Geology, fyc, of the Connecticut. 6!> 



No. 56 Same as No. 51, extending nearly a mile, dip 

 at first 35°, but gradually decreasing to 15°. The direction 

 of the strati of this rock is quite different from the other va- 

 rieties, which generally have a direction between north and 

 northeast. But this variety is so much wheeled that it runs 

 not far from east and west ; and in passing up the river we 

 sail for a time nearly parallel to the direction of the strata. 

 I do not see why this rock might not be employed for roof- 

 ing ; and if so, the situation of the quarries would surely be 

 very advantageous. 



No. 57. Same as No. 9, strata nearly perpendicular, but 

 leaning a little to the east, and their direction nearly the 

 same as that of all the varieties mentioned except \he last. 

 Thickness 10 rods. 



No. 58. (No. 8.) Blackish tortuous slate — Stratification ir- 

 regular and the layers dividing into numerous shapeless pie- 

 ces by fissures in every direction. The surface of these 

 amorphous pieces is frequently a little glazed. Rock, friable, 

 scarcely micaceous, argillaceous, strata leaning a few degrees 

 to the east, 20 rods thick. This rock forms a bed at the island 

 in the falls in the Connecticut three miles below this spot, 

 and there it is exposed to the occasional action of the water 

 and is disintegrated so as to leave the superincumbent 

 strata projecting over it several feet, and it very much re- 

 sembles impure coal : but I could not determine that it con- 

 tains any. It is probably a variety of shale. 



No. 59. Very coarse^ dark gray pudding stone — A gene- 

 ral description of this rock has already been given in the be- 

 ginning of this article. (No. 13.) Imperfectly stratified at 

 this place, rather harder than the old red sandstone conglom- 

 erate, yet appearing as if composed of little else than a mass 

 of pebbles, the cement being not abundant, extending at 

 least a quarter of a mile. The Connecticut at this place 

 has worn a passage between this rock and the primitive, and 

 hiiih ledges appear on both sides of the river, which, on 

 comparison, seem to differ almost toto coelo. The pudding- 

 stone extends through Montague, sometimes assuming a 

 reddish aspect, and in Sunderland forms a considerable part 

 of Mount Toby. Here it alternates with the red and gray 

 slates above described; and it is curious to observe the fre- 

 quent sudden changes from this coarsest of conglomerates to 

 fine grained slates. 



