiss, extending from 

 the unnamed peak (5) in front of Mt. Hale (vol. I, p. 198) through the 

 south part of Carroll into Franconia. The rock is a fine-grained gneiss, 

 similar to that in the north part of Whitefield and Littleton. The ridge 

 just spoken of is the first hill seen south of the Twin Mountain house, 

 forming the dividing ridge between the Ammonoosuc and its tributary, 

 called Little river. It slopes gradually from mountain (5) to the mouth of 

 the tributary, one or two miles below the hotel. At a dam, more than 

 half a mile above the mouth of Little river, the gneiss dips 35° S. 27° E. 

 The north wall here is high and steep, as if the stream flowed through a 

 canon. There is a minor undulation half a mile higher, the dip being ten 

 degrees northerly. On top of the ridge, in passing directly from the 

 hotel to Twin mountain, the gneiss dips 50° southerly. About a mile 

 above the junction of Little river with the Twin Mountain branch, a 

 small slide has uncovered ledges of this rock, rather conglomeratic in 

 character, dipping 80° S. T]° E. A quarter of a mile higher up, the ex- 

 treme easterly point of this band is reached, standing vertically, with the 

 strike N. 20° E. The width of this band is not known to exceed half a 

 mile at any point. 



Proceeding from Little river towards Franconia, it is supposed that 

 this band must lie in front of the "Nubble." This hill rises sharply more 

 than three hundred feet, and was found to consist of an enormous vein of 

 very coarse granite. The specimens brought from it remind one of the 

 coarse veins yielding mica in Grafton ; but no certain evidence has been 

 obtained to show that the Nubble belongs to this set of strata. Speci- 

 mens from back of J. L. Rine's in Franconia appear to belong to this 

 range ; also, those lying between the porphyritic gneiss and Albany 



