152 STRATIGRAPHICAL GEOLOGY. 



granite, the narrow Albany variety, the slate breccias, and other rocks 

 composing the upper part of the mountain, are well shown by colors 

 upon our hcliotype of Mt. Pcquawket taken from the south. 



The whole of the Green hills are of the Conway granite. On the 

 summit the rock is fine-grained, with jointed planes dipping north-west- 

 erly twenty degrees. At the west base the inclination is less. The 

 highest of these mountains, though 2390 feet above tide-water, seems 

 to be composed of the same granite with that constituting the base of 

 Pequawket. The top of the Conway granite on the road up Pequawket 

 is about goo feet, so that the slope between these two points is about 

 four degrees. To the south of North Conway, in the valley, ledges are 

 not abundant ; but the south-westerly limit of the lower granite is prob- 

 ably near J. Tuttle's house, where a ledge of it crops out. Pine hill may 

 also show a ledge of it. There are no ledges between Conway Corner 

 and Conway Centre, nor for a considerable distance towards Walker's 

 pond and Eaton. These latter ledges, when reached, arc of the underly- 

 ing Montalban series. 



Concerning the granites in this neighborhood, Mr. Vose, in his report 

 of 1869, writes as follows. He did not distinguish between the three 

 kinds of granite occurring here. 



At Chocorua, in the Swift River Valley and all along through Conway and North 

 Conway, we find the principal rock to be a coarse granite with little or no mica. The 

 same rock, or one very much like it, occurs at the southern base of P'equawket ; but 

 does not appear to extend higher up than four or five hundred feet above the base of 

 the mountain. The "Ledges" opposite North Conway, are chiefly, if not entirely, of 

 granite of various degrees of fineness. The vertical striped appearance of these 

 ledges is due to the water which runs down over them, as far as I could judge, and 

 does not show structure. The granitic rocks through the whole of this region are 

 much cut by joints, but whether any true bedding can be made out is doubtful. The 

 five summits cast of North Conway village, called the Green Hills, as also the "Ledges," 

 and, in fact, all exposures of rock in this region, show what might perhaps be called 

 horizontal or nearly horizontal stratification ; but this bedding, if it is such, must not 

 be confounded with an apparent bedding caused by a scaling off of the rock in concen- 

 tric layers, from five to ten feet thick, an example of which may be seen in the upper 

 part of the large or south ledge (White Horse). Over the whole region fiom Jackson 

 to Tamworth, and far over into Maine, there is seen a well marked orographic feature 

 which may give a clue to the arrangement of the rocks in this district. I refer to the 

 general outline of the hills, which present almost universally a long gentle slope to the 



