Geology, §c. of the Connecticut. 69 
No. 56. Same as No. 51, extending eneles mile, dip 
at first 35°, but gradually decreasing to 15° he direction 
of the strata of this rock is quite different from the other va- 
rieties, which generally have a direction between north an 
northeast. But this variety is so much wheeled that it runs 
not far from east and west; and in passing up the a = 
sail for a time nearly parallel to the direction of 
I do not see why this rock might not be employed rhe roof. 
ing; and if so, the situation of the quarries would surely 
Ss. 
7. Same as No. 9, strata nearly perpendicular, a8 
leaning a little to the east, and their direction nearly t 
same as that of all the varieties eucsicuad except the ory 
Thickness 10 rods. 
ces by rae in every directions: ‘he surface of these 
a s is : equently a little glazed. Rock, friable, 
scarcely micaceous, argillaceous, strata leaning a few de 
“on grees 
tothe 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 afi Oe that it con- 
tains — a is probably a variety of sha 
No. coarse, dark gray puetingstone—A gene- 
ral soutsighet of this rock ae already been given in the be- 
ginning of this article. (No. 13.) imperfectly aritiGed at 
this place, rather harder than the old red sandstone conglom- 
erate, yet appearing as if composed of little else than a mass 
of pebble: es, wee — ent being not abundant, extending at 
Phe Connecticut at this place 
stone extends choses ontagu e, som etimes 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 te 
fine grained slates. 
