368 B. K. Emerson — " Bernardston Seines" of 



thick, of a very rusty limestone, carrying abundantly light 

 colored garnet, in large shapeless masses, and light green 

 pyroxene. A long slope follows with scanty outcrops of mica 

 schist, still fine-grained and without staurolite, but with no 

 trace of hornblende ; and, at its foot, succeeds a heavy bed of 

 hornblendic rock about twenty meters thick, which by the 

 quite abundant development of feldspar is in large part a 

 complete quartz-diorite. Except for the appearance of feld- 

 spar, in small irregular white spots, it does not deviate from 

 the usual type of the hornblendic rock of the area. It is fol- 

 lowed almost immediately, though the exact contact could not 

 be found, by a bed about fifteen meters thick, of a iine-grained 

 granitoid quartzite, which is indeed, in its whole extent, a 

 complete granitoid gneiss, never fissile, and faintly laminated 

 only by the parallel arrangement of the biotite, or wholly 

 lacking this even, and becoming a fine-grained tough granite, 

 largely feldspatliic, and with many streaked cleavage surfaces, 

 and light gray from the small amount of the biotite. It can be 

 followed here for a long distance, breaking off against a fault 

 in the northeast direction, and going southwest, across Dry 

 brook. Its place between the two heavy hornblende bands 

 seems to be taken by a very fine-grained massive quartz rock, 

 with abundant fine scales of muscovite, and with large round 

 plates of biotite set at every angle. It appears again farther 

 northeast at the last road across the range, and can be followed 

 thence continuously, over the high hill west of South "Vernon 

 station and across the plain in Yernon, trending here directly 

 toward the point where the road to Yernon goes beneath the 

 railroad. It is unlike the quartz-conglomerate on the west, and 

 feldspathic quartzite to be described on the east ; and conform- 

 ing in dip and strike with the mica schist, and making all the 

 curves with it, it must be looked upon as a separate band in 

 the mica schist, and cannot well be derived by folding or fault- 

 ing from the other quartzite. 



On the section line it is separated by a small thickness of 

 mica schist from another heavy hornblendic bed, which latter 

 is itself parted by a thin layer of schist, and separated by a 

 heavy bed (30 meters) of a dark gray mica schist, much coarser 

 than the beds below, and carrying abundantly transversely 

 placed biotite, small garnets, and large staurolite crystals, the 

 latter in single crystals, and in twins according to both the 

 common laws. This greater coarseness of the texture, and the 

 great abundance of staurolite in the upper beds of the mica 

 schist, are the rule through the whole length of the range, and 

 militates against any attempt to make out repetitions in the 

 series now gone over. This band is capped by another heavy 

 bed of hornblende rock 20-25 meters thick, which rises in a 



