44 J. D. Dana— Geology of Vermont and Berkshire. 
a mile east of the village, consists below of thick-bedded gneiss, 
similar to part of that of Monument Mountain, but contorted 
in its bedding and dipping 40° to 50° to the eastward ; at top, 
for the upper 100 feet, it is laminated quartzyte (fig. 12), re- 
sembling the laminated quartzyte of many other localities in 
the limestone region. This quartzyte is gneissoid in many 
places, or a sandy gneiss, making manifest thereby the close 
relations of the two rocks. 
SS SS 
Kast Mountain, Great Barrington. Cobble Hill, South Canaan. 
In South Canaan, east of the village, Cobble Hill consists 
below, to the west, of a soft-bedded quartzyte, dipping south- 
eastward 40° (fig. 13), twenty to twenty-five feet of which aré 
exposed on the road side; next above, a stratum of mica schist 
and thin-bedded gneiss, containing scales of both black and white 
mica; and then a whitish, granite-like gneiss. The quartzyte 
contains at intervals, in its upper part, streaks of black and 
white mica, and thus exhibits its relations to and passage into 
the overlying gneiss. 
East of the village of Lee, a low ridge consists below of 
uartzyte; at middle of mica schist; and at top of quartzyte— 
all dipping eastward 15° to 25° (fig. 14). 
(3.) Interstratifiel quartzyte, limestone, and schists. 
The fact that the quartzyte keeps by the side of the limestone, 
with small exceptions, from its northern limit southward to 
Connecticut suggests that there is a close stratigraphical con- 
nection between them. Further, seeing that the limestone occurs 
interstratified with the schists, and also the quartzyte of the 
same region with the same schists, there would seem to 
hardly any ground for questioning the inference that the quartz- 
yte and limestone are parts of the same great series of forma- 
SS AGG 9 
East of the village of Lee. Quartzyte ridge east of south end of Tom Ball. 
tions. On these fgrounds and the 
near by, it would be a reasonable inference that the strata of 
occurrence of limestone _ 
