wm the wrieinity of Great Barrington, Mass. 453 
’ ) 
from the hard jointed to the softer bedded kind. 
Traces of similar bedding, and of like softness in the rock 
where bedded, occur at the northern margin of the eastern crest 
of quartzite, along the path descending northward; also in 
some places near the hard quartzite of the southwestern wall, 
where, at places, I passed isolated masses of great size undergoing 
deep disintegration, that bore evidences of the great amount of 
degradation which had taken place around them. 
Descending the western slope, toward the Housatonic river 
and village, the quartzite is passed; and then a.region of schist, 
indicated (as stated above) by a sudden substitution over the 
slopes of loose masses of schist in place of quartzite; and, 
finally, within less than a hundred feet of the base, on the path 
leading northwestward toward the old furnace, there is an 
to 80 feet, is probably due to the abrupt change in the rock 
ind 
drift, so that the thickness of the schist was not ascertained ; it 
oy, does not exceed 50 feet. The limestone is the true 
tockbridge limestone. 
_ the same low anticlinal is here apparent that is represented 
m figure 1; and it is further evident that the anticlinal has an 
inclined axis dipping southward, inasmuch as the limestone, 
an inferior stratum in the fold, is exposed on going north, 
while covered to the south. 
€ mica schist of the interior of ee lpr ga tn 
part of the gneiss layers, decom rapidly and deeply, and by 
this means peer of the sinew ane phy overs ath earth, 
which is partly clayey. 
country adjoining on the west, south, and east. 
[To be continued] _ 
