DESCRIPTION OF THE GENERAL SECTIONS. 64I 



on the line of strike, but an additional band shows itself, the continuation 

 of the Hooksett area, in and on the west side of the Merrimack river in 

 the south part of the town. On Campbell's hill is the southern range of 

 quartz, not far from its eastern termination. Through Hooksett the rocks 

 dip westerly to just beyond the western band of quartz, where there is 

 evidence of a short synclinal, which ought to cause a repetition of the 

 quartz if it be a genuine basin. There would seem to be an anticlinal 

 following, between the south end of Bow and Dunbarton. These rocks 

 all belong to the Lake gneiss, but that which follows in Dunbarton is 

 Montalban, and strangely enough it presents the anticlinal structure at 

 Kimball's pond. On Dunbarton hill the Lake gneiss reappears with 

 west dips. Hence this Montalban development either rests unconform- 

 ably upon the Lake gneiss, or else there is an inversion equal to that 

 described as characterizing the porphyritic gneiss (p. 529). In the east 

 part of Weare occurs one of these porphyritic gneiss areas, with westerly 

 dips. This has Lake gneiss upon both sides, all three bands similarly 

 inclined, and hence inversion must be invoked to explain the phenomena. 

 In the middle of Weare is the westerly-dipping mass of Mt. WiUiam, con- 

 sisting of Rockingham mica schist, and resting upon the Lake gneiss, 

 which is more characteristically developed in this town than is usual 

 away from its typical region. We have evidence of two foldings in the 

 west part of this area, the last dipping westerly, to come up again in the 

 narrow range to the east of Deering village. The rock between the 

 Merrimack ferruginous slates, partly in Weare and partly in Deering, 

 and so far as seen along the section, dips uniformly to the north-west. 

 West of the Deering gneiss belt the ferruginous slates reappear, with a 

 very distinct basin shape, resting upon still another gneiss belt along the 

 Contoocook river. The two gneisses are also supposed to dip towards 

 each other beneath the ferruginous formations. 



In the Contoocook gneiss, on the west side of the river in Antrim, is 

 an outher of Montalban dipping with the former, because apparently 

 caught in it and forced to conform to it. On reaching the valley of the 

 northern branch the porphyritic gneiss of the main central range is met 

 with, dipping easterly underneath the Lake gneiss. Very soon the dip 

 is reversed, and in the west part of the town there is a well-marked syn- 

 clinal in it. The easterly dip is then continuous to Stoddard village, 

 VOL. II. 80 



