544 STRATIGRAPHICAL GEOLOGY. 



drawing conclusions from these facts, it will be well to describe a few 

 carefully measured sections from one to the other range in Goffstown, 

 New Boston, Wilton, etc. 



Sections across the Quart::; Ranges. In Fig. 87 is a somewhat gener- 

 alized section from the Oil Mill station in Weare to the locality on the 

 west line of Manchester, This does not run square across the strike. 

 The quartz dips 70° N. 25° W., and is followed by a nondescript siliceous 

 gneiss with the same position. Between here and Goffstown the ledges 

 are mostly concealed by alluvium. From the study of the rocks not far 

 away it is believed the first rock next the quartz is a gneiss, breaking 

 naturally into long angular pieces. Next is a large amount of fine- 

 grained granite or granitic gneiss, dipping perhaps 65° N. 40° W., as at 

 J. Butterfield's, on the south side of the river. This band passes up 

 the west flank of the Uncanoonucs. There is then a gneiss extending 

 to the east part of West Goffstown village. Next is a broad band of 

 coarse mica schist, cropping out along the road for a mile and a half, 

 nearly to the centre village. This is the range occupying the space 

 between the two Uncanoonucs, farther south. Gneiss succeeds, a nar- 

 row band occurring where the road bends to the north-east to enter the 

 village. This is followed by narrower belts of mica schist and gneiss 

 before reaching a broader mica schist strip at the west end of Goffstown 

 centre. It is mostly mica schist, with a north-west dip for a mile's 

 width. The rock is somewhat ferruginous and coarsely grained. There 

 is a coarse granite at E. Sargent's, which may be followed a mile north- 

 easterly on the road to the north-east corner of the town. Beyond the 

 first mile of this north-east road the ledges are concealed by drift. East of 

 Sargent's, on the Manchester road, is a few rods width of mica schist, 

 but the rock is mostly coarse granite to a bend in the road east of E. 

 Whitney's. The same may be seen on the southern slope of the hill 

 towards the river. This is succeeded by a half a mile width of granite, 

 in texture like that quarried in Hooksett. This is somewhat coarser 

 than the Concord variety, but otherwise closely resembling it. Near L. 

 Hunkins's or W. Wortley's gneiss is found, which continues to the east 

 line of the town. A portion of it, by E. Morrill's, is usually white and 

 siliceous. About a quarter of a mile's width adjacent to the quartz, 

 mostly within the limits of Manchester, is composed of a coarse mica 



