150 STRATIGRAPIIICAL GEOLOGY. 



to be made almost altogether of the andalusite schist of the White Moun- 

 tains. The dip of the rock on the summit of the north peak is N. 5° K. 

 10°, On the ridge extending north-east from the summit the rock is of 

 the same character as on the ridge south, except that there is a band a 

 mile and a half from the summit where the fragments are more rounded 

 than they are elsewhere, and they are smaller than they are generally on 

 the mountain. The breccia extends south to within a mile and a half of 

 Diana's Bath. 



Albany granite. From the Saco in Conway, extending west along 

 Swift river, perhaps two miles above where the road crosses this stream, 

 there is a granitic rock everywhere porphyritic ; but, about a mile south 

 of Swift river, we find a rock of an entirely different character. This 

 rock, though it is not always uniform, yet in its numerous outcrops it 

 has the same general characteristics. It consists for the most part of a 

 greenish feldspar, almost black vitreous quartz, and there is sometimes a 

 little hornblende irregularly distributed through it. It weathers wdiitish, 

 and to so great a depth that no one would suspect the character of the 

 rock from its exterior, and it is with the greatest difficulty that unweath- 

 ered specimens can be obtained with an ordinary geological hammer. 

 At Champncy falls, which are the most picturesque of all the many falls 

 and cascades about the mountains, numerous walls of this rock can be 

 seen. Here the rock' is so cut by joints that they give to it the appear- 

 ance of being bedded, and near where the falls begin some of the blocks 

 have been moved and tilted up. The space between the blocks being 

 filled up, the water stills runs over them, so often the effect is very 

 fine. At Pitcher's falls, — called also Champney falls, — the water descends 

 nearly perpendicularly, except that there are three projections on which it 

 strikes. There is another outcrop of this rock four miles east, at Ellen's 

 falls, on a small stream that flows into Swift river nearly opposite Eagle 

 ledge. The water falls twenty feet, and it has worn an oblong cavity in 

 the rock twenty-five feet in length, from five to six feet in width, and 

 fifteen feet or more in depth, which is filled with water. This rock is 

 found on the east side of Chocorua, and it is also probably the rock of 

 the north peak of that mountain, but the rock is so weathered it can- 

 not be determined with certainty whether it is exactly the same or not. 

 The same is also the case with the rock of the summit of Passaconnaway 



