79 



there in mass, its materials, both the carbonate of lime and the 

 commonly prevaiWng graphite and condrodite, ^re frequently min- 

 gled in variable proportions with the minerals of the intrusive 

 veins. This incorporation of the altered products of the blue 

 limestone, its calcareous spar and its graj^hite and condrodite, is 

 much more intimate and more extensively seen in the ridges to 

 the southeast, where the regular belt of the altered rock in 

 contact with the igneous vein has resisted denudation. 



Northeast of the locality to which the above descriptions have 

 been principally confined, the belt of white crystalline limestone 

 runs for a distance of between two and three miles, forming in 

 some places a tract of considerable breadth. In some portions of 

 the line the altering rock is a dike of greenstone, of a close grain 

 and extreme toughness and density. 



About two miles to the southwest of the place first mentioned, 

 and near the road which crosses the mountain going from Hope 

 towards Hacketstown, we cross the crystalline limestone at a 

 point about a mile to the west of the little village of Danville, not 

 far from the southwest extremity of the Great Meadow. At this 

 locality the rock has assumed a somewhat unusual colour and 

 aspect; the carbonate of lime, which chiefly constitutes the mass, 

 being in the condition of rhombic spar, whose tint very much 

 resembles that of ordinary reddish felspar. The presence, in 

 some parts of the rock, of numerous small crystals of greenish 

 aiigite, with occasional scales of graphite and even of dark mica, 

 impart to the whole mass a very marked resemblance to certain 

 varieties of granite, in which a pink felspar is the prevailing 

 mineral. An inattentive glance at the rock will leave the travel- 

 ler deceived as to its nature. 



The igneous actions afiecting the limestone, display their ordi- 

 nary phenomena at intervals for several miles still further towards 

 the southwest. 



A small belt of the crystalline rock is traceable in the prolonga- 

 tion of the general line, occupying a spot a little to the southwest 

 of the small lake called Green's Pond, and not far from the southern 

 termination of Jenny Jump. 



We again find it in the same range along the northwest base 

 of Scott's Mountain, in two unimportant bands, the last which 

 we discovered in the State. One of these occurs between the 



