J.D. Dana—Taconie Rocks and Stratigraphy. 217 
well-bedded fragile kind. The latter is most common, it is 
often micaceous and graduates into arenaceous mica schist, and 
thence into ordinary mica schist. These rocks, like the schists 
of the west side of the Housatonic River, overlie conformably 
the limestone formation. Farther north in Berkshire county, 
they occur also to some extent on the west side of the river; 
and one such area extends over the northern border of Sheffield 
(see map). The following sections exhibit the order of super- 
position. 
a. West of South Canaan near the house of Mr. T. H. Palmer, 
and in the fields north and south of it there is the very narrow 
top of an anticlinal outcrop. Its direction is N. 20°-31° W. 
By the north side of the house, at a small quarry, the arching 
limestone has the schist in place on the northern side of the 
arch, as represented in fig. 11. The dips are greater to the 
Nght, as shown in the figure, and correspond to the distance 
Sy outcrop of limestone occurs near b 
show whether the quartzyte is overlying 
: Paria 
any, 
tain; and beyond 
isa’ on the north side to the eastern boundary of Cana 
th, » On the opposite to the road up the moun 
“Sse points rapidly declines. 
