Protrusions of Granite. 



479 



granite expands. But the principal object is to show two sections a- 

 cross these rocks,four rods apart. The change in the dip from 80° west, 

 to 80° east, on the section from A to B, is striking ; and is explicable 

 alone on the supposition of a disturbing force exerted by these huge 

 masses of granite. 



The section below (No. 9.) crosses from west to east, a ridge of 

 mica slate and granite, about four rods wide. The stratum a, at its low- 

 er part, dips easterly about 25° or 30°; which is the usual dip of the 

 slate in the vicinity; but the upper part of this stratum is thrown up 

 nearly perpendicular; resting against the granite. This granite, b, is 

 3 or 4 rods across; when we find another stratum of the slate, c, hav- 

 ing an easterly dip of nearly 50°. Below this another mass of granite, 

 d, appears; but it is soon hid by the soil. Locality, near the line be- 

 tween Conway and Williamsburg. 



(9) Granite and Mica Slate ; Conway. 



No. 10 is in the town of Russell, on the road from Westfield to Blan- 



