SCIENTIFIC SURVEY. 235 



opposite side of which interesting white rocks crop out on the 

 sides of steep mountains. These are probably granite, though 

 they resemble beds of limestone showing their edges in true sedi- 

 mentary style. In the north-west part of Camden the mica schist 

 occasionally appears with the gneiss — also a single ledge of horn- 

 blende schist with a small northerly dip. A range of high moun- 

 tains in the west part of the town are gneissic, running north-east- 

 erly from Congress mountain in Warren. The names of several 

 peaks are Spruce mountain, Ragged mountain and Bald mountain. 

 The last two are appropriately named. Immense disturbances 

 must have accompanied the elevation of these mountains, for at 

 the base of Bald mountain, east of Hosmer pond, the strata run 

 at right angles with their course at the summit of the ridge ; and 

 neither of the two courses are the common ones in this region ; for 

 the one is east and west, and the other north and south, while the 

 common strike is a north-east and south-west course. 



In Union we find more regularity in the position, although folds 

 are more common. Cobb's hill, in the village, is an anticlinal 

 knob of highly ferruginous mica schist. Near the north line of 

 Union, on the east side of Sennebec Pond, the rock is largely 

 quartz— particularly in the vicinity of the iron ore. Xear the 

 quartz the strata are mostly of mica schist. In other parts of the 

 town we saw only the gneissic variety. 



This formation, as it runs into Appleton, is mostly mica schist. 

 In Hope, the gneiss predominates. Near Hobbs' pond there is 

 pyritiferous mica schist, and mica schist with granite is developed 

 adjacent to Bartlett's limestone. 



East of Megunticook and Battle Mountains in Camden, a sort of 

 spur of an imperfect gneiss may be seen. Following up the coast to 

 the "Beach" in Lincolnville, a siliceous slate is found, which we 

 suppose to constitute a portion of the gneiss formation. In the 

 south part of Northport feldspathic mica schist appears ; and to 

 the north some talcose rocks are interstratified with the gneiss. 

 In the principal portions of Lincolnville and Xorthport gneiss 

 abounds. 



The last belt of gneiss represented on the map is in AValdo. All 

 that we saw was of an inferior quality. Some large veins of gran- 

 ite appear in it. Ten miles west of Belfast there is a coarse mica 

 schist containing garnet, tourmaline, hornblende, and large masses 

 of feldspar. 



